Formula: CaHPO4 . 2H2O
Origin of name: For G. Bush, American mineralogist
Crystal system: Monoclinic
Crystal class: m
Colour: Colourless to ivory-yellow
Diaphaneity: Transparent to translucent
Luster: Vitreous, pearly on cleavage
Habit: Crystals acicular or prismatic; earthy, powdery, foliated, cryptocrystalline, paste-like aggregates of platy crystals 0.6-0.8 mm
Hardness: 2.5
Specific gravity: 2.328
Cleavage: 2; {010} and {001} perfect
Synonyms/varieties:
Comments:
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