Formula: (Zn,Fe,Fe)3(AsO4)2 . 8(H2O,OH)
Origin of name: From Greek meta - after and köttigite
Crystal system: Triclinic
Crystal class: -1
Twinning: On {110}
Unit cell: a = 7.96 Å, b = 9.44 Å, c = 4.72 Å, α = 95.6°, β = 97.0°, γ = 107.8°
Colour: Bluish-gray
Diaphaneity:
Luster:
Habit:
Hardness:
Specific gravity: 3.03
Cleavage: 1; {1-10} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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