Formula: AuSn
Origin of name: after locality Yuangjiang River, Hunan, China
Crystal system: Hexagonal
Crystal class: 6/m 2/m 2/m
Twinning:
Unit cell: a = 4.316, c = 5.51
Colour: Silver white
Diaphaneity: Opaque
Luster: Metallic
Habit: Grains < 5 micron forming nodular aggregates to 2 mm, rare hexagonal prisms slightly larger than grains
Hardness: 3.5 to 4
Specific gravity: 11.7 to 11.9
Cleavage: None observed
Tenacity: Sectile
Streak: Black
Synonyms/varieties:
Comments:
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