Poubaite
A valid IMA mineral species
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About Poubaite
prof. Zdeněk Pouba
Formula:
PbBi2(Se,Te,S)4
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
7.85 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
After Prof. Zdeněk Pouba (8 June 1922 - 27 Dec. 2011), Czech mineralogist, Chair of deposit and economy geology (from 1953 to 1982) in Charles University in Prague, Czech Republic.
Unique Identifiers
Mindat ID:
3271
Long-form identifier:
mindat:1:1:3271:7
IMA Classification of Poubaite
Approved
IMA Formula:
Pb2+Bi3+2(Se2-,Te2-,S2-)4
Approval year:
1975
First published:
1978
Classification of Poubaite
2.GC.40c
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
C : Poly-sulfarsenites
2.6.2.6
2 : SULFIDES
6 : AmBnXp, with (m+n):p = 4:3
2 : SULFIDES
6 : AmBnXp, with (m+n):p = 4:3
3.7.23
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
7 : Sulphides etc. of V, As, Sb and Bi
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
7 : Sulphides etc. of V, As, Sb and Bi
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pub | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Poubaite
Metallic
Transparency:
Opaque
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN25=74 - 122 kg/mm2 - Vickers
Cleavage:
Distinct/Good
distinct parallel to elongation. Perfect on {0001}
distinct parallel to elongation. Perfect on {0001}
Density:
7.85 g/cm3 (Calculated)
Optical Data of Poubaite
Anisotropism:
Strong, in pale grayish blue.
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 420nm | 46.0% | 50.3% |
| 440nm | 46.6% | 51.4% |
| 460nm | 47.2% | 52.2% |
| 480nm | 47.6% | 52.7% |
| 500nm | 48.0% | 53.0% |
| 520nm | 48.3% | 53.2% |
| 540nm | 48.5% | 53.3% |
| 560nm | 48.6% | 53.3% |
| 580nm | 48.8% | 53.3% |
| 600nm | 48.8% | 53.3% |
| 620nm | 48.9% | 53.2% |
| 640nm | 49.0% | 53.2% |
| 660nm | 49.0% | 53.1% |
| 680nm | 49.1% | 53.1% |
| 700nm | 49.1% | 53.0% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 53.3%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Light white with a creamy tint.
Chemistry of Poubaite
Mindat Formula:
PbBi2(Se,Te,S)4
Element Weights:
Common Impurities:
Cu
Crystallography of Poubaite
Crystal System:
Trigonal
Class (H-M):
3m(32/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 4.252 Å, c = 40.095 Å
Ratio:
a:c = 1 : 9.43
Unit Cell V:
627.78 ų (Calculated from Unit Cell)
Z:
3
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014179 | Poubaite | Agaev K A, Semiletov S A (1968) Electron diffraction study of the structure of PbBi2Se4 Kristallografiya 13 258-260 | 1968 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.093 Å | (100) |
| 2.127 Å | (80) |
| 2.251 Å | (70b) |
| 1.752 Å | (60) |
| 1.352 Å | (60) |
| 4.048 Å | (50) |
| 2.727 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Poubaite
General Appearance of Type Material:
Euhedral to subhedral lath-like crystals 30-40 microns, rarely up to 80 microns long, 8-10 microns thick.
Place of Conservation of Type Material:
Charles University, Prague, Czech Republic, 21241; National School of Mines, Paris, France.
Associated Minerals at Type Locality:
Synonyms of Poubaite
Other Language Names for Poubaite
Relationship of Poubaite to other Species
Member of:
Other Members of Aleksite Group:
| Aleksite | PbBi2Te2S2 | Trig. 3m(32/m) : P31m |
| Babkinite | Pb2Bi2(S,Se)3 | Trig. |
| Clogauite | PbBi4Te4S3 | Trig. 3m(32/m) : P3m1 |
| Hitachiite | Pb5Bi2Te2S6 | Trig. 3m : P3m1 |
| Kochkarite | PbBi4Te7 | Trig. |
| Rucklidgeite | PbBi2Te4 | Trig. 3m(32/m) : R3m |
| Saddlebackite | Pb2Bi2Te2S3 | Hex. |
Common Associates
Associations Based on Photo Data:
| 6 photos of Poubaite associated with Součekite | CuPbBi(S,Se)3 |
| 1 photo of Poubaite associated with Kalungaite | PdAsSe |
| 1 photo of Poubaite associated with Guanajuatite | Bi2Se3 |
| 1 photo of Poubaite associated with Bohdanowiczite | AgBiSe2 |
| 1 photo of Poubaite associated with Native Gold | Au |
| 1 photo of Poubaite associated with Chalcopyrite | CuFeS2 |
| 1 photo of Poubaite associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 2.GC.05 | Hatchite | AgTlPbAs2S5 |
| 2.GC.05 | Wallisite | (Cu,Ag)TlPbAs2S5 |
| 2.GC.10 | Sinnerite | Cu6As4S9 |
| 2.GC.15 | Watanabeite | Cu4(As,Sb)2S5 |
| 2.GC.20 | Simonite | TlHgAs3S6 |
| 2.GC.25 | Quadratite | Ag(Cd,Pb)AsS3 |
| 2.GC.25 | Manganoquadratite | AgMnAsS3 |
| 2.GC.30 | Smithite | AgAsS2 |
| 2.GC.35 | Trechmannite | AgAsS2 |
| 2.GC.35 | Debattistiite | Ag9Hg0.5As6S12Te2 |
| 2.GC.40a | Aleksite | PbBi2Te2S2 |
| 2.GC.40d | Saddlebackite | Pb2Bi2Te2S3 |
| 2.GC.40c | Rucklidgeite | PbBi2Te4 |
| 2.GC.40 | Clogauite | PbBi4Te4S3 |
| 2.GC.40e | Babkinite | Pb2Bi2(S,Se)3 |
| 2.GC.40b | Kochkarite | PbBi4Te7 |
| 2.GC.45 | Tvalchrelidzeite | Hg3SbAsS3 |
| 2.GC.50 | Mutnovskite | Pb4As2S6ICl |
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.
Internet Links for Poubaite
mindat.org URL:
https://www.mindat.org/min-3271.html
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References for Poubaite
Localities for Poubaite
Showing 11 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| - (2016) +3 other references |
Canada | |
| Johan et al. (1987) |
| Kasprowicz (2023) |
Czech Republic (TL) | |
| Bernard JH et al. Mineralogie ... +1 other reference |
| Havelcová et al. (2020) |
Japan | |
| 島倉広至 et al. (2015) |
| Int Geol Congr (2008) |
| Nakata et al. (2011) | |
Mexico | |
| Braith et al. (2001) |
Russia | |
| Kalinin (2021) |
| Kalinin (2021) |
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Oldřichov, Tachov, Tachov District, Plzeň Region, Czech Republic