Mineralpedia Details for Keckite
Keckite
Erich Keck, a German collector of Hagendorf minerals, is the namesake for Keckite. Keckite is a rare weathering product of phosphates in granite pegmatites. It can be found in Germany, Portugal, and newer localities in the United States, Australia, and the Democratic Republic of the Congo.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/keckite.pdf
- Formula
- CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3ยท7H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Fan Shaped
- Cleavage
- Poor, Indistinct, None
- Luster
- Earthy (Dull)
- Color
- brown, gray brown, yellow brown
- Streak
- yellow white
- Class
- Monoclinic - Prismatic
- Fracture
- Flexible
- Hardness
- 4.5
- WebMineral
- View Keckite
- Mindat
- View Keckite
Keckite from Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany
Keckite is isostructural with Jahnsite and found chielfy in phosphate pegmatites and is named in honor of Erich Keck. Erich is a long time expert on phosphate mineraolgy especially Hagendorf. The crystals here are small amber colored rosettes or clusters to about 0.75mm on Mitridatite.
Click thumbnail images for larger view.
