Winstanleyite Mineral Data

Winstanleyite Mineral Data +

General Winstanleyite Information

Chemical Formula:

TiTe++++3O8

Composition:

Molecular Weight = 558.68 gm

Titanium 8.57 % Ti 14.30 % TiO₂

Tellurium 68.52 % Te 85.70 % TeO₂

Oxygen 22.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

TiTe₃O₈

Environment:

Found in a silicified granodiorite dike associated with jarosite, chlorargyrite, and rodalquilarite.

IMA Status:

Approved IMA 1979

Locality:

Grand Central mine, Tumbstone, Arizona. Link to MinDat.org Location Data.

Name Origin:

Named for Betty Jo Winstanley (1934-), amateur mineralogist, who found the first specimen.

Synonym:

ICSD 9076

PDF 34-1485

Winstanleyite Image

Images:

Click Here for Larger Winstanleyite Image

Winstanleyite Jarosite

Comments: Small, yellow octahedral crystal of winstanleyite on brownish red jarosite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 0.9 mm.
© Thomas Witzke / Abraxas-Verlag

Winstanleyite Crystallography

Cell Dimensions:

a = 10.963, Z = 8; V = 1,317.61 Den(Calc)= 5.63

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: I 2₁/a3

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

By Intensity(I/I_o): 3.165(1), 1.938(0.8), 2.741(0.7),

Crystal Structure:

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Bindi L , Cipriani C , The Canadian , Mineralogist (2003) p.1469-1473, The crystal structure of winstanleyite, TiTe3O8, from the, Grand Central Mine, Tombstone, Arizona, Locality: Grand Central Mine, Tombstone, Arizona

Physical Properties of Winstanleyite

Cleavage:

None

Color:

Yellow, Light brown.

Density:

5.57

Diaphaniety:

Transparent

Fracture:

Tough - Difficult to break apart as shown by fibrous minerals and most metals.

Habit:

Cubic Crystals - Occurs as cubic shaped crystals.

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Hardness:

4 - Fluorite

Luster:

Adamantine

Streak:

light yellow

Optical Properties of Winstanleyite

Gladstone-Dale:

CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.238,KPDmeas= 0.2406,KC= 0.2285

Optical Data:

Isotropic, n=2.34.

Calculated Properties of Winstanleyite

Electron Density:

r_electron=4.88 gm/cc
note: r_{Winstanleyite}=5.63 gm/cc.

Fermion Index

Fermion Index = 0.06593
Boson Index = 0.93407

Photoelectric:

PE_{Winstanleyite}= 244.25 barns/electron
U=PE_{Winstanleyite} x r_electron=1,191.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Winstanleyite is Not Radioactive

Winstanleyite Classification

Dana Class:

34.5.2.1 (34)Selenites - Tellurites - Sulfites

(34.5)Dana Type

(34.5.2)Dana Group

34.5.2.1 Winstanleyite TiTe3O8 I 2₁/a3 2/m 3

34.5.2.2 Walfordite! (Fe,Te)Te3O8 I2, I a3 Cubic

Strunz Class:

IV/K.14-10 IV - Oxides

IV/K - Tellurides with [Te3O8]4- groups

IV/K.14 - Winstanleyite - Cliffordite series

IV/K.14-05 Walfordite! (Fe,Te)Te3O8 I2, I a3 Cubic

IV/K.14-10 Winstanleyite TiTe3O8 I 2₁/a3 2/m 3

IV/K.14-20 Cliffordite UTe3O9 P a3 2/m 3

Other Winstanleyite 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 Winstanleyite :
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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Winstanleyite

TiTe++++3O8
Dana No: 34.5.2.1 Strunz No: IV/K.14-10
Locality:

Notes: