Green tripuhyite (a rare Sb-Fe oxide) associated to sharp colorless valentinite crystals from this classic Italian locality: Tafone Mine, Grosseto Province, Tuscany, Italy. — Photo: David Hospital · CC BY-SA 4.0
Tripuhyite
An iron antimonate — a dull yellow oxidation mineral named for Tripuhy, Brazil.
Intro adapted from Wikipedia (CC BY-SA).
Tripuhyite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Fe³⁺Sb⁵⁺O₄.
It crystallizes in the tetragonal crystal system (space group P4_2/mnm). It is a member of the Rutile structural group.
Key properties: Mohs hardness 6–7; specific gravity 5.82; Canary-yellow to dark brown with a greenish tinge streak; Dull luster; optically biaxial.
IMA symbol Tpy, IMA status: approved, named in 1897.
An alteration product of stibnite and pyrite in the oxidation zone of some hydrothermal antimony deposits; a detrital mineral.
It is found associated with Lewisite, monazite, rutile, kyanite, magnetite (Tripuhy mine, Brazil); selenium, sulfur, stibiconite, sénarmontite, roméite, mopungite (Mopung Hills, Nevada.
The name refers to its occurrence at the Tripuhy mine, Brazil.