Formula: (NH4)2Ca(SO4)2 . H2O
Origin of name: For J. Kokta, Czech chemist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless, white
Diaphaneity:
Luster:
Habit: Crystals acicular or fibrous
Hardness:
Specific gravity: 2.09
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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