Formula: Cu2Zn
Origin of name: Named for the composition (tong=copper, xin=zinc).
Crystal system: Isometric (cubic)
Crystal class: Unknown
Twinning:
Unit cell: a = 7.735
Colour: Golden yellow
Diaphaneity: Opaque
Luster: Metallic, tarnishes upon exposure to air
Habit: Irregular grains, anhedral, microscopic
Hardness:
Specific gravity:
Cleavage:
Tenacity:
Streak:
Synonyms/varieties:
Comments: Rejected by IMA
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