Formula: Na2SrBa2Al4F20
Origin of name: For R. Bøgvad
Crystal system: Orthorhombic
Crystal class: Unknown
Colour: Colourless
Diaphaneity: Transparent
Habit: Blocky somewhat rounded crystals 0.05-0.15 mm
Hardness: 4
Specific gravity: 3.85
Cleavage: None
Streak: White
Synonyms/varieties:
Comments:
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