Aleksite Mineral Data + Say ALEKSITE


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General Aleksite Information
Help on Chemical Formula: Chemical Formula: PbBi2Te2S2 (?)
Help on Composition: Composition: Molecular Weight = 944.49 gm
   Bismuth    44.25 %  Bi
   Tellurium  27.02 %  Te
   Lead       21.94 %  Pb
   Sulfur      6.79 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: PbBi2Te2S2
Help on Environment: Environment: Of hydrothermal origin.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: In the Alekseev mine, Sutemskii region, Stanovoi Range, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
 

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Aleksite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:18.79405
Help on Cell Dimensions: Cell Dimensions: a = 4.2423, c = 79.73, Z = 6; V = 1,242.67 Den(Calc)= 7.57
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.09(1), 2.12(0.6), 2.25(0.4),
 

Physical Properties of Aleksite

Help on Cleavage: Cleavage: [???] Perfect
Help on Color: Color: Steel gray.
Help on Diaphaniety: Diaphaniety: Opaque
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
 

Optical Properties of Aleksite

Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Color: RL Color: Light pale gray with slight greenish tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Aleksite in Air
λ R  ∑ R(λ) 
 460 nm   51.40   
 480 nm   51.80 
 500 nm   52.70 
 520 nm   52.80 
 540 nm   53.20 
 560 nm   53.10 
 580 nm   53.40 
 600 nm   53.90 
 620 nm   53.90 
 640 nm   54.20 
 660 nm   54.50 
 680 nm   54.40 
 700 nm   54.90 
Calculated Relative Intensity Colors of Aleksite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 170%
R                    
 

Calculated Properties of Aleksite

Help on Electron Density: Electron Density:

relectron=6.16 gm/cc
note: rAleksite =7.57 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.07058
Boson Index = 0.92942
Help on Photoelectric: Photoelectric:

PEAleksite =1,392.30 barns/electron
U=PEAleksite x relectron=8,570.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Aleksite is Not Radioactive
 

Aleksite Classification
Help on Dana Class: Dana Class: 2.6.3.2 (2)Sulfides - Including Selenides and Tellurides
  (2.6)where Am Bn Xp, with (m+n):p=4:3
  (2.6.3)Dana Group
 
2.6.3.1 Kochkarite PbBi4Te7 P 3m1 3 2/m
 
2.6.3.2 Aleksite PbBi2Te2S2(?) P 3m1 3 2/m
 
2.6.3.3 Hedleyite Bi7Te3(?) R 3m 3 2/m
Help on Strunz Class: Strunz Class: II/D.12-20 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.12 - Tetradymite group, Poubaite - Rucklidgeite series
 
II/D.12-10 Kochkarite PbBi4Te7 P 3m1 3 2/m
 
II/D.12-20 Aleksite PbBi2Te2S2(?) P 3m1 3 2/m
 
II/D.12-30 Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m
 
II/D.12-40 Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m
 
II/D.12-50 Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m
 
II/D.12-55 Saddlebackite! Pb2Bi2Te2S3 Unk Hex
 
II/D.12-60 Babkinite! Pb2Bi2(S,Se)3 P 3,P 3m Trig
 

Other Aleksite 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 Aleksite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Aleksite

PbBi2Te2S2 (?)
Dana No: 2.6.3.2 Strunz No: II/D.12-20
Locality:

 

Notes:

 
 
   
 
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