The crystal structure of magnesiozippeite, Mg[(UO2)2O2(SO4)](H2O)3.5, from East Saddle Mine, San Juan County, Utah (U.S.A.)

被引：0
|
作者：
Jakub Plášil
Karla Fejfarová
Radek Škoda
Michal Dušek
Joe Marty
Jiří Čejka
机构：
[1] Institute of Physics ASCR,Department of Geological Sciences
[2] Masaryk University,Department of Mineralogy and Petrology
[3] National Museum,undefined
来源：
Mineralogy and Petrology | 2013年 / 107卷
关键词：
Crystal Structure Refinement; Twin Domain; Lucky Strike; Twin Volume Fraction; Tricarbonate;
D O I：
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摘要：
The crystal structure of natural magnesiozippeite, Mg[(UO2)2O2(SO4)](H2O)3.5, from East Saddle mine, San Juan County, U.S.A., has been determined by single-crystal X-ray diffraction analysis and refined to Robs = 0.0348. The mineral is monoclinic, crystallizing in the space group C2/m, with unit cell parameters a = 8.7005(5), b = 14.2541(6), c = 8.8433(5)Å, β = 104.408(5)°, V = 1062.24(9) Å3 and Z = 4. The structure consists of the structural sheets of zippeite topology, represented by a structure unit [(UO2)2O2(SO4)]2−, and an interlayer where two Mg2+ Φ6 octahedra are located. The crystal structure of natural magnesiozippeite shows considerable differences to the structure of previously reported synthetic analogue, namely in coordination of Mg2+ in the interlayer.
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页码：211 / 219
页数：8
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