Formula: H2Ca4Mg(AsO4)4.11H2O
Origin of name: from Greek for bitter and from pharmacolite
Crystal system: triclinic
Crystal class: -1
Twinning:
Unit cell: a = 13.7 Å, b = 13.5 Å, c = 6.75 Å, a = 99.9°, b = 96.4°, g = 91.6°
Colour: colourless, white
Diaphaneity:
Luster: slightly pearly
Habit: acicular, tiny, mammillary incrustations, concretions, nodules with radial structure, to 1 cm
Hardness:
Specific gravity: 2.62
Cleavage: 2; {100} and {010} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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