Formula: (Au,Ag)2Te4
Origin of name: from Transylvania
Crystal system: monoclinic
Crystal class: 2/m
Twinning: common on {100}, contact, lamellar, or penetration
Unit cell: a = 8.96 Å, b = 4.49 Å, c = 14.62 Å, b = 145.4°
Colour: silver-white, yellowish tint
Diaphaneity: opaque
Luster: metallic, brilliant
Habit: crystals thick tabular or short prismatic, bladed, columnar or granular
Hardness: 1.5 to 21
Specific gravity: 8.16
Cleavage: 1; {010} perfect
Tenacity: uneven, brittle
Streak: silver-white
Synonyms/varieties:
Comments:
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