cummingtonite

(ˈkʌmɪŋtəˌnaɪt)

an amphibole mineral, magnesium iron silicate hydroxide, found in metamorphic rocks

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References in periodicals archive

Subsolidus alteration is manifested by the formation of a secondary paragenesis mainly consisting of chlorite, sericite and a secondary green--to colourless amphibole (Mg-hornblende to actinolite and cummingtonite) at the expense of the primary minerals.

Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas

Dominant primary manganese minerals include spessartine, tephroite, rhodonite, pyroxmangite, neotocite, bementite, Mn-rich cummingtonite, rhodochrosite and Mn-rich apatite (Pires, 1977, 1983).

Ca-Mg-Fe-rich rhodonite from the Morro da Mina mine, Conselheiro Lafaiete, Minas Gerais, Brazil

Cummingtonite [(Mg,Fe).sub.7][Si.sub.8][O.sub.22][(OH).sub.2]

Famous Mineral Localities: DAL'NEGORSK PRIMORSKIY KRAY RUSSIA

35 (1997), (= cummingtonite) 219 Magnesio-gedrite (= gedrite) Leake et al.: Can.

The IMA Commission on New Minerals and Mineral Names: Procedures and Guidelines on Mineral Nomenclature 1998

with Cummingtonite, forms a series with Ferro-anthophyllite, Amphibole group, Can.

The second list of additions and corrections to the Glossary of Mineral Species (1995)

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