Formula: Hg4(SO4)N2
Origin of name: For V. Gianella, American geologist
Crystal system: Cubic
Crystal class: -43m
Twinning:
Unit cell:
Colour: Straw-yellow
Diaphaneity:
Luster:
Habit: Crystals octahedral, more commonly subhedral, flattened, in rosettes
Hardness: ~ 3
Specific gravity: 7.19
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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