Mineralpedia Details for Lamprophyllite
Lamprophyllite
Named after the Greek words lampro and phyllo, meaning “shining” and “leaf,” respectively, I reference to the mineral’s lustrous, leaf-like sheets that make up its cleavage planes. Lamprophyllite is a rare, but widespread mineral and can be found in localities in Russia, Greenland, Norway, South Africa, the United States, Canada, and Brazil. In the Kola Peninsula rocks in Russia, it occurs in all the surrounding rock types and most of the pegmatites in the massifs.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/lamprophyllite.pdf
- Formula
- Na3(SrNa)Ti3(Si2O7)2O2(OH)2
- Crystal System
- Monoclinic
- Crystal Habit
- Radial, Stellate, Acicular
- Cleavage
- Good, None, None
- Luster
- Vitreous - Pearly
- Color
- yellow, brown
- Streak
- brownish white
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle
- Hardness
- 2.5
- WebMineral
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- Mindat
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Lamprophyllite from Sengischorr Mt., Lovozero Massif, Kola Peninsula, Russia
Brown thin prismatic Lamprophyllite in excellent stellar sprays to 2cm in diameter.
Bronzy colored prismatic crystals on star-shaped patterns to 1cm across.
Lamprophyllite from Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia
Long, bladed, orange-red divergent crystals to 2.5cm. Associated with Aegerine.
