Item talk:Q162770
From geokb
Mindat Short Description
Fe2+-analogue of Coombsite.
Dark green micaceous mineral in stilpnomelane and quartz gneiss. A modulated phyllosilicate.
Geoscience Ontology Status Notes
Agrell S O, Bown M G, McKie D (1965) Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville District, Mendicino Co., California, American Mineralogist 50, 278-278
IMA Formula (from Mindat)
K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
RRUFF Formula (from Geoscience Ontology)
K(Fe2+,Mg,Mn2+,Fe3+)13(Si,Al)18O42(OH)14
