Formula: CaB6O9(OH)2.3H2O
Origin of name: for Levi, Noble, American geologist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 14.56 Å, b = 8.02 Å, c = 9.84 Å, b = 111.7°
Colour: colourless
Diaphaneity: transparent
Luster: subvitreous, pearly on cleavage
Habit: crystals platy, euhedral, large crystals have hexagonal aspect, small crystals rhomb-shaped, mammilary coatings
Hardness: 3
Specific gravity: 2.09
Cleavage: 2; {100} perfect, {001} indistinct
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
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