Formula: (NH4)2SO4
Origin of name: For P. Mascagni, Italian anatomist
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Colourless, gray, yellowish grey, yellow
Diaphaneity: Transparent to translucent
Luster: Vitreous to dull
Habit: Crystals prismatic, rare; crusts; stalactitic
Hardness: 2 to 2.5
Specific gravity: 1.768
Cleavage: 1; {001} good
Tenacity:
Streak:
Synonyms/varieties:
Comments: Crystals transparent; aggregates translucent
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