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Formula: Mn2+V3+2O4
Oxide, spinel subgroup,
oxyspinel group,
spinel supergroup, forms a series with
manganochromite
Crystal System: Isometric
Specific gravity: 4.64 calculated
Hardness: 6½
Colour: Brownish grey in reflected light
Environments
Localities
At the Ol'khonskiye Vorota Strait, Irkutsk Oblast, Russia, vuorelainenite occurs in
quartzite schists
associated with rutile, eskolaite,
karelianite, schreyerite and
olkhonskite
(HOM).
At the type locality, the Sätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden, the ore field is a
pyrite-pyrrhotite deposit where
ores and supracrustal rocks have been affected by metamorphism to the
amphibolite facies. The presence of an
andalusite - cordierite -
quartz - muscovite -
microcline assemblage allows the conditions of remobilisation to be
estimated: 2 to 3 kbar total pressure, and temperature of about 55OoC.
Vuorelainenite occurs in pyrrhotite-rich ore as euhedral, single
grains, from 5 to 80 microns across, usually at contacts between pyrrhotite
and gangue, or between pyrrhotite
and grains of rutile and
pyrophanite. Association with
sphalerite is rare.
(CM 20.2.281-290).
Associated minerals include pyrrhotite,
rutile, pyrophanite,
manganese-bearing sphalerite,
chalcopyrite and alabandite
(HOM).
Vuorelainenite from the Sätra Mine - Image
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