Item talk:Q162183
From geokb
Mindat Short Description
Actinolite is an intermediate member Actinolite-Tremolite Series. Tremolite is defined as having an Mg/(Mg+Fe2+) ratio ≥ 0.9; actinolite has a ratio of 0.5–0.9 and ferro-actinolite has a ratio of less than 0.5. The name actinolite has been retained f...
Geoscience Ontology Status Notes
Originally named actynolite: Kirwan R (1794) 16th species: actynolite, in Elements of Mineralogy, 2nd Edition, Volume 1, Elmsly (London) 167-170
IMA Formula (from Mindat)
◻Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2
RRUFF Formula (from Geoscience Ontology)
Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2
