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| 副硫锑钴矿(CoSbS)的晶体结构 | |
| 引用本文： | 武汉地质学院X光实验室,桂林冶金地质研究所岩矿室,湖北地质科学研究所X光组.副硫锑钴矿(CoSbS)的晶体结构[J].地质科学,1976,11(3):227-234. |
| 作者姓名： | 武汉地质学院X光实验室 桂林冶金地质研究所岩矿室 湖北地质科学研究所X光组 |
| 作者单位： | 1. 武汉地质学院X光实验室; 2. 桂林冶金地质研究所岩矿室; 3. 湖北地质科学研究所X光组 |
| 摘 要： | 副硫锑钴矿是硫锑钴矿(CoSbS)的一个同质多象变体。1970年由卡布里(L. J. Cabri)等人发现于加拿大安大略州,他们对该矿物进行了化学分析及X射线粉晶分析等研究。测得该矿物属斜方晶系,a=5.764,b=5.952,c=11.635,空间群为Pbca,Z=8。 |
| 关 键 词： | , |
THE CRYSTAL STRUCTURE OF PARACOSTIBITE |
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| X-Ray Laboratory,Wuhan Geologic College Laboratory of Mineralogy andPetrology,Guilin Institute of Metallurgy and GeologyX-Ray, . Group of the Hubei Institute of Geology.THE CRYSTAL STRUCTURE OF PARACOSTIBITE[J].Chinese Journal of Geology,1976,11(3):227-234. |
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| Authors: | X-Ray Laboratory Wuhan Geologic College Laboratory of Mineralogy andPetrology Guilin Institute of Metallurgy and GeologyX-Ray Group of the Hubei Institute of Geology |
| Institution: | 1. X-Ray Laboratory, Wuhan Geologic College Laboratory of Mineralogy andPetrology; 2. Guilin Institute of Metallurgy and GeologyX-Ray; 3. Group of the Hubei Institute of Geology |
| Abstract: | The X-ray single crystal diffraction of paracostibite (a polymorphic species of costibite) from a certain locality in Guangdong province has been studied. The mineral belongs to the orthorhombic system, with a = 5.81A: b = 5.96A; c = 11.71A and space group Pbca. Its molecular formula has been found to be Co1.00 Sb0.94 S1.00, z=8.The crystal structure was obtained by using Patterson function analysis and electron density distribution function. The atomic coordinates were revised by the methods of the least square and optimization and then the R factors were decreased to R(hk0) = 12.52% ; R(h01) = 16.94% respectively. The atomic coordinate parameters were measured to beCo: x = 0.014, y = 0.173, z = 0.386; Sb: x = 0.118, y = 0.050, z = 0.180; S: x = 0.366, y = 0.302, z = 0.436.The basic structural unit is a double octahedron consisting of two Co-Sb, S octahedrons having a common edge S-S. The double octahedrons are connected by vertices. Sb and S are linked to SbS]3- pairs by covelent bond, the length of which is 2.482A.Through the crystal analysis, it is clear that paracostibite and parammelsbergite are of the same structure. Both of them belong to the transitional structures between pyrite and marcasite.The explanation of the crystal structure of paracostibite is important to the crystal chemical classifications of disulfides and stibno-sulfides as well as to the research of polymorphism of costibite. |
| Keywords: | , |
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