Mineralogy Database

Poubaite Mineral Data

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General Poubaite Information

Help on Chemical  Formula: Chemical Formula: PbBi2Se2(Te,S)2
Help on Composition: Composition: Molecular Weight = 990.51 gm
   Bismuth    42.20 %  Bi
   Tellurium  19.32 %  Te
   Lead       20.92 %  Pb
   Selenium   15.94 %  Se
   Sulfur      1.62 %  S
             100.00 % 
Help on Empirical Formula: Empirical Formula: PbBi2Se2Te1.5S0.5
Help on Environment: Environment: In hydrothermal dolomite-calcite veins in the western contact of the Bor granite massif.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Oldr�chov, Tachov, Cechy (Bohemia), Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Z. Pouba, economic geologist, Charles University, Prague, Czechoslovakia.
Help on Name Pronunciation: Name Pronunciation: Poubaite Say POUBAITE
Help on Synonym: Synonym: ICSD 20386
  PDF 29-245

Poubaite Image

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Comments: Gray granular crystalline poubaite in white calcite.
Location: Oldrichov, near Tachov, western Bohemia, Zapadocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Poubaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:9.42968
Help on Cell Dimensions: Cell Dimensions: a = 4.252, c = 40.095, Z = 3; V = 627.78 Den(Calc)= 7.86
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.251(1), 3.093(0.4), 2.127(0.2),

Physical Properties of Poubaite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Silver white.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic

Optical Properties of Poubaite

Help on Optical Data: Optical Data: NCalc= 2.18 - from Gladstone-Dale relationship (KC = 0.1505) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Strong in light grayish.
Help on RL Color: RL Color: Creamy white.
Help on RL Pleochroism: RL Pleochroism: Maximum parallel to elongation, creamy.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Poubaite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 420 nm   46.00   50.30 
 440 nm   46.50   51.40 
 460 nm   47.20   52.20 
 480 nm   47.60   52.70 
 500 nm   48.00   53.00 
 520 nm   48.30   53.20 
 540 nm   48.50   53.30 
 560 nm   48.60   53.30 
 580 nm   48.80   53.30 
 600 nm   48.80   53.30 
 620 nm   48.90   53.20 
 640 nm   49.00   53.20 
 660 nm   49.00   53.10 
 680 nm   49.10   53.10 
 700 nm   49.10   53.00 
Calculated Relative Intensity Colors of Poubaite in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%

Calculated Properties of Poubaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.38 gm/cc
note: Specific Gravity of Poubaite =7.86 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEPoubaite =1,319.09 barns/electron
U=PEPoubaite x rElectron Density=8,415.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Poubaite is Not Radioactive

Poubaite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.06)where Am Bn Xp, with (m+n):p=4:3
  (02.06.02)Joseite Group (Trigonal: R-3m) Joseite Bi4(S,Te)3 R 3m 3 2/m Joseite-B Bi4(S,Te)3 R 3m 3 2/m Ikunolite Bi4(S,Se)3 R 3m 3 2/m Laitakarite Bi4(Se,S)3 R 3m 3 2/m Pilsenite Bi4Te3 R 3m 3 2/m Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m Babkinite! Pb2Bi2(S,Se)3 P 3,P 3m Trig
Help on  Strunz Class: Strunz Class: 02.GC.40c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GC -Poly-sulfarsenites
02.GC.40c Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m
02.GC.40c Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m

Other Poubaite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Poubaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.GC.40c





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