Mineralpedia Details for Ushkovite
Ushkovite
Sergei L’vovich Ushkov, a Russian naturalist who researched the Il’men National Forest in Russia, is the namesake of Ushkovite. Somewhat uncommon, UShkovite is found in only a few localities worldwide, including Russia, the USA, Namabia, and Brazil, and occurs as an alteration of weathered triplite in granite pegmatites.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/ushkovite.pdf
- Formula
- MgFe3+2(PO4)2(OH)2·8H2O
- Crystal System
- Triclinic
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Pearly
- Color
- brown, light yellow, orange
- Streak
- white
- Class
- Triclinic - Pinacoidal
- Hardness
- 3.5
- WebMineral
- View Ushkovite
- Mindat
- View Ushkovite
Ushkovite from Lavra do Eduardo, Galileia, Minas Gerais, Brazil
Orange, tabular crystals to about 0.75mm on albite.
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Ushkovite from Galiléia, Doce Valley, Minas Gerais, Brazil
Excellent yellow 2mm Ushkovite crystals on ugly yellowish Roscherite matrix. Along the cross section of the specimen you can see it is also composed of white Moreasite and Beryllonite. A great combination phosphate specimen.
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