Mineralpedia Details for Langbanite
Langbanite
Named for its type locality at Langban in Sweden. Langbanite is a rare mineral that can be found only in its type locality and in Japan. It occurs “in crystalline limestones and manganese-rich skarns in metamorphosed manganese deposits.” Associated minerals include manganoan aegirine, richterite, braunite, mangnetite, hausmannite, rhodonite, and hedyphane.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/langbanite.pdf
- Formula
- Mn2+4Mn3+9Sb5+O16(SiO4)2
- Crystal System
- Monoclinic
- Crystal Habit
- Prismatic, Crystalline - Coarse
- Cleavage
- Good, None, None
- Luster
- Metallic
- Color
- iron black
- Streak
- grayish black
- Class
- Monoclinic - Prismatic
- Hardness
- 6.5
- WebMineral
- View Langbanite
- Mindat
- View Langbanite
Langbanite from Langban, Varmland, Sweden
Deep jet black prismatic, superb and well-formed crystal to about 0.75mm well exposed at the tip of the arrow.
Click thumbnail images for larger view.
