ATHENA MINERALOGY |
Mineral: | GRUNERITE |
---|---|
Formula: | ▢Fe2+7Si8O22(OH)2 |
Crystal System: | Monoclinic |
Group: | Amphibole supergroup, with (OH,F,Cl) dominant. Mg-Fe-Mn subgr. Gedrite group |
IMA Number: | 2012 s.p. |
References: | HB2/1 (1995); Physics and Chemistry of Minerals 46 (2019), 215 |
Type Locality: | Collobrières, Var, France |
Comments: | ▢ = vacancy |
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