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	 Ferroglaucophane Mineral Data  |  |  | 
   
| General Ferroglaucophane  Information  | 
|  Chemical  Formula: | [ ]Na2(Fe++3Al2)Si8O22(OH)2 | 
|  Composition: | Molecular Weight = 878.17 gm | 
|  | Sodium     5.24 %  Na    7.06 % Na2O | 
|  | Aluminum   6.14 %  Al   11.61 % Al2O3 | 
|  | Iron      19.08 %  Fe   24.54 % FeO | 
|  | Silicon   25.59 %  Si   54.74 % SiO2 | 
|  | Hydrogen   0.23 %  H     2.05 % H2O | 
|  | Oxygen    43.73 %  O | 
|  | ______        ______ | 
|  | 100.00 %      100.00 % = TOTAL OXIDE | 
|  Empirical Formula: | Na2Fe2+3Al2(Si8O22)(OH)2 | 
|  IMA Status: | Valid Species (Pre-IMA) 1957 | 
|  Locality: | Link to MinDat.org Location Data. | 
|  Name Origin: | Named as per current IMA amphibole nomenclature (Burke and Leake 2004; Can. Mineral., 42, 1881-1883). | 
|  Name Pronunciation: | Ferroglaucophane  + Pronunciation   | 
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