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Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.

VS
Johnwalkite
Name
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K(Mn²⁺,Fe³⁺)₂(Nb,Ta)O₂(PO₄)₂·2(H₂O,OH)
Formula
—
Mineral Species
Entry type
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Phosphates
Chemical class
—
Orthorhombic
Crystal system
—
—
Mohs hardness
—
—
Specific gravity
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Medium greenish yellow
Streak
—
Vitreous
Luster
—
—
Cleavage
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Pb2_1m
Space group
—
—
Structural group
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Jwk · Approved
IMA
—
1985
Named in
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Very dark reddish brown
Typical colors
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K · Mn · Fe · Nb · Ta · O · P · H
Elements
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