Mineralpedia Details for Strunzite
Strunzite
Hugo Strunz is honored as the namesake of Strunzite. He was a Professor of Mineralogy at the Technical University in Berlin, Germany and is noted for his work on pegmatite phosphates in particular in the area of Hagendorf, Germany. This secondary mineral is usually altered from triphylite in pegmatites and can be found in several localities including several mines here in the Black Hills, South Dakota.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/strunzite.pdf
- Formula
- Mn2+Fe3+2(PO4)2(OH)2ยท6H2O
- Crystal System
- Triclinic
- Crystal Habit
- Acicular, Lath
- Cleavage
- Good, None, None
- Luster
- Vitreous (Glassy)
- Color
- brownish yellow, golden yellow, straw yellow
- Streak
- light yellow
- Class
- Triclinic - Pinacoidal
- Hardness
- 4
- WebMineral
- View Strunzite
- Mindat
- View Strunzite
Strunzite from Palermo mine, Groton, Grafton Co., New Hampshire, United States
Fibrous light tan crystals to 1mm.
Strunzite from Gravel Hill mine, Perranzabuloe, Cornwall, England
Straw yellow fibrous crystals to about 0.75mm.
Strunzite from Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany
Golden or straw colored sprays of Strunzite to 3mm associated with yellow Laueite. Excellent specimen. Strunzite has been referred to as "Frondel's whiskers" after Clifford Frondell, who described the mineral in 1958. Although, Frondell named the mineral after Hugo Strunz.
Strunzite from Roosevelt mine, Custer Co., South Dakota, United States
Golden sprays of Strunzite, 1-2mm.
Strunzite from Foote mine, Cleveland Co., North Carolina, United States
A real nice silky, silvery blonde grouping of fibrous Strunzite crystals greater than 1cm across. Outward from the Strunzite are fibrous light to dark green Rockbridgeite. Mitridatite is also present and is probably most of the dull green.
