A rare uranium supergene minerals, phurcalite and uranophane-beta, were found in association with metaautunite at fissures of granitoid rocks in the active Wagner quarry in Ruprechtice near Liberec (northern Bohemia, Czech Republic). Phurcalite occurs there as bright to deep yellow coatings with an area up to 10 × 3 mm in size composed of acicular to columnar crystals up to 0.5 mm in length. It is orthorhombic, space group Pbca, the unit-cell parameters refined from X-ray powder diffraction data are: a 17.3973(18), b 16.0161(15), c 13.5693(19) Å, V 3780.9(5) Å3. Chemical analyses of phurcalite correspond to the empirical formula Ca2.20(UO2)3.06(PO4)1.96(AsO4)0.04O2.26·7H2O. Uranophane-beta forms a relatively abundant pale yellow coatings of up to 2 × 2 cm in size composed of translucent to transparent acicular crystals with a vitreous lustre and a length of up to 0.2 mm. It is monoclinic, space group P21/a, the unit-cell parameters refined from X-ray powder diffraction data are: a 13.959(2), b 15.5420(16), c 6.6227(9) Å, β 91.43(1)o and V 1436.3(2) Å3. Chemical analyses of uranophane-beta correspond to the empirical formula Ca1.09(UO2)1.99[(SiO3OH)1.68 (PO4)0.29(AsO4)0.03]Σ2.00·5H2O. Metaautunite occurs there as abundant light yellow aggregates with an area up to some cm2 in size composed of tiny (up to 0.5 mm) tabular crystals or rarely as well-developed individual tabular crystals up to several mm in size. It clearly differs from other minerals in the association by very strong yellow-green luminescence in both short- and long-wave UV radiation. It is tetragonal, space group P4/nmm, the unit-cell parameters refined from X-ray powder diffraction data are: a 7.006(2), c 16.899(4) Å and V 829.4(6) (5) Å3. Chemical analyses of metaautunite correspond to the empirical formula Ca1.03(UO2)2.09(PO4)1.96(AsO4)0.04·6H2O.
在捷克北部Liberec附近的Ruprechtice Wagner采石场的花岗岩体裂隙中，发现了一种罕见的铀表生矿物——辉石和铀- β。辉石以亮黄色到深黄色的涂层出现，面积可达10 × 3毫米，由针状到柱状晶体组成，长度可达0.5毫米。它是正交的，空间群Pbca，从x射线粉末衍射数据中得到的单位胞参数为:a 17.3973(18)， b 16.0161(15)， c 13.5693(19) Å， V 3780.9(5) Å3。辉石的化学分析公式为Ca2.20(UO2)3.06(PO4)1.96(AsO4) 0.040 o2.26·7H2O。天王星- β形成相对丰富的浅黄色涂层，大小可达2 × 2厘米，由半透明到透明的针状晶体组成，具有玻璃般的光泽，长度可达0.2毫米。它为单斜晶，空间群P21/a，由x射线粉末衍射数据细化的单胞参数为:a 13.959(2)， b 15.5420(16)， c 6.6227(9) Å， β 91.43(1)o和V 1436.3(2) Å3。化学分析结果为Ca1.09(UO2)1.99[(SiO3OH)1.68 (PO4)0.29(AsO4)0.03]Σ2.00·5H2O。偏黄钨矿以丰富的浅黄色聚集体的形式出现，其面积可达几平方厘米，由微小的(可达0.5毫米)板状晶体组成，或很少发育良好的单个板状晶体，大小可达几毫米。它在短波和长波紫外线辐射中都发出非常强的黄绿色发光，明显不同于该协会的其他矿物质。它为四边形，空间群为P4/nmm，由x射线粉末衍射数据得到的单胞参数为:a 7.006(2)， c 16.899(4) Å和V 829.4(6) (5) Å3。偏黄钨矿的化学分析公式为Ca1.03(UO2)2.09(PO4)1.96(AsO4)0.04·6H2O。
{"title":"Phurcalit a uranofán-beta z Ruprechtic u Liberce (Česká republika)","authors":"J. Sejkora, Jaromír Tvrdý, Vojtěch Mai","doi":"10.46861/bmp.30.145","DOIUrl":"https://doi.org/10.46861/bmp.30.145","url":null,"abstract":"A rare uranium supergene minerals, phurcalite and uranophane-beta, were found in association with metaautunite at fissures of granitoid rocks in the active Wagner quarry in Ruprechtice near Liberec (northern Bohemia, Czech Republic). Phurcalite occurs there as bright to deep yellow coatings with an area up to 10 × 3 mm in size composed of acicular to columnar crystals up to 0.5 mm in length. It is orthorhombic, space group Pbca, the unit-cell parameters refined from X-ray powder diffraction data are: a 17.3973(18), b 16.0161(15), c 13.5693(19) Å, V 3780.9(5) Å3. Chemical analyses of phurcalite correspond to the empirical formula Ca2.20(UO2)3.06(PO4)1.96(AsO4)0.04O2.26·7H2O. Uranophane-beta forms a relatively abundant pale yellow coatings of up to 2 × 2 cm in size composed of translucent to transparent acicular crystals with a vitreous lustre and a length of up to 0.2 mm. It is monoclinic, space group P21/a, the unit-cell parameters refined from X-ray powder diffraction data are: a 13.959(2), b 15.5420(16), c 6.6227(9) Å, β 91.43(1)o and V 1436.3(2) Å3. Chemical analyses of uranophane-beta correspond to the empirical formula Ca1.09(UO2)1.99[(SiO3OH)1.68 (PO4)0.29(AsO4)0.03]Σ2.00·5H2O. Metaautunite occurs there as abundant light yellow aggregates with an area up to some cm2 in size composed of tiny (up to 0.5 mm) tabular crystals or rarely as well-developed individual tabular crystals up to several mm in size. It clearly differs from other minerals in the association by very strong yellow-green luminescence in both short- and long-wave UV radiation. It is tetragonal, space group P4/nmm, the unit-cell parameters refined from X-ray powder diffraction data are: a 7.006(2), c 16.899(4) Å and V 829.4(6) (5) Å3. Chemical analyses of metaautunite correspond to the empirical formula Ca1.03(UO2)2.09(PO4)1.96(AsO4)0.04·6H2O.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70599854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Pauliš, Stanislav Kopecký, Z. Dolníček, J. Sejkora, Ondřej Pour, Jana Ulmanová, Stanislav Kopecký, ml.
