Formula: Ca3MnSb4O14
Origin of name: For H. Ingerson, American geologist
Crystal system: Hexagonal
Crystal class: 3m
Twinning:
Unit cell:
Colour: Brownish yellow
Diaphaneity: Transparent to translucent
Luster: Vitreous
Habit: Subhedral crystals 0.3 mm across in irregular aggregates 2-3 mm across
Hardness: 6.5
Specific gravity:
Cleavage: 1; {0001} perfect
Tenacity:
Streak: Brownish yellow
Synonyms/varieties:
Comments:
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