Item talk:Q162687

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

Additional References

• http://www.handbookofmineralogy.com/pdfs/stilpnomelane.pdf

• http://www.webmineral.com/data/Stilpnomelane.shtml