J. Sejkora, Petr Pauliš, L. Vrtiška, O. Pour, Z. Dvořák
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引用次数: 0
摘要
在波希米亚北部Krušné hory山Cínovec锡钨矿床废弃的Cínovec 1矿3层的材料中发现了一种非常罕见的菱辉石Cu3(MoO4)2(OH)2。这是捷克共和国首次发现这种矿物。菱辉石以橄榄绿色不规则涂层出现在面积达0.5 × 1厘米的区域,由直径达0.3毫米的半球形或球形聚集体形成,晶体表面与钙辉石相结合。Lindgrenite为单斜晶,空间群P21/n, x射线粉末衍射数据精化的晶胞参数为:a 5.3934(18), b 14.032(2), c 5.6098(15) Å, β 98.54(2)°和V 419.86(16) Å3。基于5个原子的pfu,对菱辉石的化学分析符合实验式(cu2.92 2fe0.03)Σ2.95(MoO4)1.97(PO4)0.07(AsO4)0.01(OH)1.70。其成因与原生Cu (tentenites)和Mo(辉钼矿)在地表生带条件下同时风化有关。
Lindgrenite, monoclinic Cu3(MoO4)(OH)2, from Cínovec, Krušné hory Mountains - the first occurrence
in the Czech Republic
A very rare mineral lindgrenite, Cu3(MoO4)2(OH)2, was found in material from the 3rd level of abandoned Cínovec mine 1 of the Cínovec Sn-W deposit, Krušné hory Mountains, northern Bohemia. This is the first occurrence of this mineral in the Czech Republic. Lindgrenite occurs there as olive green irregular coatings on the area up to 0.5 × 1 cm in size formed by hemispherical to spherical aggregates up to 0.3 mm across with crystalline surface in association with brochantite. Lindgrenite is monoclinic, space group P21/n, the unit-cell parameters refined from X-ray powder diffraction data are: a 5.3934(18), b 14.032(2), c 5.6098(15) Å, β 98.54(2)° and V 419.86(16) Å3. Chemical analyses of lindgrenite correspond to the empirical formula (Cu2.92Fe0.03)Σ2.95(MoO4)1.97(PO4)0.07(AsO4)0.01(OH)1.70 on the basis of 5 atoms pfu. Its origin is connected with simultaneous weathering of primary Cu (tennantite) and Mo (molybdenite) minerals in the conditions of supergene zone in-situ.
期刊介绍:
Bulletin Mineralogie Petrologie is a peer-reviewed journal focused especially on: mineralogy, crystal chemistry and study of crystal structures of minerals study of mineral associations and processes of their origin meteoritics, research of tectites economic geology (of ore deposits) and study of history of mining of ore deposits topographic mineralogy petrology of igneous, metamorphic and sedimentary rocks instrumental analytical methods at mineralogy and petrology mineralogy and petrology as tools for archeology and similar disciplines