Abswurmbachite was discovered in 1990 and named after a German mineralogist, Dr. Irmgard Abs-Wurmbach.
Properties of Abswurmbachite
The following are the key properties of Abswurmbachite:
- Cell Data
- Space group: [I41/acd.]
- a = 9.406(1)
- c = 18.546(3)
- Z = 
- Crystal Data
- Tetragonal (by analogy to braunite)
- Point group: [4/m 2/m 2/m]
- Anhedral grains, to 50µm
- X-ray powder pattern: Synthetic (Cu 0:98 Mn2+0:02) Σ=1:00Mn 3+6 SiO12
- 2.702 (100), 1.6507 (30), 2.350 (15), 2.133 (15), 1.459 (14), 1.4016 (11), 1.6627 (10)
- Chemical Composition
How to Identify Abswurmbachite
Abswurmbachite can be identified in the field by its brownish-black color. It is opaque, with a hardness of 6.5 (approximate to pyrite), and a density of 4.96g/cm3.
This mineral has a metallic lustre, with no cleavage.
Abswurmbachite can be found on the islands of Greece at Mili, Evvia Island, and Apikia, Andros Island, and the Cyclades Islands.
Occurrence of Abswurmbachite and Useful Mineral Association
Abswurmbachite occurs in very low-grade, high-pressure metamorphic manganese-aluminum-rich quartzites.
It is often associated with minerals such as quartz, tenorite, ardennite, sursassite, rutile, hollandite, shattuckite, clinochlore, and piemontite.