Formula: FeAl2(PO4)2(OH)2.8H2O
Origin of name: from Greek para = similar and vauxite
Crystal system: triclinic
Crystal class: -1
Twinning:
Unit cell: a = 5.24 Å, b = 10.56 Å, c = 6.07 Å, a = 106.8°, b = 110.8°, g = 72.1°
Colour: colourless to pale greenish white
Diaphaneity:
Luster: vitreous, pearly on cleavage
Habit: crystals short prismatic to thick tabular, randomly intergrown, subparallel or radial aggregates
Hardness: 3
Specific gravity: 2.36
Cleavage: 1; {010} perfect
Tenacity: conchoidal, brittle
Streak: white
Synonyms/varieties:
Comments: dimorphous with metavauxite
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