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	 Ziesite Mineral Data  |  |  | 
   
| General Ziesite  Information  | 
|  Chemical  Formula: | Cu2V+++++2O7 | 
|  Composition: | Molecular Weight = 340.97 gm | 
|  | Vanadium  29.88 %  V    53.34 % V2O5 | 
|  | Copper    37.27 %  Cu   46.66 % CuO | 
|  | Oxygen    32.85 %  O | 
|  | ______        ______ | 
|  | 100.00 %      100.00 % = TOTAL OXIDE | 
|  Empirical Formula: | Cu2V5+2O7 | 
|  Environment: | Polymorphic with blossite. | 
|  IMA Status: | Approved IMA 1973 | 
|  Locality: | Izalco volcano, El Salvador. Link to MinDat.org Location Data. | 
|  Name Origin: | Named for Emanuel G. Sies (1884-1981), Geophysical Laboratory, Carnegie Institution, Washington D.C. USA. | 
|  Name Pronunciation: | Ziesite   | 
|  Synonym: | ICSD 23479 | 
|  | PDF 26-569 | 
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