Item talk:Q162423
Mindat Short Description
Amphibole Group. Mg-Fe-Mn-Li Clino-Amphibole Subgroup. Cummingtonite-Grunerite Series.
The original description of the mineral in 1847 incorrectly determined it to be a pyroxene.
Geoscience Ontology Status Notes
Kenngott A (1853) VIII. Ordnung: Spathe. IX. Geschlecht: Augit-Spathe. 4. Grunerit, in Das Mohs'sche Mineralsystem, Verlag und Druck (Wien) 62-77 Redefined: Leake B E, Woolley A R, Arps C E S, Birch W D, Gilbert M C, Grice J D, Hawthorne F C, Kato A, Kisch H J, Krivovichev V G, Linthout K, Laird J, Mandarino J A, Maresch W V, Nickel E H, Rock N M S, Schumacher J C, Smith D C, Stephenson N C N, Ungaretti L, Whittaker E J W, Youzhi G (1997) Nomenclature of amphiboles: Report of the subcommittee on amphiboles of the International Mineralogical Association, commission on new minerals and mineral names, The Canadian Mineralogist 35, 219-246
IMA Formula (from Mindat)
◻Fe2+2Fe2+5Si8O22(OH)2
RRUFF Formula (from Geoscience Ontology)
Fe2+2Fe2+5Si8O22(OH)2
