Formula: (K,Na)AlSiO4
Origin of name: from Greek tria = three and kalsilite
Crystal system: hexagonal
Crystal class: 6
Twinning:
Unit cell:
Colour: colourless
Diaphaneity: transparent
Luster: vitreous
Habit: massive
Hardness: 6
Specific gravity: 2.63
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: polymorphous with kaliophilite, kalsilite and panunzite
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