Formula: Zn2AlSi2O5(OH)4 .2H2O
Origin of name: from composition: zinc (zin), aluminum (al) and silicon (si)
Crystal system: Monoclinic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: White, rose, reddish brown
Diaphaneity:
Luster:
Habit: Dense cryptocrystalline aggregates
Hardness: 2.5 to 3
Specific gravity: 3.01
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Probably an alteration product formed during the near-surface oxidation of zinc deposits.
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