Brown crystals of the rare vanadium mineral saneroite from the type locality in Valgraveglia mine (Reppia, Ne, Graveglia Valley, Genova Province, Liguria, Italy). — Photo: David Hospital · CC BY-SA 4.0
Saneroite
A triclinic manganese-vanadium silicate from Italy, named for Genoa professor Edoardo Sanero.
Intro adapted from Wikipedia (CC BY-SA).
Saneroite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaMn²⁺₅[Si₅O₁₄(OH)](VO₃)(OH).
It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Saneroite structural group.
Key properties: specific gravity 3.47; Resinous to greasy luster; optically biaxial.
IMA symbol Snr, IMA status: approved, named in 1979.
Found in veins in manganese ores in association with low-grade prehnite-pumpellyite facies metamorphic recrystallization of siliceous-hematitic sediments (Val Graveglia, Italy).
It is found associated with Quartz, barite, caryopilite, ganophyllite (Val Graveglia, Italy); medaite, palenzonaite, pyrobelonite, fianelite, parsettensite, rhodochrosite, kutahorite.
The name refers to Edoardo Sanero, formerly Professor of Mineralogy at the University of Genoa, Genoa, Italy.