Formula: Ca2Be4(PO4)3(OH)3.5H2O
Origin of name: after locality, Boyevka, Ural Mountains, Russia
Crystal system: Monoclinic
Crystal class: 2/m
Twinning: May show multiple twinning
Unit cell: a = 6.55, b = 16.005, c = 15.969, β = 101.64°
Colour: Colourless to white, brownish white
Diaphaneity: Transparent to translucent
Luster: Silky for fibrous aggregates, vitreous, subadamantine
Habit: Radiating fibrous spherulites, 2 to 3 mm forming concretions, sheaf-like growths, bladed crystals elongated and striated || [100]
Hardness: 2.5
Specific gravity: 2.05 to 2.14
Cleavage: {010}, {100} indistinct
Tenacity: Brittle, conchoidal fracture
Streak: White
Synonyms/varieties:
Comments: Fluorescent pale yellowish green under LW-UV and deep green under SW-UV
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