The occurrence of tungsten mineralization of greisen type with the dominant ferberite and scheelite in quartz veins was detected in 1963 at the site Pekelský vrch near Jihlava. We conducted a detailed mineralogical research of the vein material sampled in the years 2020 - 2022. The dominating tungsten mineralization is represented especially by two chemically different types of ferberite, including relatively pure younger ferberite and older generation of ferberite containing substantial amounts of hübnerite (19 - 45 mol.%) and huanzalaite component (2.6 - 4.1 mol.%). Widespread scheelite replaces earlier ferberite, and is replaced by younger generation of ferberite. The Ti,W-rich columbite-(Fe) is an accessory phase associated with younger generation of ferberite. In addition to tungsten mineralization, there was recorded a varied sulphidic mineralization with dominating pyrite, chalcopyrite, galena, molybdenite and rare sulphosalts including matildite and gustavite, and locally also tellurosulphides (joséite-A and joséite-B), native bismuth and electrum. The supergene mineralization with Fe3+ hydroxides, bismutite, bismite, petitjeanite, kintoreite, corkite, plumbogummite, jarosite and iodargyrite is relatively rare. The gangue is dominated by quartz with flakes of low-F phengitic muscovite and rare siderite and fluorapatite. In addition, a fragment of an Al-rich rock, composed of corundum, andalusite, margarite and muscovite, was identified in the dump material. A total of 32 mineral species was found there.
{"title":"Wolframová a sulfidická hydrotermální mineralizace z Pekelského vrchu u Jihlavy (Česká republika)","authors":"P. Pauliš, Stanislav Kopecký, Z. Dolníček, J. Sejkora, Ondřej Pour, Jana Ulmanová, Stanislav Kopecký, ml.","doi":"10.46861/bmp.30.073","DOIUrl":"https://doi.org/10.46861/bmp.30.073","url":null,"abstract":"The occurrence of tungsten mineralization of greisen type with the dominant ferberite and scheelite in quartz veins was detected in 1963 at the site Pekelský vrch near Jihlava. We conducted a detailed mineralogical research of the vein material sampled in the years 2020 - 2022. The dominating tungsten mineralization is represented especially by two chemically different types of ferberite, including relatively pure younger ferberite and older generation of ferberite containing substantial amounts of hübnerite (19 - 45 mol.%) and huanzalaite component (2.6 - 4.1 mol.%). Widespread scheelite replaces earlier ferberite, and is replaced by younger generation of ferberite. The Ti,W-rich columbite-(Fe) is an accessory phase associated with younger generation of ferberite. In addition to tungsten mineralization, there was recorded a varied sulphidic mineralization with dominating pyrite, chalcopyrite, galena, molybdenite and rare sulphosalts including matildite and gustavite, and locally also tellurosulphides (joséite-A and joséite-B), native bismuth and electrum. The supergene mineralization with Fe3+ hydroxides, bismutite, bismite, petitjeanite, kintoreite, corkite, plumbogummite, jarosite and iodargyrite is relatively rare. The gangue is dominated by quartz with flakes of low-F phengitic muscovite and rare siderite and fluorapatite. In addition, a fragment of an Al-rich rock, composed of corundum, andalusite, margarite and muscovite, was identified in the dump material. A total of 32 mineral species was found there.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70599540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
New occurrence of pebbles of chloritoid schists, found in Eocene-to-Oligocene conglomerates of the Zlín Formation, Rača Unit, Magura Flysch, Outer Western Carpathians, Czech Republic, is characterized in this contribution. The rock has very simple mineral composition, including chloritoid, quartz, white mica and trace amount of apatite, rutile, and monazite. Chloritoid contains only very small proportions of magnesiochloritoid (7 - 11 mol. %) and ottrelite (up to 0.4 mol. %) components. The composition of white mica corresponds to muscovite and illite. The significant differences in mineral assemblages of rocks as well as in chemical composition of chloritoid and white mica usually appeared during comparison with those of similar rock types occurring in potential source areas in the Czech Republic, Slovakia, and Austria. The best comparable chemical composition showed only chloritoid in chloritoid schist from Bělá in the Hrubý Jeseník Mts., Silesicum, Czech Republic.
