UM1995-26-S:BiPbTe
Valid as an unnamed mineral
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Formula:
Pb2Bi3Te2S3
Colour:
silvery-gray
Lustre:
Metallic
Specific Gravity:
7.65
Crystal System:
Trigonal
One of 5 similar species co-described, the other 4 being UM1995-25-S:BiPbTe, UM1995-27-S:BiPbTe, UM1995-28-S:BiPbTe, and UM1995-29-S:BiPbTe.
Found in form of lamellar and tabular grains, up to 20 x 20 x 4 mm in size. Either resides in galena and calcite, or is intergrown with aleksite, pyrrhotite, and gold.
Electron microprobe analysis results (wt.%, mean of 2): Bi 36.87, Pb 33.57, Te 20.79, S 8.20, Sb 0.31, Ag 0.04, total 99.78. This corresponds to Pb1.92Bi2.09Sb0.03Te1.93S3.03.
Found in form of lamellar and tabular grains, up to 20 x 20 x 4 mm in size. Either resides in galena and calcite, or is intergrown with aleksite, pyrrhotite, and gold.
Electron microprobe analysis results (wt.%, mean of 2): Bi 36.87, Pb 33.57, Te 20.79, S 8.20, Sb 0.31, Ag 0.04, total 99.78. This corresponds to Pb1.92Bi2.09Sb0.03Te1.93S3.03.
Unique Identifiers
Mindat ID:
53619
Long-form identifier:
mindat:1:1:53619:4
GUID
(UUID V4):
(UUID V4):
e176e68e-87e2-4e7d-b258-66b600f84ed1
Classification of UM1995-26-S:BiPbTe
IMA status notes:
Unnamed (probably valid)
Physical Properties of UM1995-26-S:BiPbTe
Metallic
Colour:
silvery-gray
Hardness:
VHN100=19 - 94 - Vickers
Comment:
VHN5-15; mean VHN: 45
Density:
7.65(5) g/cm3 (Measured)
Optical Data of UM1995-26-S:BiPbTe
Anisotropism:
strong
Bireflectance:
weak to moderate
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
440nm | 46.8% | 40.6% |
480nm | 46.4% | 43.6% |
520nm | 46.8% | 46.4% |
560nm | 47.3% | 47.9% |
600nm | 47.7% | 48.7% |
640nm | 47.9% | 49.3% |
680nm | 48.1% | 49.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 49.9%.
R1 shown in black, R2 shown in red
Colour in reflected light:
white with a grayish brown tint
Chemical Properties of UM1995-26-S:BiPbTe
Formula:
Pb2Bi3Te2S3
Elements listed:
Crystallography of UM1995-26-S:BiPbTe
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Setting:
P3m1
Cell Parameters:
a = 4.247(1) Å, c = 97.97(2) Å
Ratio:
a:c = 1 : 23.068
Unit Cell V:
1,530.34 ų (Calculated from Unit Cell)
Z:
6
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.26 Å | (20- 30) |
3.93 Å | (20) |
3.21 Å | (20) |
3.05 Å | (100) |
2.44 Å | (20) |
2.19 Å | (40) |
2.11 Å | (30) |
1.99 Å | (20) |
1.78 Å | (20) |
1.74 Å | (30) |
1.520 Å | (20) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for UM1995-26-S:BiPbTe
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Spiridonov, E.M. (1995): Minerals of the metamorphosed plutonogenic gold-quartz Kochkar deposit, southern Urals: 1. Gold-telluride ores. Zapiski Vseross. Mineral. Obshch.: 124(6): 24-39 (in Russian, English abs.); in: Jambor, J.L., Kovalenker, V.A., Puziewicz, J., Roberts, A.C. (1996): New mineral names. American Mineralogist: 81: 1285
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016)
Internet Links for UM1995-26-S:BiPbTe
mindat.org URL:
https://www.mindat.org/min-53619.html
Please feel free to link to this page.
Please feel free to link to this page.
Mineral Dealers:
Localities for UM1995-26-S:BiPbTe
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Russia | |
| Spiridonov, E.M. (1995): Minerals of the metamorphosed plutonogenic gold-quartz Kochkar deposit, southern Urals: 1. Gold-telluride ores. Zapiski Vseross. Mineral. Obshch.: 124(6): 24-39 (in Russian, English abs.); in: Jambor, J.L., Kovalenker, V.A., Puziewicz, J., Roberts, A.C. (1996): New mineral names. American Mineralogist: 81: 1285 |