Formula: (Ni,Cu)Al4[(SO4),(NO3)2](OH)12.3H2O
Origin of name: from nickel and alum
Crystal system: monoclinic
Crystal class: 2
Twinning:
Unit cell:
Colour: sky-blue
Diaphaneity:
Luster:
Habit: thin coatings
Hardness:
Specific gravity: 2.24
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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