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Yecoraite Mineral Data
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General Yecoraite Information
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 Chemical Formula: |
Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9•9(H2O) |
| Composition: |
Molecular Weight = 2,059.88 gm |
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Iron 7.40 % Fe 10.58 % Fe2O3 |
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Bismuth 50.32 % Bi 56.10 % Bi2O3 |
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Tellurium 18.58 % Te 23.24 % TeO2 |
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Hydrogen 0.91 % H 8.16 % H2O |
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Oxygen 22.78 % O |
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______ ______ |
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100.00 % 98.09 % = TOTAL OXIDE |
| Empirical Formula: |
Bi4.96Fe3+2.73(TeO3)(TeO4)2O9•9.33(H2O) |
| Environment: |
Oxidation of tetradymite and pyrite. |
| IMA Status: |
Approved IMA 1985 |
| Locality: |
Yecora, Sonora, Mexico. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Yecoraite + Pronunciation  |
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Yecoraite Image |
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Images:
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Yecoraite Crystallography
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| Crystal System: |
Tetragonal Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 2.743(1), 3.212(0.7), 3.722(0.4), |
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Physical Properties of Yecoraite
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| Color: |
Yellow, Resin yellow, Orange. |
| Density: |
5.59 |
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
| Habit: |
Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye. |
| Hardness: |
3 - Calcite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Resinous |
| Streak: |
yellow |
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Optical Properties of Yecoraite
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| Gladstone-Dale: |
CI meas= 0.244 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1463,KC= 0.1936
Ncalc = 2.08 |
| Optical Data: |
Uniaxial (+), w=1.812, e=1.824, bire=0.0120. |
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Calculated Properties of Yecoraite
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| Electron Density: |
Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Yecoraite =5.59 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEYecoraite =1,003.45 barns/electron
U=PEYecoraite x rElectron Density=4,857.85 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yecoraite is Not Radioactive |
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Yecoraite Classification
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| Dana Class: |
34.08.06.01 (34)Selenites - Tellurites - Sulfites |
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(34.08)Dana Type |
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(34.08.06)Dana Group |
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34.08.06.01 Yecoraite Bi5Fe3(TeO3)(TeO4)2O9•9(H2O) Unk Tetra |
| Strunz Class: |
07.DF.70 07 - SULFATES (SELENATES, TELLURATES) |
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07.D - Sulfates (selenates, etc.) with additional anions, with H2O |
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07.DF -With large and medium-sized cations |
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07.DF.70 Yecoraite Bi5Fe3(TeO3)(TeO4)2O9•9(H2O) Unk Tetra |
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Other Yecoraite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Yecoraite :
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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Print or Cut-and-Paste your Yecoraite Specimen Label here :
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Yecoraite
Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9•9(H2O)
Dana No: 34.08.06.01 Strunz No: 07.DF.70
Locality:
Notes:
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