Item talk:Q162687
From geokb
Mindat Short Description
Compare "chalcodite".
May be confused with "biotite" and other brownish mica, also with dark chlorite.
Geoscience Ontology Status Notes
Glocker E F, (1827) Beschreibung des Stilpnomelan, eines neuen schlesischen Fossils, in Beyträge zur Mineralogischen Kenntniss der Sudetenländer Insbesondere Schlesiens, Josef Mar und Komp (Breslau) 68-74
IMA Formula (from Mindat)
(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
RRUFF Formula (from Geoscience Ontology)
(K,Ca,Na)(Fe2+,Mg,Al,Fe3+)8(Si,Al)12(O,OH)36·nH2O
