Fairbankite Mineral Data

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.

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 - PinacoidalH-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

Diaphaniety:

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= -0.093 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1763,KPDmeas= 0.1758,KC= 0.1614

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:

r_electron=6.15 gm/cc
note: r_Fairbankite=7.45 gm/cc.

Fermion Index

Fermion Index = 0.14631
Boson Index = 0.85369

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fairbankite is Not Radioactive

Fairbankite Classification

Dana Class:

34.1.2.1 (34)Selenites - Tellurites - Sulfites

(34.1)as A++ XO3

(34.1.2)Dana Group

34.1.2.1 Fairbankite PbTeO3 P1 1

Strunz Class:

IV/K.02-30 IV - Oxides

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

IV/K.02 - Balyakinite - Plumbotellurite series

IV/K.02-10 Balyakinite CuTeO3 Pmcn 2/m 2/m 2/m

IV/K.02-20 Magnolite Hg2TeO3 Pbm2 mm2

IV/K.02-30 Fairbankite PbTeO3 P1 1

IV/K.02-40 Plumbotellurite PbTeO3 Unk Ortho

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 -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 Fairbankite Specimen Label here :

Fairbankite

PbTe++++O3
Dana No: 34.1.2.1 Strunz No: IV/K.02-30
Locality:

Notes: