Formula: Tl3AsS3
Origin of name: For A.J. Ellis, chemist from New Zealand
Crystal system: Hexagonal
Crystal class: 3m
Twinning:
Unit cell:
Colour: Dark gray
Diaphaneity: Opaque
Luster: Metallic
Habit: Grains, anhedral to irregular
Hardness: 2
Specific gravity: 7.10 to 7.18
Cleavage: 1; Rhombohedral, good to excellent
Tenacity:
Streak: Light brown with orange tint
Synonyms/varieties:
Comments:
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