Rossovskyite
Rossovskyite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Fe³⁺,Ta)(Nb,Ti)O₄.
It crystallizes in the monoclinic crystal system (space group P2/c). It is a member of the Columbite structural group.
Key properties: Mohs hardness 6; specific gravity 6.06; Black streak; Semi-metallic to dull luster.
IMA symbol Rvy, IMA status: approved, named in 2014.
Found in a lens-shaped, zoned pegmatite body at the contact of porphyritic biotite granite with crystalline schist.
It is found associated with Quartz, microcline, muscovite, triplite, albite, apatite, pyrite, schorl, almandine- spessartine garnet, beryl, zircon, yttrobetafite-(Y).
The mineral was named to honor Lev Nikolaevich Rossovsky (1933-2009), a specialist in the geology.