Gachingite
Gachingite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Au(Te₁₋ₓSeₓ) 0.2 ≈ x ≤ 0.5.
It crystallizes in the orthorhombic crystal system (space group Cmca).
Key properties: specific gravity 10.47; Metallic luster.
IMA status: approved, named in 2021.
Found in an epithermal gold deposit of the high-sulfidation (HS) type in volcanic rocks.
It is found associated with Gold (Au-Ag), calaverite, maletoyvayamite, watanabeite, Au-Sb oxides, quartz, alunite, native sulfur, kaolinite.
The name refers to the Gaching ore deposit where the studied material was collected.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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