{"title":"Příspěvek k poznání exotických hornin flyšového pásma Západních Karpat: chloritoidová břidlice z Nového dvora u Kvasic (Chřiby)","authors":"Z. Dolníček, Rostislav Koutňák, Jana Ulmanová","doi":"10.46861/bmp.30.188","DOIUrl":"https://doi.org/10.46861/bmp.30.188","url":null,"abstract":"New occurrence of pebbles of chloritoid schists, found in Eocene-to-Oligocene conglomerates of the Zlín Formation, Rača Unit, Magura Flysch, Outer Western Carpathians, Czech Republic, is characterized in this contribution. The rock has very simple mineral composition, including chloritoid, quartz, white mica and trace amount of apatite, rutile, and monazite. Chloritoid contains only very small proportions of magnesiochloritoid (7 - 11 mol. %) and ottrelite (up to 0.4 mol. %) components. The composition of white mica corresponds to muscovite and illite. The significant differences in mineral assemblages of rocks as well as in chemical composition of chloritoid and white mica usually appeared during comparison with those of similar rock types occurring in potential source areas in the Czech Republic, Slovakia, and Austria. The best comparable chemical composition showed only chloritoid in chloritoid schist from Bělá in the Hrubý Jeseník Mts., Silesicum, Czech Republic.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70600119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A detailed mineralogical study of a sample of quartz gangue containing macroscopically visible acicular rutile, which was collected in area of former Cu(-Ag) ore deposit NE from Paseky nad Jizerou, yielded a number of mineralogical findings. The mineralization is bound to strongly elongated quartz lenses, arranged conformably with schistosity of host phyllite of the Krkonoše-Jizera Crystalline Complex. Rutile is polysynthetically lamelled and compositionally zoned, with elevated contents of Fe (0.004 - 0.015 apfu), Nb (0.001 - 0.004 apfu), V (0.001 - 0.002 apfu) and W (0.000 - 0.006 apfu). It contains microscopic platy inclusions of ilmenite, which are regularly distributed in up to three crystallographic directions (probably cleavage planes) regardless of compositional zoning of host rutile. In addition, sporadic occurrence of aggregates composed of fluorapatite, phengitic muscovite and clinochlore was found too. The studied mineralization has metamorphic-secretory origin. The observed microstructural arrangement of inclusions of ilmenite in rutile host is very uncommon worldwide. With respect to evidently LP-LT origin of mineralization, we interpret its origin not in terms of exsolution but in terms of younger hypogene alteration of pre-existing rutile by fluids with relatively low Eh. The activity of such “suitable” fluids can be illustrated during crystallization of chlorite, which was formed at temperatures 137 - 160 °C and at log fO2 between -49.2 and -53.1 bar.
{"title":"Krystalograficky orientovaný srůst rutilu a ilmenitu a doprovodné minerály z Pasek nad Jizerou (krkonošsko-jizerské krystalinikum)","authors":"Z. Dolníček, Jana Ulmanová","doi":"10.46861/bmp.30.019","DOIUrl":"https://doi.org/10.46861/bmp.30.019","url":null,"abstract":"A detailed mineralogical study of a sample of quartz gangue containing macroscopically visible acicular rutile, which was collected in area of former Cu(-Ag) ore deposit NE from Paseky nad Jizerou, yielded a number of mineralogical findings. The mineralization is bound to strongly elongated quartz lenses, arranged conformably with schistosity of host phyllite of the Krkonoše-Jizera Crystalline Complex. Rutile is polysynthetically lamelled and compositionally zoned, with elevated contents of Fe (0.004 - 0.015 apfu), Nb (0.001 - 0.004 apfu), V (0.001 - 0.002 apfu) and W (0.000 - 0.006 apfu). It contains microscopic platy inclusions of ilmenite, which are regularly distributed in up to three crystallographic directions (probably cleavage planes) regardless of compositional zoning of host rutile. In addition, sporadic occurrence of aggregates composed of fluorapatite, phengitic muscovite and clinochlore was found too. The studied mineralization has metamorphic-secretory origin. The observed microstructural arrangement of inclusions of ilmenite in rutile host is very uncommon worldwide. With respect to evidently LP-LT origin of mineralization, we interpret its origin not in terms of exsolution but in terms of younger hypogene alteration of pre-existing rutile by fluids with relatively low Eh. The activity of such “suitable” fluids can be illustrated during crystallization of chlorite, which was formed at temperatures 137 - 160 °C and at log fO2 between -49.2 and -53.1 bar.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70599446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Martin Števko, Jiří Sejkora, František Kuraj, Matej Rybárik
Two new localities of pyromophite were recently discovered at the Chvojnica base metals occurrence in the Strážovské vrchy Mts. (Tatric Unit), and at the supergene zone of the Piata siderite-type hydrothermal vein near Hnilčík (Spišsko-gemerské rudohorie Mts., Gemeric Unit), Slovak Republic. At the Chvojnica occurrence pyromorphite occurs as bright green crystalline crusts and radial aggregates up to 3 mm developed in cavities and fractures in the porous quartz gangue with relicts of primary galena. It is associated with minor crystalline coatings of cerussite. The refined unit-cell parameters of pyromorphite from Chvojnica (for the hexagonal space group P63/m) are a 9.9750(2) Å, c 7.3569(2) Å and V 633.93(2) Å3. Except of dominant contents of Pb, P and Cl, only minor amounts of Ca (up to 0.10 apfu), Al (up to 0.05 apfu), Fe (up to 0.04 apfu), As (up to 0.05 apfu) and S (up to 0.02 apfu) were detected in studied pyromorphite. At the Hnilčík, pyromorphite occurs rarely in the cavities of the cavernous quartz-limonite gangue in the supergene zone of the Piata vein. It forms colourless to very light green prismatic crystals up to 2 mm in size, or crystalline aggregates associated with goethite, Mn oxides and malachite. The refined unit-cell parameters of pyromorphite from Hnilčík (for the hexagonal space group P63/m) are a 9.9484(15) Å, c 7.315(2) Å, V 627.0(2) Å3 (Ca-poor) and a 9.8983(6) Å, c 7.2589(8) Å, V 615.92(9) Å3 (Ca-rich). Pyromorphite from Hnilčík shows strong chemical zoning caused by variation of Pb and Ca contents, with outer parts of the crystals enriched in Ca. Contents of Ca are ranging between 0.09 to 0.96 apfu, with the atomic Pb/(Pb+Ca) ratio ranging from 0.98 to 0.81, which is close to the compositional boundary with phosphohedyphane. Interesting are also elevated concentrations of Cu reaching up to 0.07 apfu. Other minor elements detected in pyromorphite from Hnilčík are As (up to 0.12 apfu), Al, V and S (all up to 0.02 apfu).
