Formula: (NH4)2Mg(SO4)2 . 6H2O
Origin of name: For J Boussingault, French chemist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Colourless, yellowish pink
Diaphaneity: Transparent
Luster:
Habit: Crystals short prismatic; stalactitic or as crusts
Hardness: 2
Specific gravity: 1.722
Cleavage: 1; {-201} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Soluble in water
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