Pub Date : 1998-01-01DOI: 10.1016/S0992-4361(98)80015-5
O. Tougait, M. Potel, J.C. Levet, H. Noël
Single crystals of U2Te3 were obtained by solid state reaction between the elements in stoichiometric proportions mixed with a small quantity of cesium chloride. U2Te3 crystallizes in the orthorhombic system, space group Pnma (no 62), with unit cell parameters a = 12.175(2)Å, b = 4.370(1)Å, c = 11.828(2)Å, and Z = 4. The structure was determined from single crystal X-ray diffraction data and refined to final residual factors R(F) = 0.030 and Rω(F) = 0.035 for 32 variable parameters and a unique data set of 1100 diffraction intensities [I > 3σ(I)]. The U atoms are located on two 4c non equivalent crystallographic positions. U(1) has a 7-fold coordination of Te atoms with a coordination polyhedron deriving from an octahedron in which one apex is split into two positions, and U(2) has a monocapped trigonal prismatic coordination. U2Te3 exhibits rather complex magnetic behaviour, with an onset of ferromagnetic order at T ∼ 110 K and spin reorientation below 105 K.
以一定量的氯化铯与这些元素按化学计量比例进行固相反应,制得U2Te3单晶。U2Te3在正交体系中结晶,空间群Pnma (no . 62),晶胞参数a = 12.175(2)Å, b = 4.370(1)Å, c = 11.828(2)Å, Z = 4。根据单晶x射线衍射数据确定结构,并对32个可变参数和1100个衍射强度的唯一数据集进行细化,最终残余因子R(F) = 0.030和Rω(F) = 0.035 [I >3σ(我)]。U原子位于两个4c不等效的晶体位置上。U(1)具有7倍Te原子配位,其配位多面体由一个顶点被分成两个位置的八面体衍生而来,U(2)具有单端三角棱柱配位。U2Te3表现出相当复杂的磁性行为,在T ~ 110 K时铁磁有序开始,在105 K以下自旋重定向。
{"title":"Crystal structure and magnetic properties of the diuranium tritelluride U2Te3","authors":"O. Tougait, M. Potel, J.C. Levet, H. Noël","doi":"10.1016/S0992-4361(98)80015-5","DOIUrl":"10.1016/S0992-4361(98)80015-5","url":null,"abstract":"<div><p>Single crystals of U<sub>2</sub>Te<sub>3</sub> were obtained by solid state reaction between the elements in stoichiometric proportions mixed with a small quantity of cesium chloride. U<sub>2</sub>Te<sub>3</sub> crystallizes in the orthorhombic system, space group Pnma (n<sup>o</sup> 62), with unit cell parameters a = 12.175(2)Å, b = 4.370(1)Å, c = 11.828(2)Å, and Z = 4. The structure was determined from single crystal X-ray diffraction data and refined to final residual factors R(F) = 0.030 and Rω(F) = 0.035 for 32 variable parameters and a unique data set of 1100 diffraction intensities [I > 3σ(I)]. The U atoms are located on two 4c non equivalent crystallographic positions. U(1) has a 7-fold coordination of Te atoms with a coordination polyhedron deriving from an octahedron in which one apex is split into two positions, and U(2) has a monocapped trigonal prismatic coordination. U<sub>2</sub>Te<sub>3</sub> exhibits rather complex magnetic behaviour, with an onset of ferromagnetic order at T ∼ 110 K and spin reorientation below 105 K.</p></div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 1","pages":"Pages 67-76"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80015-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75327262","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}
Pub Date : 1998-01-01DOI: 10.1016/S0992-4361(98)80010-6
R. Burlot, M. Ferriol, R. Moncorgé, G. Boulon
The growth of LiTaO3 single-crystal fibers by the Laser Heated Pedestal Growth technique was performed using different pulling rates and growth atmosphere pressures. Fibers were produced with a diameter of about 800 μm and lengths between 20 and 50 mm. Due to the high melting point of LiTaO3, incongruent evaporation of lithium oxide took place during the growth. Its influence on the morphology of the crystals obtained was characterized by transmission optical microscopy and an estimate of the evaporation time constant of Li2O made.
{"title":"Li20 evaporation during the laser heated pedestal growth of LiTaO3 single-crystal fibers","authors":"R. Burlot, M. Ferriol, R. Moncorgé, G. Boulon","doi":"10.1016/S0992-4361(98)80010-6","DOIUrl":"10.1016/S0992-4361(98)80010-6","url":null,"abstract":"<div><p>The growth of LiTaO<sub>3</sub> single-crystal fibers by the Laser Heated Pedestal Growth technique was performed using different pulling rates and growth atmosphere pressures. Fibers were produced with a diameter of about 800 μm and lengths between 20 and 50 mm. Due to the high melting point of LiTaO<sub>3</sub>, incongruent evaporation of lithium oxide took place during the growth. Its influence on the morphology of the crystals obtained was characterized by transmission optical microscopy and an estimate of the evaporation time constant of Li<sub>2</sub>O made.</p></div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 1","pages":"Pages 1-8"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80010-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82810215","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}
(SnS)1.20TiS2 and (PbS)1.18TiS2 are misfit layer compounds, built of alternate double layers SnS (PbS), actually a slightly distorted {001} slice of rocksalt type SnS (PbS), and sandwiches TiS2, slightly distorted compared to those of 1T-TiS2. The electrical transport properties, measured on single crystals for the in-plane resistivity (rho-ab), the resistivity along c (rho-c) and Hall coefficient (R(H)) and on powder compacts for the Seebeck coefficient (alpha) are metallic like those of 1T-TiS2 intercalated with an electron donating species. The rho-ab versus temperature curves are non-linear from 4 to 300 K. R(H) and alpha are negative for both compounds. The Hall coefficients at 300 K correspond with 0.20 +/- 0.04 e/Ti for (SnS)1.20TiS2 and 0.43 +/- 0.09 e/Ti for (PbS)1.18TiS2. The Seebeck coefficients point to 0.2 - 0.4 e/Ti.
{"title":"Electrical Transport Properties of the Misfit Layer Compounds (SnS)1. 20TiS2 and (PbS)1.18TiS2","authors":"G. Wiegers, R. Haange","doi":"10.1002/CHIN.199145021","DOIUrl":"https://doi.org/10.1002/CHIN.199145021","url":null,"abstract":"(SnS)1.20TiS2 and (PbS)1.18TiS2 are misfit layer compounds, built of alternate double layers SnS (PbS), actually a slightly distorted {001} slice of rocksalt type SnS (PbS), and sandwiches TiS2, slightly distorted compared to those of 1T-TiS2. The electrical transport properties, measured on single crystals for the in-plane resistivity (rho-ab), the resistivity along c (rho-c) and Hall coefficient (R(H)) and on powder compacts for the Seebeck coefficient (alpha) are metallic like those of 1T-TiS2 intercalated with an electron donating species. The rho-ab versus temperature curves are non-linear from 4 to 300 K. R(H) and alpha are negative for both compounds. The Hall coefficients at 300 K correspond with 0.20 +/- 0.04 e/Ti for (SnS)1.20TiS2 and 0.43 +/- 0.09 e/Ti for (PbS)1.18TiS2. The Seebeck coefficients point to 0.2 - 0.4 e/Ti.","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"58 24 1","pages":"1071-1078"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86544665","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}
The Sol-Gel technique is used to prepare powder and densified ceramic of BaTiO 3 . The experimental conditions (precursors, hydrolysis, heat treatment) for the preparation of a powder, suitable for sintering onto a product of high dielectric constant and weak loss tangent, are studied. The characteristics of the ceramic as a fonction of the sintering temperature are also reported
{"title":"Barium titanate by the sol-gel process","authors":"A. Larbot, F. García, C. Guizard","doi":"10.1002/CHIN.198950336","DOIUrl":"https://doi.org/10.1002/CHIN.198950336","url":null,"abstract":"The Sol-Gel technique is used to prepare powder and densified ceramic of BaTiO 3 . The experimental conditions (precursors, hydrolysis, heat treatment) for the preparation of a powder, suitable for sintering onto a product of high dielectric constant and weak loss tangent, are studied. The characteristics of the ceramic as a fonction of the sintering temperature are also reported","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"50 1","pages":"327-337"},"PeriodicalIF":0.0,"publicationDate":"1989-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84204132","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}
{"title":"On trigonal weberites: structure refinements of Na2MnC1F7 and Na2MnGaF7","authors":"G. Courbion, G. Férey, H. Holler, D. Babel","doi":"10.1002/CHIN.198914008","DOIUrl":"https://doi.org/10.1002/CHIN.198914008","url":null,"abstract":"","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"14 1","pages":"435-447"},"PeriodicalIF":0.0,"publicationDate":"1989-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87803144","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}
{"title":"Na2SiF6 and ordered trirutile-types: crystal and magnetic structure of α- and β-LiMnVF6","authors":"G. Courbion, C. Jacoboni, P. Wolfers","doi":"10.1002/CHIN.198913004","DOIUrl":"https://doi.org/10.1002/CHIN.198913004","url":null,"abstract":"","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"27 1","pages":"359-374"},"PeriodicalIF":0.0,"publicationDate":"1989-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83443358","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}
{"title":"Synthesis and study of sodium hydroxi-cuprate: Na2Cu (OH)4 and copper hydroxide: Cu(OH)2","authors":"Y. Cudennec, A. Lecerf, A. Riou, Y. Gérault","doi":"10.1002/CHIN.198913003","DOIUrl":"https://doi.org/10.1002/CHIN.198913003","url":null,"abstract":"","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"20 1","pages":"351-358"},"PeriodicalIF":0.0,"publicationDate":"1989-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74380718","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. Durand, M. Loukili, N. Tijani, M. Rafiq, L. Cot
{"title":"New lanthanide hydrogen phosphites LnH(PO3H)2 2H2O","authors":"J. Durand, M. Loukili, N. Tijani, M. Rafiq, L. Cot","doi":"10.1002/CHIN.198912008","DOIUrl":"https://doi.org/10.1002/CHIN.198912008","url":null,"abstract":"","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"1 1","pages":"297-303"},"PeriodicalIF":0.0,"publicationDate":"1989-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80573716","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}
{"title":"The layered compounds AMv(PO4)2 (A=K, Rb, Cs and M=Sb, Nb, Ta)","authors":"S. Oyetola, A. Verbaere, Y. Piffard, M. Tournoux","doi":"10.1002/CHIN.198912005","DOIUrl":"https://doi.org/10.1002/CHIN.198912005","url":null,"abstract":"","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"260 1","pages":"259-278"},"PeriodicalIF":0.0,"publicationDate":"1989-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77675362","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}
{"title":"NMR Study of the intermetallic phase Li2Ga7","authors":"M. Tillard-Charbonnel, C. Belin, M. Herzog-Cance","doi":"10.1002/CHIN.198912018","DOIUrl":"https://doi.org/10.1002/CHIN.198912018","url":null,"abstract":"","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"45 1","pages":"329-340"},"PeriodicalIF":0.0,"publicationDate":"1989-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83649727","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}