Formula: KFe2(PO4)2(OH) . 2H2O
Origin of name: From Greek for white and from phosphorus
Crystal system: Monoclinic
Crystal class: Unknown
Twinning:
Unit cell: a = 9.77 Å, b = 9.65 Å, c = 8.74 Å, β = 102.4°
Colour: Buff to chocolate brown, greenish to white, reddish
Diaphaneity:
Luster: Vitreous, dull in sediments
Habit: Crystals short prismatic; lamellar; fine-grained chalk-like masses
Hardness: 3.5
Specific gravity: 2.95
Cleavage: 1; {100} parting
Tenacity: Brittle
Streak:
Synonyms/varieties:
Comments:
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