Formula: K6Al4Si6BO20(OH)4Cl
Origin of name: Combination of element names
Crystal system: Tetragonal
Crystal class: -42m
Twinning:
Unit cell:
Colour: Colourless, slight rose-brownish tint, pinkish tint
Diaphaneity:
Luster: Vitreous to pearly
Habit: Grains to 1 ~ 2 mm
Hardness: 6
Specific gravity: 2.5
Cleavage: 1; {110} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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