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Olmsteadite

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SHS201831

Olmsteadite

Description Tabs

Description
Locality: 
Big Chief Mine, Keystone, Glendale, Pennington County, South Dakota, United States of America
Size Range: 
Micromount (under 1cm)
Size: 
0.1 × 0.1 × 0.1 cm
Description

 Olmsteadite in capsula

Mineral Data
What's on the rock

Olmsteadite

Formula: 
KFe2+2(Nb5+,Ta5+)(PO4)2O2·2H2O
Strunz: 
8.DJ.05
Hardness: 
4.0
Type Locality: 
Big Chief Mine (Johnson pegmatite), Glendale, Keystone District, Pennington Co., South Dakota, USA