Formula: (Zn,Mn)SO4 . H2O
Origin of name: For H. Gunning, Canadian geologist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: White
Diaphaneity:
Luster:
Habit: Efflorescence, fine-grained
Hardness: ~2.5
Specific gravity: 3.19
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Easily soluble in cold water
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