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Formula: Fe3+Sb5+O4
Antimonate, rutile group
Crystal System: Tetragonal
Specific gravity: 5.82 measured 6.70 calculated
Hardness: 6 to 6½
Streak: Yellow to brown
Colour: Yellowish brown, lemon-yellow, brown-black
Environments:
Tripuhyite is an alteration product of stibnite and
pyrite in the oxidation zone of some hydrothermal
antimony
deposits, and it is also a detrital mineral
(HOM).
Localities
At the type Locality, Tripuí, Ouro Preto district, Ouro Preto, Minas Gerais, Brazil, tripuhyite is associated
with hydroxycalcioroméite,
monazite,
rutile, kyanite and
magnetite
(HOM).
At the Mopung Hills, Nevada, USA, tripuhyite is associated with
selenium,
sulphur, stibiconite,
senarmontite, roméite and
mopungite
(HOM).
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