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Paraguanajuatite Mineral Data
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General Paraguanajuatite Information
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 Chemical Formula: |
Bi2(Se,S)3 |
| Composition: |
Molecular Weight = 691.82 gm |
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Bismuth 60.41 % Bi |
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Selenium 25.68 % Se |
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Sulfur 13.91 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Bi2Se2.25S3 |
| Environment: |
Intergrown with guanajuatite in contact metamorhpic as wall as in hydrothermal veins. |
| IMA Status: |
Valid Species (Pre-IMA) 1948 |
| Locality: |
Santa Catarina mine, Sierra de Santa Rosa, Guanajuato, Mexico. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the supposed relationship to guanajuatite. |
| Name Pronunciation: |
Paraguanajuatite + Pronunciation  |
| Synonym: |
ICSD 20385 |
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PDF 33-214 |
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Paraguanajuatite Image |
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Images:
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Paraguanajuatite Crystallography
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| Axial Ratios: |
a:c = 1:6.92363 |
| Cell Dimensions: |
a = 4.125, c = 28.56, Z = 3; V = 420.86 Den(Calc)= 8.19 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.03(1), 2.23(0.6), 1.404(0.4), |
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Physical Properties of Paraguanajuatite
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| Cleavage: |
{0001} Perfect |
| Color: |
Lead gray, Yellowish white. |
| Density: |
6.6 |
| Diaphaneity: |
Opaque |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Hardness: |
2.5-3 - Finger Nail-Calcite |
| Luster: |
Metallic |
| Streak: |
gray |
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Optical Properties of Paraguanajuatite
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| RL Anisotrophism: |
Distinct. |
| RL Pleochroism: |
Distinct in air. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Paraguanajuatite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
47.00 |
51.70 |
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| 420 nm |
48.10 |
52.60 |
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| 440 nm |
49.20 |
53.50 |
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| 460 nm |
50.00 |
54.20 |
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| 480 nm |
50.50 |
54.60 |
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| 500 nm |
50.90 |
55.00 |
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| 520 nm |
51.10 |
55.10 |
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| 540 nm |
51.00 |
55.00 |
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| 560 nm |
50.80 |
54.60 |
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| 580 nm |
50.50 |
54.20 |
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| 600 nm |
50.00 |
53.70 |
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| 620 nm |
49.50 |
53.00 |
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| 640 nm |
48.80 |
52.20 |
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| 660 nm |
48.20 |
51.50 |
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| 680 nm |
47.40 |
50.60 |
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| 700 nm |
46.50 |
49.80 |
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Calculated Relative Intensity Colors of Paraguanajuatite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
| R1 |
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| R2 |
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Calculated Properties of Paraguanajuatite
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| Electron Density: |
Bulk Density (Electron Density)=6.88 gm/cc
note: Specific Gravity of Paraguanajuatite =8.19 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEParaguanajuatite =1,180.03 barns/electron
U=PEParaguanajuatite x rElectron Density=8,116.32 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paraguanajuatite is Not Radioactive |
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Paraguanajuatite Classification
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| Dana Class: |
02.11.07.04 (02)Sulfides - Including Selenides and Tellurides |
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(02.11)where Am Bn Xp, with (m+n):p=2:3 |
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(02.11.07)Tetradymite Group (Trigonal: R-3m) |
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02.11.07.01 Tetradymite Bi2Te2S R 3m 3 2/m |
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02.11.07.02 Tellurobismuthite Bi2Te3 R 3m 3 2/m |
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02.11.07.03 Tellurantimony Sb2Te3 R 3m 3 2/m |
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02.11.07.04 Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m |
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02.11.07.05 Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m |
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02.11.07.06 Skippenite Bi2Se2(Te,S) R 3m 3 2/m |
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02.11.07.07 Vihorlatite! Bi24Se17Te4 P 3m1 3 2/m |
| Strunz Class: |
02.DC.05c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.D - Metal Sulfides, M:S = 3:4 and 2:3 |
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02.DC -Variable M:S |
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02.DC.05c Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m |
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02.DC.05c Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m |
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02.DC.05c Skippenite Bi2Se2(Te,S) R 3m 3 2/m |
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02.DC.05c Tetradymite Bi2Te2S R 3m 3 2/m |
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02.DC.05c Tellurantimony Sb2Te3 R 3m 3 2/m |
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02.DC.05c Tellurobismuthite Bi2Te3 R 3m 3 2/m |
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Other Paraguanajuatite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Paraguanajuatite Specimen Label here :
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Paraguanajuatite
Bi2(Se,S)3
Dana No: 02.11.07.04 Strunz No: 02.DC.05c
Locality:
Notes:
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