Formula: Ca4MgB4O6(OH)6(CO3)2
Origin of name: From composition, a borate-carbonate
Crystal system: Triclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Greenish blue to bluish green, nearly colourless
Diaphaneity:
Luster: Vitreous to slightly pearly on cleavage
Habit: Dense masses
Hardness: 4
Specific gravity: 2.77
Cleavage: 2; {100} perfect, {110} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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