Formula: (Li,Na)2CaAl4(PO4)4(OH,F)4
Origin of name: For Antonio Bertossa, Rwandan geologist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Pale pink
Diaphaneity:
Luster: Vitreous
Habit: Massive
Hardness: 6
Specific gravity: 3.10
Cleavage: 1; {100} good
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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