Formula: Ni(OH)2-x(SO4,CO3)0.5x (x ~ 0.6)
Origin of name: from Greek para = similar and otwayite
Crystal system: monoclinic
Crystal class: m
Twinning:
Unit cell: a = 7.89, b = 2.96, c = 13.63, β = 91.1°
Colour: Emerald green
Diaphaneity: Translucent
Luster: Silky
Habit: Fibers to 0.5 mm long by 5 micron wide forming masses and cross-fiber veinlets
Hardness: 4
Specific gravity: 3.30
Cleavage: None
Tenacity: Brittle
Streak: White
Synonyms/varieties:
Comments:
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