Blakeite Mineral Data

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General Blakeite Information

Chemical Formula:

Fe2(TeO3)3

Composition:

Molecular Weight = 638.49 gm

Iron 17.49 % Fe 25.01 % Fe₂O₃

Tellurium 59.95 % Te 74.99 % TeO₂

Oxygen 22.55 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺₂(TeO₃)₃

Environment:

An inadequately described species. Probably a mixture of tellurite and goethite.

IMA Status:

Valid Species (Pre-IMA) 1944

Locality:

Mohawk mine, Goldfield, Esmeralda County, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named for William P. Blake (1826-1910), a pioneer geologist and mineralogist of the American southwest.

Name Pronunciation:

Blakeite

Blakeite Image

Images:

Blakeite

Comments: Brown crusts of blakeite on quartz.
Location: Goldfield, Esmeralda County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Blakeite Crystallography

Crystal System:

IsometricSpace Group: Cubic ?

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

By Intensity(I/I_o): 3(1), 2.54(0.9), 1.72(0.8),

Physical Properties of Blakeite

Color:

Brown, Dark reddish brown.

Density:

3.1

Hardness:

2-3 - Gypsum-Calcite

Luster:

Earthy (Dull)

Optical Properties of Blakeite

Gladstone-Dale:

CI meas= -0.63 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.3742,KC= 0.2295
Ncalc = 1.71

Optical Data:

Isotropic, n=2.16.

Calculated Properties of Blakeite

Electron Density:

Bulk Density (Electron Density)=2.72 gm/cc
note: Specific Gravity of Blakeite =3.10 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Blakeite= 215.54 barns/electron
U=PE_Blakeite x rElectron Density= 586.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Blakeite is Not Radioactive

Blakeite Classification

Dana Class:

28.00.00.00 (28)Sulfate Minerals

(28.00)Without Dana Classification Numbers

(28.00.00)Tellurate

28.00.00.00 Adranosite (NH4)4NaAl2(SO4)4Cl(OH)2 I 4₁/acd 4mm

28.00.00.00 Blakeite Fe2(TeO3)3 Cubic ? Cubic

28.00.00.00 IMA2008-029 (NH4)3Fe(SO4)3 R 3c 3m

28.00.00.00 IMA2008-040 BiMo2O7(OH)•2H2O P 2₁/m 2/m

28.00.00.00 Radiobarite* (Ba,Ra)SO4 2/m 2/m 2/m

28.00.00.00 Zincosite* ZnSO4 Unk Ortho

Strunz Class:

07.XX.00 07 - SULFATES (SELENATES, TELLURATES)

07.X - Unclassified Strunz SULFATES (SELENATES, TELLURATES)

07.XX -Tellurate

07.XX.00 Blakeite Fe2(TeO3)3 Cubic ? Cubic

07.XX.00 Aiolosite! Na4Bi(SO4)3Cl P 6₃/m 6/m

07.XX.00 Steverustite Pb5(OH)5[Cu(SO3S--)3](H2O)1.67 P 2₁/n 2/m

07.XX.00 Adranosite (NH4)4NaAl2(SO4)4Cl(OH)2 I 4₁/acd 4mm

07.XX.00 Grandviewite! Cu3Al9(SO4)2(OH)29 P 2, Pm or P 2/m Mono

07.XX.00 IMA2009-008 Y2[(UO2)8O6(SO4)4(OH)2]•26H2O P1 1

Other Blakeite Information

References:

NAME( AmMin, v29:211) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Blakeite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ask about Blakeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Blakeite

Fe2(TeO3)3
Dana No: 28.00.00.00 Strunz No: 07.XX.00
Locality:

Notes: