Category Nesosilicate Formula mass 490.11 Crystal habit Granular | Strunz classification 09.AF.85 Color Pistachio green | |
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Formula(repeating unit) (Mn,Fe,Mg)2Al4Si2O10(OH)4 | ||
Ottrelite is a form of chloritoid. Its empirical formula is (Mn,Fe,Mg)2Al4Si2O10(OH)4.
References
Ottrelite Wikipedia(Text) CC BY-SA