Sep 19 2014
Bukovite was named after the place of occurrence, which is at Bukov, Czech Republic. It is a rare selenide mineral.
Properties of Bukovite
The following are the key properties of bukovite:
- Cell Data
- Space group: I42m, I4mm or I4/mmm
- a = 3.976(5)
- b = 13.70(2)
- Z = 1
- Crystal Data
- Tetragonal
- Point group: 42m, 4mm, or 4/m 2/m 2/m
- Minute crystals, up to 2 mm, and crystalline, embedded in other selenides
- Massive
- X-ray powder pattern: 2.998 (100), 2.600 (90), 1.771 (80), 2.255 (70), 1.987 (70), 1.656 (60), 3.428 (50)
- Chemical Composition
| Elements |
Content 1 |
Content 2 |
| Tl |
42.3 |
42.1 |
| Se |
30.7 |
31.0 |
| Cu |
21.8 |
20.3 |
| Fe |
6.0 |
6.0 |
| Total |
100.8 |
99.4 |
- Optical Properties
- R1–R2: (400) 23.5–28.3, (420) 24.7–29.0, (440) 25.7–29.7, (460) 26.5–30.5, (480) 26.6–30.6, (500) 27.0–30.7, (520) 27.1–30.6, (540) 26.6–29.9, (560) 26.5–29.4, (580) 26.1–28.8, (600) 26.0–28.8, (620) 26.1–28.8, (640) 26.7–29.1, (660) 27.9–29.7, (680) 28.7–30.3, (700) 29.9–31.3
- Pleochroism: Weak, creamy gray to gray
- Estimated Properties
| Electron density |
Bulk density (electron density) = 6.33 g/cm3
note: Specific gravity of bukovite = 7.48 g/cm3 |
| Photoelectric |
PEBukovite = barns/electron
U=PEBukovite x ρ electron density= barns/cm3 |
| Fermion index |
Fermion index = 0.02
Boson index = 0.98 |
Radioactivity
|
Bukovite is not radioactive
|
How to Identify Bukovite
Bukovite can be identified in the field by its color variations such as grey brown and black. Its opaque form has {001} good and {100} distinct cleavage. The density of bukovite is 7.36 g/cm3 with a hardness of 2- approximate to gypsum.
Occurrence of Bukovite and Useful Mineral Association
Bukovite occurs in selenium-bearing veins of hydrothermal origin. It is often associated with minerals such as clausthalite, eucairite, cham´eanite, berzelianite, klockmannite, sabatierite, crookesite, ferroselite, cadmoselite, pyrite, dolomite, eskebornite, marcasite, chalcopyrite, chalcocite, umangite, bornite, uraninite, hematite, goethite, calcite, quartz, and hakite.
References