Mineralpedia Details for Thortveitite
Thortveitite
Norwegian mineralogist Olaus Thortveit is the namesake of this mineral as he was the one to discover it. Thortveitite is found at quite e few localities including Norway, Japan, Russia, and the USA in granite, pegmatitic dikes.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/thortveitite.pdf
- Formula
- Sc2Si2O7
- Crystal System
- Monoclinic
- Crystal Habit
- Crystalline - Fine, Radial, Prismatic
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Adamantine
- Color
- brown, grayish black, black, grayish green
- Streak
- gray
- Class
- Monoclinic - Prismatic
- Fracture
- Conchoidal
- Hardness
- 6.5
- WebMineral
- View Thortveitite
- Mindat
- View Thortveitite
Thortveitite from Tuftane quarry, Frikstad, Iveland, Aust-Agder, Norway
The crystals in this specimen are slender, glassy greenish crystals suspended in Plagioclase matrix.
Click thumbnail images for larger view.
Thortveitite from Flåt Feldspar Quarry, Flåt, Evje og Hornnes, Aust-Agder, Norway
Slender greenish Thortveitite crystals to 7-8mm embedded throughout a piece of reddish Feldspar matrix.
Thortveitite is a relatively rare REE Silicate that was discovered in Norway and named for Olaus Thortveit, a feldspar and mineral exporter.
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