Formula: CaB6O8(OH)4 . 3H2O
Origin of name: For H. Gower, American mining executive
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 11.03 Ǻ, b = 16.40 Ǻ, c = 6.58 Ǻ, β = 90.9°
Colour: Colourless, white
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals long prismatic to acicular, in radiating globular clusters
Hardness: 3
Specific gravity: 2.0
Cleavage: 2; {001} distinct, {100} imperfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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