Reflected-light microscope picture illustrating the textural relations between the sulfides and oxides. Blue-filtered incandescent light. Abbreviations: mnv – monteneveite; mag – magnetite; ocr – oxycalcioroméite; ttr – tetrahedrite-(Fe); sp – sphalerite; ccp – chalcopyrite. Sample GEO-NRM catalogue no. HS3903. The image is published in an article distributed under the Creative Commons Attribution 4.0 License. — Photo: Andreas Karlsson, Dan Holtstam, Luca Bindi, Paola Bonazzi and Matthias Konrad-Schmolke · CC BY 4.0
Monteneveite
Monteneveite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Ca₃Sb⁵⁺₂(Fe³⁺₂Fe²⁺)O₁₂.
It crystallizes in the cubic crystal system (space group Ia3d). It is a member of the Garnet structural group.
Key properties: Mohs hardness 6.5–7; specific gravity 4.72; Brownish black streak; Adamantine luster.
IMA symbol Mtv, IMA status: approved, named in 2018.
Formed near peak metamorphism (at ~600 flC) during partial breakdown of tetrahedrite-(Fe) by reactions with carbonate, under relatively oxidizing conditions.
It is found associated with Magnetite, oxycalcioroméite, tetrahedrite-(Fe), sphalerite, chalcopyrite, anthophyllite, gudmundite, genplesite.
The name is taken from the type locality, the Monteneve (Schneeberg) mine.