Formula: (Ni,Fe)(SO4) . H2O
Origin of name: For E. Dwornik
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 6.839, b = 7.582, c = 7.474, β = 117.85°
Colour: White
Diaphaneity: Transparent to translucent
Luster: Vitreous
Habit: Fine-grained particles in aggregates
Hardness: 2-3
Specific gravity: 3.34
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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