Mineralogy Database

Yecoraite Mineral Data

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General Yecoraite Information

Help on Chemical  Formula: Chemical Formula: Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9•9(H2O)
Help on Composition: Composition: Molecular Weight = 2,059.88 gm
   Iron        7.40 %  Fe   10.58 % Fe2O3
   Bismuth    50.32 %  Bi   56.10 % Bi2O3
   Tellurium  18.58 %  Te   23.24 % TeO2
   Hydrogen    0.91 %  H     8.16 % H2O
   Oxygen     22.78 %  O
             ______        ______ 
             100.00 %       98.09 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Bi4.96Fe3+2.73(TeO3)(TeO4)2O9•9.33(H2O)
Help on Environment: Environment: Oxidation of tetradymite and pyrite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Yecora, Sonora, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Yecoraite + Pronunciation Say YECORAITE

Yecoraite Image

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Comments: Tan to reddish brown resinous yecoraite coatings on quartz.
Location: Marie Elena Mine, Yecora, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Yecoraite Crystallography

Help on Crystal System: Crystal System: Tetragonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.743(1), 3.212(0.7), 3.722(0.4),

Physical Properties of Yecoraite

Help on Color: Color: Yellow, Resin yellow, Orange.
Help on Density: Density: 5.59
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Resinous
Help on Streak: Streak: yellow

Optical Properties of Yecoraite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.244 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1463,KC= 0.1936
Ncalc = 2.08
Help on Optical Data: Optical Data: Uniaxial (+), w=1.812, e=1.824, bire=0.0120.

Calculated Properties of Yecoraite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.84 gm/cc
note: Specific Gravity of Yecoraite =5.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEYecoraite =1,003.45 barns/electron
U=PEYecoraite x rElectron Density=4,857.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yecoraite is Not Radioactive

Yecoraite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.08)Dana Type
  (34.08.06)Dana Group Yecoraite Bi5Fe3(TeO3)(TeO4)2O9•9(H2O) Unk Tetra
Help on  Strunz Class: Strunz Class: 07.DF.70 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DF -With large and medium-sized cations
07.DF.70 Yecoraite Bi5Fe3(TeO3)(TeO4)2O9•9(H2O) Unk Tetra

Other Yecoraite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 07.DF.70





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