mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Leucosphenite

Reset

Leucosphenite

Leucosphenite

Named for the Greek words for “white,” leuco, and “wedge,” sphena, in reference to the minerals typical color and habit. Leucosphenite is a rare mineral that occurs in Greencland, the United States, Canada, Russia, Tajikistan, and Japan and occurs in syenite in pegmatites, in aegirine-feldspar veins, and as an authigenic mineral in shales.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/leucosphenite.pdf

Formula
Na4BaTi2B2Si10O30 
Crystal System
Monoclinic 
Crystal Habit
Wedge shaped, Pseudo Hexagonal, Striated 
Cleavage
Perfect, Fair, None 
Luster
Vitreous (Glassy) 
Color
colorless, lemon yellow, brown, pale blue 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
6-6.5 
WebMineral
View Leucosphenite 
Mindat
View Leucosphenite 

Leucosphenite from Yubileinaya pegmatite, Karnasurt Mt., Lovozero Massif, Kola Peninsula, Russia

Leucosphenite
            from Yubileinaya pegmatite, Karnasurt Mt., Lovozero Massif, Kola Peninsula, Russia

Obscure micro crystals in matrix. 

Click thumbnail images for larger view.

Leucosphenite from Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada

Leucosphenite
            from Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada

Yellowish-green blocky crystals of Leucosphenite to 3mm with needles of Aegirine partially covering a cluster of slender Hedenbergite crystals to 3cm.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2020 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map