Formula: Ba(Al,Mg)(PO4,CO3)(OH)2 . H2O
Origin of name: For N. Krasnov, Russian mineralogist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Pale blue
Diaphaneity: Translucent
Luster: Silky
Habit: As fibres forming spherules to 3 mm
Hardness: 2
Specific gravity: 3.70
Cleavage: 2; Parallel to [010] perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments: Decomposes with effervescence in warm HCl
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