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Formula: Pb4(TeO3)2(SO4)(S2O3)
Valence: Pb2+4(Te4+O3)2(S6+O4)(S6+O3S2-)
Thiosulphate, tellurium-bearing mineral
Crystal system: Orthorhombic
Specific gravity: 6.599 calculated
Hardness: 2½ to 3
Streak: White
Colour: Colourless
Luminescence: No fluorescence under UV
Environments
Boevskite is a new mineral, approved in 2024 and to date (January 2026) reported only from thr type locality.
Localities
At the type locality, the Boevskoe Be deposit, Kaslinsky District, Chelyabinsk Oblast, Russia, boevskite was
found as euhedral grains up to 0.25 mm at the contact of galena and
pyrite, as inclusions in galena up
to 0.2 mm, and as thin veinlets up to 0.2 × 0.03 mm filling cracks in
sphalerite. The presence of sulphides in the ores of the deposit along
with fluorite led to the formation of sulphuric and hydrofluoric acids in
the oxidation zone and the active development of supergene
processes to a depth of 100 meters. The boevskite was formed as a result of the
supergene alteration of the co-existing
galena and tellurides
(empressite, hessite,
ingodite and joséite-B) in the
oxidation zone. Associated minerals include anglesite,
cerussite, chalcopyrite,
empressite, galena,
hessite, ingodite,
joséite-B, matildite,
pyrite, pyrrhotite and
sphalerite
(Mindat).
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