Formula: ThCa2Si8O20
Origin of name: From F. Ekanayake, Sri Lankan discoverer of mineral
Crystal system: Tetragonal
Crystal class: 422
Twinning:
Unit cell:
Colour: Straw-yellow to dark red
Diaphaneity:
Luster: Vitreous
Habit: Crystals stubby, tetragonal bipyramids; anhedral grains and pebbles
Hardness: 4.5
Specific gravity: 3.08
Cleavage: 1; {101} distinct
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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