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Geography Categories
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| Definition Of: |
Johnwalkite
General Information: Chemical Formula:K(Mn++,Fe+++,Fe++)2(Nb,Ta)(PO4)2O2((H2O),OH)2 IMA Status:Approved IMA Physical Properties: Cleavage:[001] Good, [100] Good Color:dark reddish brown or reddish brown. Density:3.4 Diaphaniety:Transparent to Translucent Hardness:4 - Fluorite Luster:Vitreous (Glassy) Streak:greenish yellow More details...
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Mineralogy Dictionary INDEX:
List of Terms: Terms beginning with "A", Page 1 |
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Page Number:
1 2 3 4 A: Page 1 of 4.
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