Formula: Ca6(Cr,Al)2(SO4)3(OH)12 . 26H2O
Origin of name: For Y.K. Bentor, American geologist
Crystal system: Hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: Bright violet
Diaphaneity:
Luster: Vitreous
Habit: Crystals micro hexagonal prisms
Hardness: 2
Specific gravity: 2.025
Cleavage: 1; {10-10} perfect
Tenacity:
Streak: Pale-violet
Synonyms/varieties:
Comments:
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