Formula: Ca4MgH2(AsO4)4 . 4H2O
Origin of name: Locality; Irhtem deposit, Morocco
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless, white, pale rose
Diaphaneity:
Luster: Silky
Habit: Crystals; tiny spherulites
Hardness:
Specific gravity: 3.09
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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