最近在斯洛伐克共和国Strážovské vrchy Mts. (Tatric单元)的Chvojnica贱金属矿床和Hnilčík (Spišsko-gemerské rudohorie Mts.， generic单元)附近的Piata菱铁矿型热液脉的表生带发现了两个新的辉绿铁矿地点。在Chvojnica产状中，焦闪石以亮绿色结晶结壳的形式出现，在多孔石英脉石的孔洞和裂缝中发育着长达3毫米的放射状聚集体，伴有原生方铅矿的残余。它与少量的铜矿结晶涂层有关。Chvojnica焦闪石(六边形空间群P63/m)的精细化单位胞参数为:a 9.9750(2) Å， c 7.3569(2) Å和V 633.93(2) Å3。除Pb、P和Cl的主要含量外，还检出少量的Ca(可达0.10 apfu)、Al(可达0.05 apfu)、Fe(可达0.04 apfu)、As(可达0.05 apfu)和S(可达0.02 apfu)。在Hnilčík处，皮亚塔脉表生带海绵状石英-褐铁矿脉石的孔洞中很少出现焦闪石。它形成无色到非常浅绿色的棱柱状晶体，大小可达2毫米，或与针铁矿、锰氧化物和孔雀石相关的结晶聚落。从Hnilčík(对于六边形空间群P63/m)得到的焦闪石的精化单位胞参数为:9.9484(15)Å， c 7.315(2) Å， V 627.0(2) Å3(贫钙)和9.8983(6)Å， c 7.2589(8) Å， V 615.92(9) Å3(富钙)。Hnilčík焦闪石中Pb、Ca含量变化引起的化学分带性较强，晶体外部富集Ca, Ca含量在0.09 ~ 0.96 apfu之间，Pb/(Pb+Ca)原子比值在0.98 ~ 0.81之间，接近与磷磷脂的组成边界。有趣的是，铜的浓度也升高了，高达0.07 apfu。在Hnilčík的焦闪石中检测到的其他微量元素有As(高达0.12 apfu)， Al, V和S(均高达0.02 apfu)。
{"title":"Dve nové lokality pyromorfitu v Slovenskej republike: Chvojnica a Hnilčík","authors":"Martin Števko, Jiří Sejkora, František Kuraj, Matej Rybárik","doi":"10.46861/bmp.30.038","DOIUrl":"https://doi.org/10.46861/bmp.30.038","url":null,"abstract":"Two new localities of pyromophite were recently discovered at the Chvojnica base metals occurrence in the Strážovské vrchy Mts. (Tatric Unit), and at the supergene zone of the Piata siderite-type hydrothermal vein near Hnilčík (Spišsko-gemerské rudohorie Mts., Gemeric Unit), Slovak Republic. At the Chvojnica occurrence pyromorphite occurs as bright green crystalline crusts and radial aggregates up to 3 mm developed in cavities and fractures in the porous quartz gangue with relicts of primary galena. It is associated with minor crystalline coatings of cerussite. The refined unit-cell parameters of pyromorphite from Chvojnica (for the hexagonal space group P63/m) are a 9.9750(2) Å, c 7.3569(2) Å and V 633.93(2) Å3. Except of dominant contents of Pb, P and Cl, only minor amounts of Ca (up to 0.10 apfu), Al (up to 0.05 apfu), Fe (up to 0.04 apfu), As (up to 0.05 apfu) and S (up to 0.02 apfu) were detected in studied pyromorphite. At the Hnilčík, pyromorphite occurs rarely in the cavities of the cavernous quartz-limonite gangue in the supergene zone of the Piata vein. It forms colourless to very light green prismatic crystals up to 2 mm in size, or crystalline aggregates associated with goethite, Mn oxides and malachite. The refined unit-cell parameters of pyromorphite from Hnilčík (for the hexagonal space group P63/m) are a 9.9484(15) Å, c 7.315(2) Å, V 627.0(2) Å3 (Ca-poor) and a 9.8983(6) Å, c 7.2589(8) Å, V 615.92(9) Å3 (Ca-rich). Pyromorphite from Hnilčík shows strong chemical zoning caused by variation of Pb and Ca contents, with outer parts of the crystals enriched in Ca. Contents of Ca are ranging between 0.09 to 0.96 apfu, with the atomic Pb/(Pb+Ca) ratio ranging from 0.98 to 0.81, which is close to the compositional boundary with phosphohedyphane. Interesting are also elevated concentrations of Cu reaching up to 0.07 apfu. Other minor elements detected in pyromorphite from Hnilčík are As (up to 0.12 apfu), Al, V and S (all up to 0.02 apfu).","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70599589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Sejkora, Z. Dolníček, Pavel Škácha, Jana Ulmanová, Luboš Vrtiška
The unusual mineralization with willemite, rare Cu arsenides (koutekite, kutinaite) and balkanite was found at a sample originating from the Jerusalém deposit (shaft No. 9), Příbram uranium and base-metal ore district (Czech Republic). The gangue is formed by earlier siderite and quartz intensively replaced by abundant willemite and younger dolomite group minerals with hematite inclusions and the youngest calcite. The ore mineralization represented by sphalerite, djurleite, anilite, covellite, stromeyerite, balkanite, koutekite, kutinaite, primary anglesite and Hg-rich silver is accompanied by Zn-rich hisingerite, baileychlore and Fe-oxides with variable but significant Si contents. The detailed description and quantitative chemical data for individual mineral phases are given. The studied mineralization was formed in significantly changing redox conditions (from reducing to highly oxidizing) with a distinct decrease of temperature (down to below 70(3) °C).
