Zolotarevite

zolotarevite

lueshite

lomonosovite

umbozerite

Images

Formula: Na₅Zr[Si₆O₁₅(ОН)₃].3H₂O
Cyclosilicate (ring silicate), lovozerite group, zirconium-bearing mineral
Crystal System: Trigonal
Specific gravity: 2.75 measured, 2.85 calculated for the empirical formula
Hardness: 5
Streak: White
Colour: Cherry-red
Environments

Plutonic igneous environments

Zolotarevite is a new mineral, approved in 2020 and to date (May 2023) reported only from the type locality.

Localities

At the type locality, Alluaiv Mountain, Lovozersky District, Murmansk Oblast, Russia, zolotarevite was found in a light-coloured nepheline syenite as anhedral grains up to 1 mm across. Associated minerals include microcline–perthite, nepheline, sodalite, aegirine, lamprophyllite, lueshite, umbozerite, lomonosovite, nastrophite, a mineral of the kazakovite–tisinalite series, sphalerite and löllingite.
Zolotarevite is unique in that it is a highly hydrated lovozerite-group mineral with the B site occupied by variable amounts of H₂O (MM86.2.263-271).

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