Compare Minerals
Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.
Name
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[Na(NH₄,K)₉Cl₄][V⁵⁺,⁴⁺₂(P,As)O₈]₆·n[H₂O,Na,NH₄,K,Cl]
Formula
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Mineral Species
Entry type
—
Halides
Chemical class
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Cubic
Crystal system
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2
Mohs hardness
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2.23
Specific gravity
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Brownish green
Streak
—
Vitreous
Luster
—
None
Cleavage
—
Fd-3m
Space group
—
—
Structural group
—
Rwl · Approved
IMA
—
2016
Named in
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Dark brownish green (appearing black); red-brown with olive-green rims in transmitted light
Typical colors
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Na · N · H · K · Cl · V · P · As · O
Elements
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