Formula: CaMgB6O8(OH)6 . 3H2O
Origin of name: From Greek hydor - water and boracite
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 11.77 Ǻ, b = 6.68 Ǻ, c = 8.24 Ǻ, β = 102.6°
Colour: Colourless, white, light brown to greenish
Diaphaneity:
Luster: Vitreous
Habit: Crystals long prismatic or acicular, elongated parallel to c-axis; massive, compact and fine-grained; lamellar-fibrous
Hardness: 2 to 3
Specific gravity: 2. 17
Cleavage: 1; {010} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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