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.

Name Pronunciation:

Winstanleyite + Pronunciation

Synonym:

ICSD 9076

PDF 34-1485

Winstanleyite Image

Images:

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 - Diploidal H-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),

Physical Properties of Winstanleyite

Cleavage:

None

Color:

Yellow, Light brown.

Density:

5.57

Diaphaneity:

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
Ncalc = 2.27 - 2.29

Optical Data:

Isotropic, n=2.34.

Calculated Properties of Winstanleyite

Electron Density:

Bulk Density (Electron Density)=4.88 gm/cc
note: Specific Gravity of Winstanleyite =5.63 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

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

Radioactivity:

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

Winstanleyite Classification

Dana Class:

34.05.02.01 (34)Selenites - Tellurites - Sulfites

(34.05)Dana Type

(34.05.02)Dana Group

34.05.02.01 Winstanleyite TiTe3O8 I 2₁/a3 2/m 3

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

Strunz Class:

04.JK.05 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.05 Walfordite! (Fe,Te)Te3O8 I2, I a3 Cubic

04.JK.05 Winstanleyite TiTe3O8 I 2₁/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 - 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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Winstanleyite

TiTe++++3O8
Dana No: 34.05.02.01 Strunz No: 04.JK.05
Locality:

Notes:

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