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Formula: Cu3[(V,As)O4]2
Anhydrous vanadate arsenate
Crystal System: Monoclinic
Specific gravity: 4.69 calculated
Hardness: 4½
Streak: Yellowish brown
Colour: Red-brown, golden brown or brown
Environments
Borisenkoite is a relatively new mineral, approved in 2016 and to date (January 2024) reported only from the
type locality.
Localities
At the type locality, the Yadovitaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption,
Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia, borisenkoite occurs as prismatic crystals
to 0.10 mm usually combined in clusters to 0.4 mm or as rims to 0.05 mm around
lammerite. Associated minerals include
sanidine, hematite,
lammerite, paralammerite,
bradaczekite,
zincobradaczekite,
mcbirneyite, pseudolyonsite,
lyonsite, starovaite,
tenorite, rutile,
tripuhyite, pseudobrookite,
piypite, langbeinite,
calciolangbeinite,
aphthitalite,
alumoklyuchevskite,
palmierite, cupromolybdite
and corundum
(HOM).
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