THE CRYSTAL-STRUCTURE OF PINCHITE, HG5CL2O4

被引：0
|
作者：
HAWTHORNE, FC [1 ]
COOPER, M [1 ]
SENGUPTA, PK [1 ]
机构：
[1] MEMPHIS STATE UNIV,DEPT GEOL SCI,MEMPHIS,TN 38152
来源：
AMERICAN MINERALOGIST | 1994年 / 79卷 / 11-12期
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D O I：
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中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The crystal structure of pinchite, Hg5O4Cl2, a = 11.619(3), b = 6.105(2), c = 11.710(3) angstrom, V = 830.6(4) angstrom3, space group Ibam, has been solved by direct methods and refined to an R index of 3.0% using MoKalpha X-ray data. There are three distinct Hg positions: Hg1 is coordinated by two O and four Cl atoms in a distorted octahedral arrangement; Hg2 is coordinated by four O and two Cl atoms in a bi-diminished, Siamese dodecahedral arrangement; and Hg3 is coordinated by four O atoms in a distorted tetrahedral arrangement. The structure consists of layers of HgCl and Hg3O4 composition and is closely related to the structure of terlinguaite, Hg2+Hg2(2+)O2Cl2.
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页码：1199 / 1203
页数：5
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