The crystal structure of magnesiozippeite, Mg[(UO2)(2)O-2(SO4)](H2O)(3.5), from East Saddle Mine, San Juan County, Utah (USA)
| Authors | |
|---|---|
| Year of publication | 2013 |
| Type | Article in Periodical |
| Magazine / Source | Mineralogy and Petrology |
| MU Faculty or unit | |
| Citation | |
| Doi | http://dx.doi.org/10.1007/s00710-012-0241-7 |
| Field | Geology and mineralogy |
| Keywords | magnesiozippeite; crystal structure |
| Description | The crystal structure of natural magnesiozippeite, Mg[(UO2)(2)O-2(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 R (obs) = 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), beta = 104.408(5)A degrees, V = 1062.24(9) (3) and Z = 4. The structure consists of the structural sheets of zippeite topology, represented by a structure unit [(UO2)(2)O-2(SO4)](2-), and an interlayer where two Mg2+ I broken vertical bar(6) 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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