Formula: Na4Ca(SO4)3 . 2H2O
Origin of name: For Hans P. Eugster, American mineralogist
Crystal system: Monoclinic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent
Luster:
Habit: Clusters of thin fibers, microscopic
Hardness:
Specific gravity:
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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