Mineralogy Database

Paraguanajuatite Mineral Data

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General Paraguanajuatite Information

Help on Chemical  Formula: Chemical Formula: Bi2(Se,S)3
Help on Composition: Composition: Molecular Weight = 691.82 gm
   Bismuth   60.41 %  Bi
   Selenium  25.68 %  Se
   Sulfur    13.91 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Bi2Se2.25S3
Help on Environment: Environment: Intergrown with guanajuatite in contact metamorhpic as wall as in hydrothermal veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1948
Help on Locality: Locality: Santa Catarina mine, Sierra de Santa Rosa, Guanajuato, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the supposed relationship to guanajuatite.
Help on Name Pronunciation: Name Pronunciation: Paraguanajuatite + Pronunciation Say PARAGUANAJUATITE
Help on Synonym: Synonym: ICSD 20385
  PDF 33-214

Paraguanajuatite Image

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  Platynite   Paraguanajuatite

Comments: Bright metallic gray platy crystalline platynite, with dull black paraguanajuatite.
Location: Falun, Kopparberg, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Paraguanajuatite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:6.92363
Help on Cell Dimensions: Cell Dimensions: a = 4.125, c = 28.56, Z = 3; V = 420.86 Den(Calc)= 8.19
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): 3.03(1), 2.23(0.6), 1.404(0.4),

Physical Properties of Paraguanajuatite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Lead gray, Yellowish white.
Help on Density: Density: 6.6
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray

Optical Properties of Paraguanajuatite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Pleochroism: RL Pleochroism: Distinct in air.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Paraguanajuatite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   47.00   51.70 
 420 nm   48.10   52.60 
 440 nm   49.20   53.50 
 460 nm   50.00   54.20 
 480 nm   50.50   54.60 
 500 nm   50.90   55.00 
 520 nm   51.10   55.10 
 540 nm   51.00   55.00 
 560 nm   50.80   54.60 
 580 nm   50.50   54.20 
 600 nm   50.00   53.70 
 620 nm   49.50   53.00 
 640 nm   48.80   52.20 
 660 nm   48.20   51.50 
 680 nm   47.40   50.60 
 700 nm   46.50   49.80 
Calculated Relative Intensity Colors of Paraguanajuatite in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180%

Calculated Properties of Paraguanajuatite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.88 gm/cc
note: Specific Gravity of Paraguanajuatite =8.19 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEParaguanajuatite =1,180.03 barns/electron
U=PEParaguanajuatite x rElectron Density=8,116.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paraguanajuatite is Not Radioactive

Paraguanajuatite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.11)where Am Bn Xp, with (m+n):p=2:3
  (02.11.07)Tetradymite Group (Trigonal: R-3m) Tetradymite Bi2Te2S R 3m 3 2/m Tellurobismuthite Bi2Te3 R 3m 3 2/m Tellurantimony Sb2Te3 R 3m 3 2/m Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m Skippenite Bi2Se2(Te,S) R 3m 3 2/m Vihorlatite! Bi24Se17Te4 P 3m1 3 2/m
Help on  Strunz Class: Strunz Class: 02.DC.05c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DC -Variable M:S
02.DC.05c Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m
02.DC.05c Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m
02.DC.05c Skippenite Bi2Se2(Te,S) R 3m 3 2/m
02.DC.05c Tetradymite Bi2Te2S R 3m 3 2/m
02.DC.05c Tellurantimony Sb2Te3 R 3m 3 2/m
02.DC.05c Tellurobismuthite Bi2Te3 R 3m 3 2/m

Other Paraguanajuatite 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 Paraguanajuatite :
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.DC.05c





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