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Mineralpedia Details for Shomiokite-(Y)

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Shomiokite-(Y)

Shomiokite-(Y)

Named for the Shomik River near the type locality at the Lovozero massif in the Kola Peninsula, Russia. In only two localities worldwide, the type locality and at Mont Saint-Hilaire in Canada, Shomiokite occurs as segregations and in intersections in potassic feldspar pegmatites, and also in intrusive alkalic gabbro-syenite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/shomiokite-(Y).pdf

Formula
Na3Y(CO3)3ยท3H2
Crystal System
Orthorhombic 
Cleavage
Perfect, None, None 
Luster
Earthy (Dull) 
Color
colorless 
Streak
white 
Class
Orthorhombic - Pyramidal 
Hardness
2-3 
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Shomiokite-(Y) from Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Russia

Shomiokite-(Y)
            from Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Russia

Long striated clear crystals to 2.3cm.

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