Tetrarooseveltite
Tetrarooseveltite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Bi(AsO₄).
It crystallizes in the tetragonal crystal system (space group I4_1/a). It is a member of the Scheelite structural group.
Key properties: Mohs hardness 2.5; specific gravity 7.64; Earthy luster; optically uniaxial.
IMA symbol Troo, IMA status: approved, named in 1993.
Found as a rare secondary mineral in vugs in an oxidized fluorite–barite–quartz vein.
It is found associated with Bayldonite, malachite, mimetite, fluorite, quartz.
As the tetragonal dimorph of rooseveltite.
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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