Formula: (NH4)2SiF6
Origin of name: From Greek for concealed and salt
Crystal system: Cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: Colourless, white, gray
Diaphaneity: Transparent
Luster: Vitreous
Habit: Massive, crusts, mammillary, arborescent
Hardness: 2.5
Specific gravity: 2.011
Cleavage: 1; {111} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with bararite
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