Formula: (Na,K)2Fe4(AsO4)3(OH)5.7H2O
Origin of name: from sodium and pharmacosiderite
Crystal system: cubic
Crystal class: -43m
Twinning:
Unit cell:
Colour: pale green
Diaphaneity:
Luster: vitreous
Habit: crystals cubic, to 0.5 mm
Hardness: about 3
Specific gravity: 2.79
Cleavage: 1; {001} imperfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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