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Formula: Na4Ti4(Si2O6)2[(Si,Al)4O10]O4.(H2O,Na,K)3
Inosilicate (chain silicate), single chains, titanium-bearing mineral
Crystal System: Monoclinic
Specific gravity: 2.85 to 2.97 measured 2.88 calculated
Hardness: 4
Streak: White
Colour: Colourless, white, pink, pink-brown
Luminescence: Fluoresces white to green under UV
Common impurities: Fe,Nb,Mg,Ca,Ba
Environments
Pegmatites
Hydrothermal environments
Localities
At the type locality, Lepkhe-Nel'm Mt, Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia,
vinogradovite occurs in spherulites and in aggregates of fibrous crystals, less commonly in cavities as fine
prismatic crystals; it is found at 12 localities as a late-stage hydrothermal mineral in
nepheline syenite
pegmatites of the Khibina and Lovozero massifs, Kola Peninsula,
in cavities of natrolite or
analcime in the central part, or replacing
lorenzenite and
lamprophyllite
in the contact zone. Associated minerals include lorenzenite,
lamprophyllite,
catapleiite, neptunite,
labuntsovite, titanite and
calcite
(AM 42.308, HOM).
Vinogradovite from Lepkhe-Nel'm Mt -
IMage
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