Mineralpedia Details for Ullmannite
Ullmannite
The discoverer of the mineral, Johan Christoph Ullmann, a German chemist and mineralogist, is the namesake for Ullmannite. Relatively common and widespread, Ullmannite is found with nickel-bearing minerals in hydrothermal veins.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/ullmannite.pdf
- Formula
- NiSbS
- Crystal System
- Isometric
- Crystal Habit
- Massive - Granular, Massive
- Cleavage
- Good, Good, Good
- Luster
- Metallic
- Color
- steel gray, silver white, tin white
- Streak
- grayish black
- Class
- Isometric - Tetartoidal
- Fracture
- Brittle
- Hardness
- 5.5
- WebMineral
- View Ullmannite
- Mindat
- View Ullmannite
Ullmannite from Monte Narba, Sarrabus, Sardinia, Italy
Silvery, cubic crystals to 5mm.
Click thumbnail images for larger view.
Ullmannite from Siegen, Westphalia, Germany
Grey silvery rich mass.
Click thumbnail images for larger view.
