Mineralogy Database

Guanajuatite Mineral Data

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General Guanajuatite Information

Help on Chemical  Formula: Chemical Formula: Bi2Se3
Help on Composition: Composition: Molecular Weight = 654.84 gm
   Bismuth   63.83 %  Bi
   Selenium  36.17 %  Se
            100.00 % 
Help on Empirical Formula: Empirical Formula: Bi2Se3
Help on Environment: Environment: In hydrothermal deposits of low to moderate temperatures.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1873
Help on Locality: Locality: In the Santa Catarina and La Industrial mines, Sierra de Santa Rosa, near Guanajuato, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the locality.
Help on Name Pronunciation: Name Pronunciation: Guanajuatite + Pronunciation Say GUANAJUATITE
Help on Synonym: Synonym: ICSD 60205
  PDF 77-2016

Guanajuatite Image

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Comments: Prismatic crystalline guanajuatite, altering to a blue crust, in white calcite.
Location: Falun, Kopparberg, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Guanajuatite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.986:1:0.3632
Help on Cell Dimensions: Cell Dimensions: a = 11.32, b = 11.48, c = 4.17, Z = 4; V = 541.91 Den(Calc)= 8.03
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.19(1), 3.65(0.9), 1.989(0.7),

Physical Properties of Guanajuatite

Help on Cleavage: Cleavage: {010} Distinct, {001} Indistinct
Help on Color: Color: Lead gray, Bluish gray.
Help on Density: Density: 6.25 - 6.98, Average = 6.61
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5-3.5 - Finger Nail-Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: gray

Optical Properties of Guanajuatite

Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: White with a yellowish hue.
Help on RL Pleochroism: RL Pleochroism: Distinct.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Guanajuatite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   41.20   51.80 
 420 nm   41.80   51.80 
 440 nm   42.30   51.90 
 460 nm   42.80   51.90 
 480 nm   43.30   52.00 
 500 nm   43.30   52.00 
 520 nm   43.30   52.00 
 540 nm   43.10   52.00 
 560 nm   42.90   52.00 
 580 nm   42.70   52.20 
 600 nm   42.40   52.20 
 620 nm   42.20   52.10 
 640 nm   41.90   51.90 
 660 nm   41.50   51.60 
 680 nm   41.20   51.20 
 700 nm   40.80   50.70 
Calculated Relative Intensity Colors of Guanajuatite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210%

Calculated Properties of Guanajuatite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.57 gm/cc
note: Specific Gravity of Guanajuatite =8.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEGuanajuatite =1,285.88 barns/electron
U=PEGuanajuatite x rElectron Density=8,451.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Guanajuatite is Not Radioactive

Guanajuatite 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
  (02.11.02)Stibnite Group (Orthorhombic: Pbnm) Stibnite Sb2S3 Pbnm 2/m 2/m 2/m Antimonselite Sb2Se3 Pbnm 2/m 2/m 2/m Bismuthinite Bi2S3 Pbnm 2/m 2/m 2/m Guanajuatite Bi2Se3 Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.DB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DB -M:S = 2:3 and similar
02.DB.05a Antimonselite Sb2Se3 Pbnm 2/m 2/m 2/m
02.DB.05a Bismuthinite Bi2S3 Pbnm 2/m 2/m 2/m
02.DB.05a Guanajuatite Bi2Se3 Pbnm 2/m 2/m 2/m
02.DB.05a Metastibnite Sb2S3 None
02.DB.05a Stibnite Sb2S3 Pbnm 2/m 2/m 2/m

Other Guanajuatite 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 Guanajuatite :
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.DB.05a





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