Jun 3 2014
Abramovite is a very rare mineral, and a member of the cylindrite group of minerals. It was named after the Russian mineralogist Dmitry Vadimovich Abramov, of the A.E. Fersman Museum, Russia.
Properties of Abramovite
- Cell Data
- Space group: P1
- a = 23.4(3)
- b = 5.77(2)
- c = 5.83(1)
- α = 89.1(5)°
- β = 89.9(7)°
- γ = 91.5(7)°
- Crystal Data
- Triclinic
- Point group: 1
- Crystals, lamellar, to 1mm, striated slightly parallel to elongation
- Twinning: Lamellar on {100}
- X-ray powder pattern: 3.90 (100), 3.84 (71), 5.90 (36), 2.921 (33), 3.166 (26), 2.040 (20), 2.186 (18)
- Chemical Composition
| Elements |
Content |
| Pb |
37.11 |
| S |
20.66 |
| Bi |
17.30 |
| Sn |
12.11 |
| In |
11.40 |
| Se |
0.98 |
| Cd |
0.03 |
| Cu |
0.01 |
| Total |
99.60 |
- Optical Properties
- Optical class: n.d.
- Bireflectance: Weak
- Anisotropism: Distinct
- R1-R2: (400) 14.0–32.9, (470) 13.9–29.0, (550) 15.7–29.9, (590) 16.4–30.2, (650) 17.9 30.8, (700) 18.9–31.2
- Estimated Properties
| Electron density |
Bulk density (electron density) = 7.64 gm/cm3
note: Specific gravity of Abramovite = 9.00 gm/cm3 |
| Photoelectric |
PEAbramovite = 1,081.69 barns/electron
U = PEAbramovite x ρElectron density = 8,262.78 barns/cm3 |
| Fermion index |
Fermion index = 0.1
Boson index = 0.9 |
| Radioactivity |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Abramovite is not radioactive |
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How to Identify Abramovite
Abramovite can be identified in the field by its silver-gray, opaque appearance. It has a metallic lustre, with a black streak. This mineral forms crust-like aggregates on matrix.
Global Distribution
Abramovite is found only in Russia in the Kupol Fumarole field, Kudryavy volcano, Iturup Island, and southern Kurile Islands.
Occurrence of Abramovite and Useful Mineral Association
Abramovite occurs due to the precipitation from fumarolic gases at 600°C (1112°F) in an active strato-volcano.
It is often associated with minerals such as anhydrite, pyrrhotite, pyrite, sylvite, wurzite, galena, and halite.
References
http://www.mindat.org/min-29261.html
http://webmineral.com/data/Abramovite.shtml
http://rruff.geo.arizona.edu/doclib/hom/abramovite.pdf