Formula: CaAl2Si2O8
Origin of name: For Dmitrii Steinberg, petrologist
Crystal system: Hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Semitransparent
Luster:
Habit: Hexagonal tablets to 0.7 mm
Hardness: 6
Specific gravity: 2.75
Cleavage: 1; {0001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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