|  |  | 
	 Copiapite Mineral Data  |  |  | 
   
| General Copiapite  Information  | 
|  Chemical  Formula: | Fe++Fe+++4(SO4)6(OH)2•20(H2O) | 
|  Composition: | Molecular Weight = 1,249.94 gm | 
|  | Iron      22.34 %  Fe    5.75 % FeO / 25.55 % Fe2O3 | 
|  | Hydrogen   3.39 %  H    30.27 % H2O | 
|  | Sulfur    15.39 %  S    38.43 % SO3 | 
|  | Oxygen    58.88 %  O | 
|  | ______        ______ | 
|  | 100.00 %      100.00 % = TOTAL OXIDE | 
|  Empirical Formula: | Fe2+Fe3+4(SO4)6(OH)2•20(H2O) | 
|  Environment: | Oxidized iron sulfide deposits. | 
|  IMA Status: | Valid Species (Pre-IMA) 1833 | 
|  Locality: | Copiapo, Chile. Link to MinDat.org Location Data. | 
|  Name Origin: | Named after its locality. | 
|  Name Pronunciation: | Copiapite  + Pronunciation   | 
|  Synonym: | ICSD 10276 | 
|  | Janosite | 
|  | Misy | 
|  | PDF 35-583 | 
|  |