{"title":"Neobvyklá asociace minerálů s willemitem z prostoru centrální části příbramského uran - polymetalického revíru (Česká republika)","authors":"J. Sejkora, Z. Dolníček, Pavel Škácha, Jana Ulmanová, Luboš Vrtiška","doi":"10.46861/bmp.30.224","DOIUrl":"https://doi.org/10.46861/bmp.30.224","url":null,"abstract":"The unusual mineralization with willemite, rare Cu arsenides (koutekite, kutinaite) and balkanite was found at a sample originating from the Jerusalém deposit (shaft No. 9), Příbram uranium and base-metal ore district (Czech Republic). The gangue is formed by earlier siderite and quartz intensively replaced by abundant willemite and younger dolomite group minerals with hematite inclusions and the youngest calcite. The ore mineralization represented by sphalerite, djurleite, anilite, covellite, stromeyerite, balkanite, koutekite, kutinaite, primary anglesite and Hg-rich silver is accompanied by Zn-rich hisingerite, baileychlore and Fe-oxides with variable but significant Si contents. The detailed description and quantitative chemical data for individual mineral phases are given. The studied mineralization was formed in significantly changing redox conditions (from reducing to highly oxidizing) with a distinct decrease of temperature (down to below 70(3) °C).","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70599870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
At the II. horizon of the Eastern shaft of Handlová coal mine the occurrence of mineral assemblage of secondary minerals was identified. These accumulations consist of sulphate group minerals confirmed by PXRD and semiquantitative chemical analysis (EDS), namely gypsum, alunogen, pickeringite, melanterite, sideronatrite and epsomite. Sulphates form coatings, crystalline crusts and aggregates, which crystallized on the walls of mine corridors. The dimensions of these accumulations are reaching approximately 1.5 x 1.3 m with thickness up to 5 cm. The refined unit-cell parameters of alunogen (for the triclinic space group P-1) are: a 7.413(1), b 26.944(4), c 6.051(1) Å, α 90.05(1), β 97.65(1), γ 91.82(1)°, V 1197.1(3) Å3, pickeringite (for the monoclinic space group P21/c): a 6.1808(8), b 24.252(2), c 21.220(2) Å, β 100.36(1)°, V 3128.8(6) Å3 and melanterite (for the monoclinic space group P21/c): a 14.022(5), b 6.503(2), c 10.945(4) Å, β 105.83(3)°, V 960.2(7) Å3. Sideronatrite and epsomite were identified in mixture with the most significant diffraction maxima for sideronatrite: 10.252/100, 4.905/37, 3.424/10, 3.067/9 and epsomite: 5.347/18, 5.302/18, 4.489/26, 4.215/100, 4.201/59, 2.880/24, 2.747/23, 2.677/18. Accumulations of minerals were formed on the mine walls. Secondary sulphates are considered as products of the weathering of Fe-rich carbonates, pyrite and other sulphidic minerals which are part of associated pelosiderites embedded in the clays and claystones. Locally, gypsum and hexahydrite were also identified in the form of transparent crystals and white powdery aggregates on the calcite speleothems genetically linked to Mesozoic limestones and gypsum-rich Lower Triassic Werfen Formation. Unit-cell parameters refined from X-ray powder diffraction data are for hexahydrite (for the monoclinic space group C2/c): a 10.107(1), b 7.2114(8), c 24.424(3) Å, β 98.28(1)°, V 1761.7(3) Å3.
在第二。确定了汉洛夫煤矿东竖井层位次生矿物组合的赋存状态。这些堆积物由经PXRD和半定量化学分析(EDS)证实的硫酸盐族矿物组成，即石膏、铝原、pickeringite、melanterite、菱铁矿和epsomite。硫酸盐形成涂层、结晶结壳和聚集体，在矿廊壁上结晶。这些堆积的尺寸约为1.5 x 1.3 m，厚度达5 cm。三斜空间群P-1的铝原精胞参数为:a 7.413(1)， b 26.944(4)， c 6.051(1) Å， α 90.05(1)， β 97.65(1)， γ 91.82(1)°，V 1197.1(3) Å3, pickeringite(单斜空间群P21/c): a 6.1808(8)， b 24.252(2)， c 21.220(2) Å， β 100.36(1)°，V 3128.8(6) Å3, melanterite(单斜空间群P21/c): a 14.022(5)， b 6.503(2)， c 10.945(4) Å， β 105.83(3)°，V 960.2(7) Å3。菱铁矿和epsomite混合鉴定，其中菱铁矿的最大衍射峰为10.252/100、4.905/37、3.424/10、3.067/9,epsomite的最大衍射峰为5.347/18、5.302/18、4.489/26、4.215/100、4.201/59、2.580 /24、2.747/23、2.677/18。矿壁上形成了矿物的堆积。次生硫酸盐被认为是富铁碳酸盐、黄铁矿和其他硫化物矿物风化的产物，这些矿物是包裹在粘土和粘土岩中的伴生钙铁矿的一部分。局部的方解石洞穴中还发现了石膏和六水合石，它们以透明晶体和白色粉状聚集体的形式存在，与中生代灰岩和富石膏的下三叠统Werfen组有关。从x射线粉末衍射数据中改进的单位胞参数为六水螅体(单斜空间群C2/c): a 10.107(1)， b 7.2114(8)， c 24.424(3) Å， β 98.28(1)°，V 1761.7(3) Å3。
{"title":"Supergénna mineralizácia na II. horizonte Východnej šachty hnedouhoľnej bane Handlová (Slovenská republika)","authors":"Pavol Myšľan, Martin Števko, Karsten Ivan","doi":"10.46861/bmp.30.214","DOIUrl":"https://doi.org/10.46861/bmp.30.214","url":null,"abstract":"At the II. horizon of the Eastern shaft of Handlová coal mine the occurrence of mineral assemblage of secondary minerals was identified. These accumulations consist of sulphate group minerals confirmed by PXRD and semiquantitative chemical analysis (EDS), namely gypsum, alunogen, pickeringite, melanterite, sideronatrite and epsomite. Sulphates form coatings, crystalline crusts and aggregates, which crystallized on the walls of mine corridors. The dimensions of these accumulations are reaching approximately 1.5 x 1.3 m with thickness up to 5 cm. The refined unit-cell parameters of alunogen (for the triclinic space group P-1) are: a 7.413(1), b 26.944(4), c 6.051(1) Å, α 90.05(1), β 97.65(1), γ 91.82(1)°, V 