Kainotropite
A rare copper-iron vanadate from Tolbachik's 'Yadovitaya' (poisonous) fumarole.
Intro adapted from Wikipedia (CC BY-SA).
Kainotropite is an IMA-recognized mineral species in the vanadate class, with the chemical formula Cu₄Fe³⁺O₂(V₂O₇)(VO₄).
It crystallizes in the orthorhombic crystal system (space group Pnma).
Key properties: Mohs hardness 5; specific gravity 4.104; Dark brown-red streak; Semimetallic luster.
IMA symbol Ktr, IMA status: approved, named in 2015.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Hematite, langbeinite, calciolangbeinite, tenorite, piypite, lyonsite, rutile, pseudobrookite, sanidine, lammerite.
Its name comes from the Greek for ‘unusual’.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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