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Formula: Cu5O2(VO4)2.CuCl2
Vanadate
Crystal System: Trigonal
Specific gravity: 3.54 measured, 4.01 calculated
Hardness: 4
Streak: Black
Colour: Black
Environments
Averievite was approved in 1995 but to date (May 2023) it has been reported only from the
Tolbachik volcano.
Localities
At the type locality, the Great Fissure eruption, Tolbachik volcano, Kamchatka Krai, Russia, averievite
occurs as pseudohexagonal crystals, to 0.3 mm, in volcanic fumaroles, associated with
piypite,
alumoklyuchevskite,
fedotovite, alarsite,
nabokoite, tenorite,
lammerite and langbeinite
(HOM, Mindat).
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