1197.1(3) Å3, pickeringite (for the monoclinic space group P21/c): a 6.1808(8), b 24.252(2), c 21.220(2) Å, β 100.36(1)°, V 3128.8(6) Å3 and melanterite (for the monoclinic space group P21/c): a 14.022(5), b 6.503(2), c 10.945(4) Å, β 105.83(3)°, V 960.2(7) Å3. Sideronatrite and epsomite were identified in mixture with the most significant diffraction maxima for sideronatrite: 10.252/100, 4.905/37, 3.424/10, 3.067/9 and epsomite: 5.347/18, 5.302/18, 4.489/26, 4.215/100, 4.201/59, 2.880/24, 2.747/23, 2.677/18. Accumulations of minerals were formed on the mine walls. Secondary sulphates are considered as products of the weathering of Fe-rich carbonates, pyrite and other sulphidic minerals which are part of associated pelosiderites embedded in the clays and claystones. Locally, gypsum and hexahydrite were also identified in the form of transparent crystals and white powdery aggregates on the calcite speleothems genetically linked to Mesozoic limestones and gypsum-rich Lower Triassic Werfen Formation. Unit-cell parameters refined from X-ray powder diffraction data are for hexahydrite (for the monoclinic space group C2/c): a 10.107(1), b 7.2114(8), c 24.424(3) Å, β 98.28(1)°, V 1761.7(3) Å3.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70600320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new occurrence of tintinaite was recently discovered at the Gašpar (Grexa) siderite-type hydrothermal vein with sulphides located in the Rožňavská dolina valley near Rožňava, Spišsko-gemerské rudohorie Mts., Rožňava Co., Košice Region, Slovakia. Tintinaite occurs as lead-gray, acicular to prismatic crystals up to 4 cm long or rich fibrous aggregates and nests reaching up to 7 × 5 cm, which are enclosed in quartz-siderite gangue. Crystals and aggregates of tintinaite are often directly associated with massive accumulations of older sulphides, especially arsenopyrite, chalcopyrite, pyrrhotite and pyrite. Grains and aggregates of younger native bismuth or bournonite are occasionally replacing aggregates of tintinaite. The refined unit-cell parameters of tintinaite (for the orthorhombic space group Pnnm) are: a 22.523(7) Å, b 34.137(11) Å, c 4.0389(14) Å and V 3105.4(1) Å3. The calculated value of N for tintinaite from the Gašpar vein is ranging from 1.93 to 2.00 and the Sb/(Sb+Bi) atomic ratio in three studied samples varies between 0.49 and 0.60, corresponding to Bi-rich tintinaite, with only one spot representing Sb-rich kobellite. The average Cu+Fe content in tintinaite is 1.96 apfu and minor concentrations of Ag (up to 0.14 apfu) and Se (up to 0.22 apfu) were also detected. The average (n = 55) empirical formula of tintinaite based on sum of all atoms = 63 apfu is (Pb10.56Ag0.07)10.63(Cu1.12Fe0.85)1.97(Sb8.50Bi6.75)15.25 (S35.01Se0.15)35.16. Bournonite is rare and it forms anhedral grains or aggregates up to 220 μm, which are replacing aggregates of tintinaite. Its average (n = 8) empirical formula of bournonite based on sum of all atoms = 6 apfu is Pb0.99Cu1.00(Sb0.98Bi0.03)1.01(S2.99Se0.01)3.00.
{"title":"New data on sulphosalts from the hydrothermal siderite-type veins in the Spišsko-gemerské rudohorie Mts. (eastern Slovakia): 3. Tintinaite and bournonite from the Gašpar (Grexa) vein near Rožňava","authors":"M. Števko, J. Sejkora, Z. Dolníček","doi":"10.46861/bmp.30.011","DOIUrl":"https://doi.org/10.46861/bmp.30.011","url":null,"abstract":"A new occurrence of tintinaite was recently discovered at the Gašpar (Grexa) siderite-type hydrothermal vein with sulphides located in the Rožňavská dolina valley near Rožňava, Spišsko-gemerské rudohorie Mts., Rožňava Co., Košice Region, Slovakia. Tintinaite occurs as lead-gray, acicular to prismatic crystals up to 4 cm long or rich fibrous aggregates and nests reaching up to 7 × 5 cm, which are enclosed in quartz-siderite gangue. Crystals and aggregates of tintinaite are often directly associated with massive accumulations of older sulphides, especially arsenopyrite, chalcopyrite, pyrrhotite and pyrite. Grains and aggregates of younger native bismuth or bournonite are occasionally replacing aggregates of tintinaite. The refined unit-cell parameters of tintinaite (for the orthorhombic space group Pnnm) are: a 22.523(7) Å, b 34.137(11) Å, c 4.0389(14) Å and V 3105.4(1) Å3. The calculated value of N for tintinaite from the Gašpar vein is ranging from 1.93 to 2.00 and the Sb/(Sb+Bi) atomic ratio in three studied samples varies between 0.49 and 0.60, corresponding to Bi-rich tintinaite, with only one spot representing Sb-rich kobellite. The average Cu+Fe content in tintinaite is 1.96 apfu and minor concentrations of Ag (up to 0.14 apfu) and Se (up to 0.22 apfu) were also detected. The average (n = 55) empirical formula of tintinaite based on sum of all atoms = 63 apfu is (Pb10.56Ag0.07)10.63(Cu1.12Fe0.85)1.97(Sb8.50Bi6.75)15.25 (S35.01Se0.15)35.16. Bournonite is rare and it forms anhedral grains or aggregates up to 220 μm, which are replacing aggregates of tintinaite. Its average (n = 8) empirical formula of bournonite based on sum of all atoms = 6 apfu is Pb0.99Cu1.00(Sb0.98Bi0.03)1.01(S2.99Se0.01)3.00.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70599418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Pauliš, Luboš Vrtiška, Z. Dolníček, Radana Malíková
