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Barytolamprophyllite

#BM40513

Barytolamprophyllite

#BM40513
Availability
Sold
Size
5 x 3.5 x 2 cm - Miniature 
Formula
Na3(BaK)Ti3(Si2O7)2O2(OH)2 (RRUFF)
Locality
Palitra pegmatite, Mt. Kedykverpakhk, Lovozero Massif, Kola Peninsula, Russia
Tagged
pegmatite mineral

Orange radiating rosettes to 1cm.

Dr. Igor Pekov described this pegmatite as "dry", meaning that late stage hydrothermal activity did not develop and consequently anhydrous minerals were perfectly preserved. Like many of the Lovozero pegmatites, Palitra is  feldspathoid-bearing and highly alkali or "hyperagpaite", an environment in which typical aluminum feldspars seen in granitic pegmatites cannot form for lack of aluminum and an over abundance of sodium. A good article on Palitra can be found in the Min. Record V36, pg 397 (Sept./Oct 1995).

Barytolamprophyllite

Formula
Na3(BaK)Ti3(Si2O7)2O2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Flakes, Stellate 
Cleavage
Perfect, Good, Poor 
Luster
Vitreous (Glassy) 
Color
golden brown, dark brown 
Streak
light brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
2-3 

Data courtesy of Webmineral.

Collection
McConlogue Collection

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