Formula: Cu3(AsO4,PO4)2
Origin of name: For Franz Lammer, Austrian discoverer of mineral
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Dark green
Diaphaneity:
Luster: Adamantine
Habit: Crystals to 0.5 mm in spheroidal aggregates
Hardness: 3 to 4
Specific gravity: 5.18
Cleavage: 2; {010} good, {100} poor
Tenacity:
Streak: Light green
Synonyms/varieties:
Comments:
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