Formula: Ca3B4(OH)18
Origin of name: for Y. OLshanskii, Russian geochemist
Crystal system: triclinic
Crystal class: unknown
Twinning: polysynthetic
Unit cell:
Colour: colourless
Diaphaneity:
Luster:
Habit: crystals 0.02 to 0.03 mm, polysynthetic twinning, in transverse-fibrous aggregates
Hardness: 4
Specific gravity: 2.23
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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