Yecoraite Mineral Data

Yecoraite Mineral Data +

General Yecoraite Information

Chemical Formula:

Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9·9(H2O)

Composition:

Molecular Weight = 1,933.37 gm

Iron 8.67 % Fe 12.39 % Fe₂O₃

Bismuth 54.05 % Bi 60.25 % Bi₂O₃

Tellurium 19.80 % Te 24.76 % TeO₂

Hydrogen 0.94 % H 8.39 % H₂O

Oxygen 16.55 % O

______ ______

100.00 % 105.79 % = TOTAL OXIDE

Empirical Formula:

Bi₅Fe³⁺₃(TeO₃)(TeO₄)₂·9(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.

Yecoraite Image

Images:

Yecoraite

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

Crystal System:

TetragonalSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.743(1), 3.212(0.7), 3.722(0.4),

Physical Properties of Yecoraite

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

Optical Properties of Yecoraite

Gladstone-Dale:

CI meas= 0.302 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1463,KC= 0.2095

Optical Data:

Uniaxial (+), w=1.812, e=1.824, bire=0.0120.

Calculated Properties of Yecoraite

Electron Density:

r_electron=4.78 gm/cc
note: r_Yecoraite=5.59 gm/cc.

Fermion Index

Fermion Index = 0.01773
Boson Index = 0.98227

Photoelectric:

PE_Yecoraite=1,090.63 barns/electron
U=PE_Yecoraite x r_electron=5,215.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Yecoraite is Not Radioactive

Yecoraite Classification

Dana Class:

34.8.6.1 (34)Selenites - Tellurites - Sulfites

(34.8)Dana Type

(34.8.6)Dana Group

34.8.6.1 Yecoraite Bi5Fe3(TeO3)(TeO4)2O9·9(H2O) Unk Tetra

Strunz Class:

IV/K.18-10 IV - Oxides

IV/K - Complex Tellurides with [TeO6]6-, [TeO3]2- and [TeO4]2- groups

IV/K.18 - Yecoraite series

IV/K.18-10 Yecoraite Bi5Fe3(TeO3)(TeO4)2O9·9(H2O) Unk Tetra

Other Yecoraite Information

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Yecoraite Specimen Label here :

Yecoraite

Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9·9(H2O)
Dana No: 34.8.6.1 Strunz No: IV/K.18-10
Locality:

Notes: