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Mineralpedia Details for Yuksporite

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Yuksporite

Yuksporite

Named after its discovery locality near Mt. Yukspor in the Kola Peninsula, Russia.  Found only in Russian alkali massifs, Yuksporite occurs in nepheline syenite veins. Yuksporite is one of the only two members of the Umbite Group.

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

Formula
K4(Ca,Na)14Sr2Mn(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3 
Crystal System
Monoclinic 
Crystal Habit
Concretionary, Nodular 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
brown pink, pink 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
4.5-5 
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Yuksporite from Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Russia

Yuksporite
            from Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Russia

Red platy segregations in metamorphosed matrix. See old Russian label.

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