Kuzmenkoite-Mn

kuzmenkoite-Mn

murmanite

calciohilairite

vinogradovite

Images

Formula: K2MnTi4(Si4O12)2(OH)4.5-6H2O
Cyclosilicate (ring silicate), manganese and titanium bearing mineral
Specific gravity: 2.67 to 2.97
Hardness: 5
Streak: White
Colour: Colourless to yellow to dark orange.
Common impurities: Fe
Environments

Hydrothermal environments

Localities

At the type locality, Selsurt Mountain, Lovozersky District, Murmansk Oblast, Russia, kuzmenkoite-Mn occurs in minute cavities in albitised murmanite-bearing lujavrites. It is a late hydrothermal phase associated with natrolite, labuntsovite, calciohilairite, vinogradovite and carbonate-rich fluorapatite. Minerals formed earlier include aegirine, albite, eudialyte, lorenzenite, murmanite, magnesio-arfvedsonite, microcline and nepheline. Kuzmenkoite-Mn also occurs as pseudomorphs of murmanite. (AM 85.1562).

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