Formula: Fe2ZnMnFe(PO4)3(OH)2.9H2O
Origin of name: for R. Schooner, American collector
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 11.12 Å, b = 25.55 Å, c = 6.437 Å
Colour: pale tan to brown, reddish brown to bronze when oxidised
Diaphaneity:
Luster:
Habit: crystals lath-like, to 2 mm, as rosettes, sprays and mats
Hardness: about 4
Specific gravity: 2.87 to 2.92
Cleavage: 2; {010} micaceous, {001} good
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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