Abswurmbachite is a copper manganese silicate mineral ((Cu,Mn2+)Mn3+6O8SiO4). It was first described in 1991 and named after Irmgard Abs-Wurmbach (born 1938), a German mineralogist. It crystallizes in the tetragonal system. Its Mohs scale rating is 6.5 and its specific gravity is 4.96. It has a metallic luster and its color is jet black, with light brown streaks.
Copper manganese silicate mineral
Abswurmbachite
All data from the card 18
- Category
- Nesosilicate
- Formula
- (Cu,Mn2+)Mn3+6O8SiO4
- IMA symbol
- Abs
- Strunz classification
- 9.AG.05
- Dana classification
- 7.5.1.4
- Crystal system
- Tetragonal
- Crystal class
- 4/mmm – Ditetragonal dipyramidal
- Unit cell
- 1640.82 Å3
- Color
- Black
- Cleavage
- None observed
- Tenacity
- Brittle
- Mohs scale hardness
- 6.5
- Luster
- Metallic
- Streak
- Brownish black
- Specific gravity
- 4.96 g/cm3
- Density
- 4.96 g/cm3
- Pleochroism
- Non-pleochroic
- Common impurities
- Iron
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