Two zeolites are described from the pyrite-manganese deposit Chvaletice near Přelouč, central Bohemia, Czech Republic. Ferrierite-Mg forms brown, up to 5 mm long flat needles, radially arranged, which grow on grey-brown fine-grained rock composed of quartz, pyrite and Mn-silicates. The unit-cell parameters of ferrierite-Mg, refined from the powder X-ray diffraction data, are a = 19.162(14), b = 14.125(13), c = 7.495(6) Å and V = 2028.8(9) Å3 (space group Immm). Chemical analyses correspond to the empirical formula (Mg2.66Ca0.44Mn0.41Fe0.30Ba0.29K0.16Na0.10Sr0.03)Σ4.39(Al7.77 Si27.96O72)·18 H2O. The Ba-rich heulandite forms aggregates up to several cm in size composed of transparent gold-brown grains with characteristic pearly luster at cleavage planes. The unit-cell parameters of heulandite, refined from the powder X-ray diffraction data, are a = 17.732(2), b = 17.823(4), c = 7.4290(15) Å, β = 116.3(2) ° and V = 2104.2(6) Å3 (space group Cm). In BSE images, its aggregates are not homogenous. Ba-poor part of analyses corresponds to heulandite-Ca and heulandite-K, Ba-rich part beside Ca- and K-dominant members also to very rare heulandite-Ba. Both studied zeolites contain a significant content of Mn, ranging between 0.32 - 0.70 apfu (ferrierite-Mg) and 0.09 - 0.28 apfu (Ba-rich heulandite).
在捷克共和国波希米亚中部Přelouč附近的Chvaletice黄铁矿锰矿床中描述了两种沸石。铁素体-镁形成棕色，长达5毫米的扁平针状，呈放射状排列，生长在由石英、黄铁矿和锰硅酸盐组成的灰褐色细粒岩石上。根据粉末x射线衍射数据，得到铁素体- mg的单位胞参数为a = 19.162(14)， b = 14.125(13)， c = 7.495(6) Å， V = 2028.8(9) Å3(空间群Immm)。化学分析对应于实验式(Mg2.66Ca0.44Mn0.41Fe0.30Ba0.29K0.16Na0.10Sr0.03)Σ4.39(Al7.77 Si27.96O72)·18 H2O。富钡的榴辉石聚集体大小可达数厘米，由透明的金棕色颗粒组成，在解理面上具有典型的珍珠光泽。根据粉末x射线衍射数据，得到了heulandite的单位胞参数:a = 17.732(2)， b = 17.823(4)， c = 7.4290(15) Å， β = 116.3(2)°，V = 2104.2(6) Å3(空间群Cm)。在疯牛病图像中，其聚合体不是均匀的。贫ba的部分对应于钙镁镁和钾镁，富ba的部分也对应于非常罕见的钙钾镁镁。两种沸石的锰含量均较高，分别为0.32 ~ 0.70 apfu(铁素体- mg)和0.09 ~ 0.28 apfu(富钡的橄榄石)。
{"title":"Ferrierit-Mg a Ba bohatý heulandit z Chvaletic u Přelouče (Česká republika)","authors":"P. Pauliš, Luboš Vrtiška, Z. Dolníček, Radana Malíková","doi":"10.46861/bmp.30.197","DOIUrl":"https://doi.org/10.46861/bmp.30.197","url":null,"abstract":"Two zeolites are described from the pyrite-manganese deposit Chvaletice near Přelouč, central Bohemia, Czech Republic. Ferrierite-Mg forms brown, up to 5 mm long flat needles, radially arranged, which grow on grey-brown fine-grained rock composed of quartz, pyrite and Mn-silicates. The unit-cell parameters of ferrierite-Mg, refined from the powder X-ray diffraction data, are a = 19.162(14), b = 14.125(13), c = 7.495(6) Å and V = 2028.8(9) Å3 (space group Immm). Chemical analyses correspond to the empirical formula (Mg2.66Ca0.44Mn0.41Fe0.30Ba0.29K0.16Na0.10Sr0.03)Σ4.39(Al7.77 Si27.96O72)·18 H2O. The Ba-rich heulandite forms aggregates up to several cm in size composed of transparent gold-brown grains with characteristic pearly luster at cleavage planes. The unit-cell parameters of heulandite, refined from the powder X-ray diffraction data, are a = 17.732(2), b = 17.823(4), c = 7.4290(15) Å, β = 116.3(2) ° and V = 2104.2(6) Å3 (space group Cm). In BSE images, its aggregates are not homogenous. Ba-poor part of analyses corresponds to heulandite-Ca and heulandite-K, Ba-rich part beside Ca- and K-dominant members also to very rare heulandite-Ba. Both studied zeolites contain a significant content of Mn, ranging between 0.32 - 0.70 apfu (ferrierite-Mg) and 0.09 - 0.28 apfu (Ba-rich heulandite).","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70600164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Pauliš, Luboš Vrtiška, Z. Dolníček, J. Sejkora, Bohuslav Bureš, Radana Malíková, Ondřej Pour
At the Ag-Pb-Zn deposit Hříva near Louňovice pod Blaníkem (Central Bohemian Region, Czech Republic), supergene mineralization with relatively abundant samples of coronadite, pyromorphite and hinsdalite was newly detected. Coronadite forms black to several mm thick crusts on quartz vein or hinsdalite crusts. Coronadite is monoclinic, space group I2/m, the unit-cell parameters refined from X-ray powder diffraction data are: a 9.946, b 2.866(2), c 9.839 Å, β 90.34(2)° and V 280.4(4) Å3. Chemical analyses of coronadite correspond to the empirical formula (Pb1.32Na0.05Co0.03Ba0.02K0.01Ca0.01Mg0.01)Σ1.45Mn4+5.25(Mn3+1.95Al0.38Cu0.30 Fe0.08Si0.02Zn0.01P0.01)Σ2.74 (O15.82F0.17mCl0.01)Σ16 calculated on the basis (Mn+Fe+Al+Cu+Zn+Si+P) = 8 apfu. Pyromorphite occurs there as white to creamy crusts up to 2 mm thick. Its empirical formula calculated on the basis P+As = 3 apfu is Ca0.04Pb5.04[(PO4)2.98(AsO4)0.02]Σ3.00Cl1.14. Most interesting is relatively rare hinsdalite, which forms light green to blue-green crystalline crusts up to 0.1 mm thick on quartz or pyromorphite. Hinsdalite is trigonal, space group R-3m, the unit-cell parameters refined from X-ray powder diffraction data are: a 7.002(6), c 16.807(7) Å and V 713.6(7) Å3. Chemical analyses of hinsdalite correspond to the empirical formula Pb1.06Al2.73Cu0.11 [(PO4)1.18(SO4)0.82]Σ2.00(OH)6.36 on the basis P+S+As = 2 apfu.
