Formula: 2CaSO3 . H2O
Origin of name: After locality; Hannebach, Eifel, Germany
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 6.473, b = 9.782, c = 10.646
Colour: Colourless
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals to 1 mm long
Hardness: 3.5
Specific gravity: 2.52
Cleavage: 1; {110} perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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