Item talk:Q162344
Mindat Short Description
Cummingtonite-Grunerite Series.
Geoscience Ontology Status Notes
Dewey C (1824) A sketch of the geology and mineralogy of the western part of Massachusetts, and a small part of the adjoining states, The American Journal of Science and Arts 8, 1-60 Redefined by IMA nomenclature commission: 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)
◻Mg2Mg5Si8O22(OH)2
RRUFF Formula (from Geoscience Ontology)
Mg7Si8O22(OH)2