Seidozerite

seidozerite

eudialyte

pyrochlore

lavenite

Images

Formula: Na2Zr2Na2MnTi(Si2O7)2O2F2
Sorosilicate (Si2O7 groups), rinkite group, seidozerite supergroup, zirconium-, manganese- and titanium- bearing mineral
Crystal system: Monoclinic
Specific gravity: 3.472 measured, 3.87 calculated
Hardness: 4 to 5
Colour: Light red or brownish yellow
Common impurities: Al,Fe,Nb,Mg,H2O
Environments

Pegmatites

Localities

At the Muruai and Uel'kuai rivers, Seidozero Lake, Lovozersky District, Murmansk Oblast, Russia, seidoxerite has been found in four nepheline syenite pegmatites. It occurs as radiating crystals up to 5 X 1 cm in size, brownish red to reddish yellow in small fragments, translucent with red colour and vitreous lustre. Associated minerals include microcline, aegirine, nepheline, apatite, pyrochlore, magnetite, ilmenite, titanium-bearing låvenite and eudialyte. It is replaced by minerals of the catapleiite type (AM 44.467-468).
Seidozerite from the Seidozeritovyi pegmatite - Image

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