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Barytolamprophyllite
Named for the relationship to lamporphyllite and for the barium in the composition. Barytolamprophyllite is a rare mineral that occurs in ijolite in its Russian localities. Additional localities include in Germany, the United States, Greenland, and Canada. Assocaited minerals include aegirine, nepheline, K-feldspar, cancrinite, apatite, amphibolites, eudialyte, natrolite, and pectolite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/barytolamprophyllite.pdf
- 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
- WebMineral
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Barytolamprophyllite from Palitra pegmatite, Mt. Kedykverpakhk, Lovozero Massif, Kola Peninsula, Russia
Amber-brown, platy, radial crystals to 1cm across. Identified by Dr. Igor Pekov.
Barytolamprophyllite from Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia
Flashy, vitreous cleaveable mass.