Fairbankite Mineral Data

General Fairbankite Information

Chemical Formula:

PbTe++++O3

Composition:

Molecular Weight = 382.80 gm

Tellurium 33.33 % Te 41.69 % TeO₂

Lead 54.13 % Pb 58.31 % PbO

Oxygen 12.54 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb(TeO₃)

Environment:

Secondary mineral associated with oxidation of lead and telluride-bearing sulfides.

IMA Status:

Approved IMA 1979

Locality:

Grand Central mine, Tombstone, Cochise County, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for N. K. Fairbank.

Name Pronunciation:

Fairbankite + Pronunciation

Fairbankite Image

Images:

Fairbankite Jarosite

Comments: Colorless to white crystals of fairbankite with orangish brown jarosite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Fairbankite Crystallography

Axial Ratios:

a:b:c =1.0984:1:0.9789

Cell Dimensions:

a = 7.81, b = 7.11, c = 6.96, Z = 4; alpha = 117.2°, beta = 93.78°, gamma = 93.4° V = 342.39 Den(Calc)= 7.43

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.265(1), 3.098(0.6), 3.148(0.6),

Physical Properties of Fairbankite

Cleavage:

{???} Indistinct

Color:

Colorless.

Density:

7.45

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

2 - Gypsum

Luster:

Adamantine - Resinous

Streak:

white

Optical Properties of Fairbankite

Gladstone-Dale:

CI meas= -0.09 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.09 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1758,KPDmeas= 0.1758,KC= 0.1614
Ncalc = 2.2

Optical Data:

Biaxial (?), a=2.29, b=2.31, g=2.33, bire=0.0400, 2V(Calc)=88, 2V(Meas)=86.

Calculated Properties of Fairbankite

Electron Density:

Bulk Density (Electron Density)=6.15 gm/cc
note: Specific Gravity of Fairbankite =7.45 gm/cc.

Fermion Index:

Fermion Index = 0.14
Boson Index = 0.86

Photoelectric:

PE_Fairbankite=1,130.45 barns/electron
U=PE_Fairbankite x rElectron Density=6,952.23 barns/cc.

Radioactivity:

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

Fairbankite Classification

Dana Class:

34.01.02.01 (34)Selenites - Tellurites - Sulfites

(34.01)as A++ XO3

(34.01.02)Dana Group

34.01.02.01 Fairbankite PbTeO3 P1 1

Strunz Class:

04.JK.50 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JK -Tellurites without additional anions, without H2O

04.JK.50 Fairbankite PbTeO3 P1 1

Other Fairbankite 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 Fairbankite :
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 Fairbankite Specimen Label here :

Fairbankite

PbTe++++O3
Dana No: 34.01.02.01 Strunz No: 04.JK.50
Locality:

Notes:

Dakota Matrix
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