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Formula: Ca6Zr(Si2O7)2(OH)4
Sorosilicate (Si2O7 groups), zirconium-bearing
mineral
Crystal system: Orthorhombic
Specific gravity: 3.034 calculated
Hardness: 3 to 4
Streak: White
Colour: Colourless
Luminescence: Blue cathodoluminescence
Solubility: Soluble in dilute hydrochloric acid but insoluble in water
Environments
Metamorphic environments
Hydrothermal environments
Localities
There are two co-type localities: the Yoko-Dovyrensky Massif, Dovyren Highlands, Severo-Baykalsky District, Buryatia,
Russia and the Belyi stream, Yoko-Dovyrensky Massif, Dovyren Highlands, Severo-Baykalsky District, Buryatia, Russia.
At the type localities dovyrenite occurs as an alteration product of
zirconium-bearing minerals in veins of
vesuvianite-foshagite
skarn in carbonate xenoliths in a subvolcanic layered
gabbro-peridotite
massif. Dovyrenite is a secondary low-temperature
mineral forming xenomorphic crystals (crystals not bounded by their own faces but with their forms impressed upon
them by adjacent mineral grains) up to 100 µm in size, rare colourless crystals (less than 300 µm long) and stellate
growths; it also forms polycrystalline reaction rims (less than 200–250 µm thick) on
calzirtite. Associated minerals include
fassaitic pyroxene,
perovskite, hydrogarnets,
monticellite, vesuvianite,
diopside, foshagite,
brucite, calzirtite,
tazheranite, baghdadite,
apatite, calcite,
native bismuth, sphalerite,
selenium-bearing galena,
clausthalite, safflorite,
rammelsbergite,
pyrrhotite, pentlandite,
valleriite, laitakarite,
nickeline and
nickelskutterudite
(HOM, Mindat).
Dovyrenite from the Yoko-Dovyrensky Massif -
Image
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