在捷克共和国中波希米亚地区Louňovice pod Blaníkem附近的银铅锌矿Hříva，新发现了具有相对丰富的冠状辉石、辉闪石和欣斯达尔石样品的表生成矿作用。冕状岩在石英脉或玄武岩壳上形成黑色至几毫米厚的结壳。Coronadite为单斜晶，空间群为I2/m，根据x射线粉末衍射数据细化的晶胞参数为:a 9.946, b 2.866(2)， c 9.839 Å， β 90.34(2)°和V 280.4(4) Å3。根据(Mn+Fe+Al+Cu+Zn+Si+P) = 8 apfu计算得到经验式(Pb1.32Na0.05Co0.03Ba0.02K0.01Ca0.01Mg0.01)Σ1.45Mn4+5.25(Mn3+1.95Al0.38Cu0.30Fe0.08Si0.02Zn0.01P0.01)Σ2.74 (O15.82F0.17mCl0.01)Σ16。焦闪石以白色或奶油状结壳的形式出现，厚度可达2毫米。根据P+As = 3 apfu计算得到的经验公式为Ca0.04Pb5.04[(PO4)2.98(AsO4)0.02]Σ3.00Cl1.14。最有趣的是相对罕见的欣斯戴利石，它在石英或焦闪石上形成浅绿色到蓝绿色的结晶外壳，厚度可达0.1毫米。Hinsdalite是三角形的，空间群R-3m，根据x射线粉末衍射数据改进的单位胞参数为:a 7.002(6)， c 16.807(7) Å和V 713.6(7) Å3。在P+S+As = 2 apfu的基础上，水杨石的化学分析公式为Pb1.06Al2.73Cu0.11 [(PO4)1.18(SO4)0.82]Σ2.00(OH)6.36。
{"title":"Supergenní mineralizace hydrotermálního Ag-Pb-Zn ložiska Hříva u Louňovic pod Blaníkem (Česká republika)","authors":"P. Pauliš, Luboš Vrtiška, Z. Dolníček, J. Sejkora, Bohuslav Bureš, Radana Malíková, Ondřej Pour","doi":"10.46861/bmp.30.124","DOIUrl":"https://doi.org/10.46861/bmp.30.124","url":null,"abstract":"At the Ag-Pb-Zn deposit Hříva near Louňovice pod Blaníkem (Central Bohemian Region, Czech Republic), supergene mineralization with relatively abundant samples of coronadite, pyromorphite and hinsdalite was newly detected. Coronadite forms black to several mm thick crusts on quartz vein or hinsdalite crusts. Coronadite is monoclinic, space group I2/m, the unit-cell parameters refined from X-ray powder diffraction data are: a 9.946, b 2.866(2), c 9.839 Å, β 90.34(2)° and V 280.4(4) Å3. Chemical analyses of coronadite correspond to the empirical formula (Pb1.32Na0.05Co0.03Ba0.02K0.01Ca0.01Mg0.01)Σ1.45Mn4+5.25(Mn3+1.95Al0.38Cu0.30 Fe0.08Si0.02Zn0.01P0.01)Σ2.74 (O15.82F0.17mCl0.01)Σ16 calculated on the basis (Mn+Fe+Al+Cu+Zn+Si+P) = 8 apfu. Pyromorphite occurs there as white to creamy crusts up to 2 mm thick. Its empirical formula calculated on the basis P+As = 3 apfu is Ca0.04Pb5.04[(PO4)2.98(AsO4)0.02]Σ3.00Cl1.14. Most interesting is relatively rare hinsdalite, which forms light green to blue-green crystalline crusts up to 0.1 mm thick on quartz or pyromorphite. Hinsdalite is trigonal, space group R-3m, the unit-cell parameters refined from X-ray powder diffraction data are: a 7.002(6), c 16.807(7) Å and V 713.6(7) Å3. Chemical analyses of hinsdalite correspond to the empirical formula Pb1.06Al2.73Cu0.11 [(PO4)1.18(SO4)0.82]Σ2.00(OH)6.36 on the basis P+S+As = 2 apfu.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70600213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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