Formula: SrCaAl(F,OH)7
Origin of name: After locality; Karasug, Siberia, Russia
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent
Luster: Vitreous
Habit: Bladed crystals to 0.0003 x 0.1 x 0.25 mm in rosettes to 1 x 1.5 x 1.5 mm
Hardness:
Specific gravity: 3.06 to 3.11
Cleavage: 1; {100} cleavage or parting
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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