Formula: (Ni,Mg,Fe)(SO4).6H2O
Origin of name: from nickel and hexahydrite
Crystal system: monoclinic
Crystal class: unknown
Twinning:
Unit cell:
Colour: blue-green
Diaphaneity:
Luster: vitreous
Habit: crusts, coatings
Hardness:
Specific gravity: 2.07
Cleavage: 2; {010} perfect, {100} good
Tenacity:
Streak:
Synonyms/varieties:
Comments: Ni analogue of hexahydrite, dimorphous with retgersite
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