Formula: Na2Si4O9
Origin of name: For locality; near Ertixi River, China
Crystal system: Cubic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent
Luster: Vitreous
Habit: Grains 0.1 to 0.5 mm
Hardness: 5.8 to 6.5
Specific gravity: 2.35
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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