Blakeite Mineral Data

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.

IMA Status:

Not Approved IMA

Locality:

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

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

Optical Data:

Isotropic, n=2.16.

Calculated Properties of Blakeite

Electron Density:

r_electron=2.72 gm/cc
note: r_Blakeite=3.10 gm/cc.

Fermion Index

Fermion Index = 0.05172
Boson Index = 0.94828

Photoelectric:

PE_Blakeite= 215.54 barns/electron
U=PE_Blakeite x r_electron= 586.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Blakeite is Not Radioactive

Blakeite Classification

Dana Class:

28.0.0.0 (28)Sulfate Minerals

(28.0)Without Dana Classification Numbers

(Tellurate)

Strunz Class:

IV/K.09-10 IV - Oxides

IV/K - Sulfides, selenides, tellurides with [XO3]2- groups and related structures

IV/K.09 - Blakeite ? - Poughite series

IV/K.09-10 Blakeite Fe2(TeO3)3 Cubic ? Cubic

IV/K.09-20 Sonoraite FeTeO3(OH)·(H2O) P 2₁/c 2/m

IV/K.09-30 Emmonsite Fe2Te3O9·2(H2O) P1 1

IV/K.09-40 Rodalquilarite H3Fe2(TeO3)4Cl P1 or P1 Tri

IV/K.09-50 Poughite Fe2(TeO3)2(SO4)·3(H2O) Pmnb 2/m 2/m 2/m

Other Blakeite Information

References:

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

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Blakeite

Fe2(TeO3)3
Dana No: Unknown Strunz No: IV/K.09-10
Locality:

Notes: