Formula: CaBSiO4(OH)
Origin of name: From Greek for to divide
Crystal system: Monocinic
Crystal class: 2/m
Twinning:
Unit cell: a = 9.62 Å, b = 7.60 Å, c = 4.84 Å, β = 90.2°
Colour: Colourless, white, pale yellowish, pale greenish, pinkish,
Luster: Vitreous
Habit: Crystals short prismatic; granular or porcelaneous compact masses
Hardness: 5 to 5.5
Specific gravity: 2.8 to 3.00
Cleavage: None
Tenacity: Conchoidal to uneven; brittle
Streak: Colourless
Synonyms/varieties:
Comments:
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