Formula: Na(Mn,Mg,Fe)12Si12(O,OH)44
Origin of name: after locality Taneyama mine, Japan
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 10.198, b = 9.82, c = 9.485, α = 90.5°, β = 70.53°, γ = 108.57°
Colour: Greenish gray-yellow
Diaphaneity: Translucent
Luster: Vitreous
Habit: Small seams, acicular, flakes
Hardness: 5 to 6
Specific gravity: 3.30
Cleavage: 1; {010} perfect
Tenacity:
Streak: Light yellow
Synonyms/varieties:
Comments:
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