Formula: Zn2(Fe,Mn)(PO4)2.4H2O
Origin of name: from phosphate and Greek for leaf
Crystal system: monoclinic
Crystal class: 2/m
Twinning: common on {100}, sometimes polysynthetic, rare on {-102}
Unit cell: a = 10.25 Å, b = 5.09 Å, c = 10.51 3, b = 120.3°
Colour: colourless to bluish green
Diaphaneity:
Luster: vitreous
Habit: crystals short to long prismatic, thick tabular
Hardness: 3 to 3.5
Specific gravity: 3.13
Cleavage: 3; {100} perfect, {010} and {-102} distinct
Tenacity: uneven, brittle
Streak:
Synonyms/varieties:
Comments:
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