Poubaite
A valid IMA mineral species
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About Poubaite
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
GUID
(UUID V4):
(UUID V4):
4c458fd2-0f0b-43ac-ab19-3b23407a4739
IMA Classification of Poubaite
Approved
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 |
---|---|---|
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). Top of box is 100%. 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
Common Impurities:
Cu
Crystallography of Poubaite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/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-𝑇 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:
Reference:
Cech, F., Vavrin, I. (1978) Poubaite, PbBi2(Se,Te,S)4, a new mineral. Neues Jahrbuch für Mineralogie, Monatshefte: 1978: 9-19.
Synonyms of Poubaite
Other Language Names for Poubaite
Relationship of Poubaite to other Species
Member of:
Other Members of this group:
Aleksite | PbBi2Te2S2 | Trig. 3m (3 2/m) : P3 1m |
Babkinite | Pb2Bi2(S,Se)3 | Trig. |
Kochkarite | PbBi4Te7 | Trig. |
Rucklidgeite | PbBi2Te4 | Trig. 3m (3 2/m) : R3m |
Saddlebackite | Pb2Bi2Te2S3 | Hex. |
Common Associates
Related Minerals - Strunz-mindat Grouping
2.GC. | Clogauite | PbBi4Te4S3 |
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.40b | Kochkarite | PbBi4Te7 |
2.GC.40c | Rucklidgeite | PbBi2Te4 |
2.GC.40e | Babkinite | Pb2Bi2(S,Se)3 |
2.GC.40d | Saddlebackite | Pb2Bi2Te2S3 |
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
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.
Australia | |
| Hassan et al. (2016) +1 other reference |
| Hassan (2017) +1 other reference |
Canada | |
| Johan et al. (1987) |
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 | |
| Lapis 2001 (1) |
Russia | |
| Kalinin (2021) |
Kalinin (2021) |
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Moctezuma, Moctezuma Municipality, Sonora, Mexico