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Voloshinite

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SKY759421

Voloshinite

Type Locality

Description Tabs

Description
Locality: 
Vasin-Myl'k Mountain, Voron'i Tundry, Murmansk Oblast, Russian Federation
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.3 × 0.4 cm
Description

Polished section consisting of pink crystal aggregates of the extremely rare rubidium mineral voloshinite associated to white pollucite, another rare mineral , in this case a cesium mineral.

Rubidium minerals are extremely rare in Nature since only 5 mineral species (aleutite, ramanite-(Rb), voloshinite, londonite and rubicline ) from more than 5500 known mineral species are rubidium minerals, so it is a real rarity, almost never seen on the mineral market.

Cesium minerals (for the pollucite) are also very rare in Nature since only 28 cesium mineral species are known !

Completely analyzed specimen by SEM/EDS, see copy enclosed.

Two Rb and Cs rarities in a single specimen !.

Mineral Data
What's on the rock

Voloshinite

Formula: 
Rb(LiAl1.51.5)(Al0.5Si3.5)O10F2
Hardness: 
0.0
Type Locality: 
Vasin-Myl'k Mt, Voron'i Tundry, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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