Formula: NH4BF4
Origin of name: For Franco Barberi, Italian vulcanologist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent to translucent
Luster: Vitreous
Habit: Tabular to platy crystals 50 to 300 um, form globular aggregates
Hardness:
Specific gravity: 1.89
Cleavage: 2; {100} perfect {001} good
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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