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0 item @ $0.00  

Murmanite

#PD32101

Murmanite

#PD32101
Availability
Sold
Size
7 x 6 x 1.5 cm - Sm Cabinet 
Formula
Na2Ti2(Si2O7)O2·2H2O (RRUFF)
Locality
Ilimaussaq complex, Narsaq, Kitaa prov., Greenland

1mm pinkish plates of Murmanite scattered about matrix.

Murmanite is not a mica but is a sorosilicate and is triclinic and contains Nb-Ti in large platy aggregates. Rare as crystals - lilac to pinkish purple in nepheline syenites and pegmatites asccording to Bernard and Hyrsl. Murmanite looks micaceous but is not, although it does have a distinct basal cleavage.

Murmanite

Formula
Na2Ti2(Si2O7)O2·2H2
Crystal System
Triclinic 
Crystal Habit
Tabular, Massive 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
pink, bright pink, silvery, yellow, brown 
Streak
white 
Class
Triclinic - Pedial 
Fracture
Brittle - Uneven 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Don Phillips Collection
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