Walfordite
A variety of Minerals

What is Walfordite?
Walfordite is a very rare tellurite mineral that was discovered in Chile in 1999. The mineral is described as orange with orange-yellow streak, and is determined to have a chemical formula of Fe,TeTe3O8 with minor titanium and magnesium substitution resulting in an approximate empirical formula of (Fe,Te,Ti,Mg)(Te)3O8.
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Key Characteristics
Formation of Walfordite
The only reported occurrence is in the Wendy open pit, El Indio-Tambo mining district of the Coquimbo Region, northern Chile where it occurs in oxidized breccia associated with a tellurium-bearing gold deposit. Associated minerals include: alunite, rodalquilarite, native gold, emmonsite, jarosite and pyrite. The mineral was named for mine geologist Phillip Walford (1945— ) who first noted the mineral.
Quick Facts
Physical Properties
- Color
- Orange
- Density
- 5.84 g/cm³
- Streak
- Orange-yellow
Chemical Properties
- Chemical Formula
- (Fe3+,Te6+)Te4+3O8
- Elements
- Fe, O, Te

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