Mineralogy Database

Winstanleyite Mineral Data

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General Winstanleyite Information

Help on Chemical  Formula: Chemical Formula: TiTe++++3O8
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: TiTe3O8
Help on Environment: Environment: Found in a silicified granodiorite dike associated with jarosite, chlorargyrite, and rodalquilarite.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Grand Central mine, Tumbstone, Arizona. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Betty Jo Winstanley (1934-), amateur mineralogist, who found the first specimen.
Help on Name Pronunciation: Name Pronunciation: Winstanleyite + Pronunciation Say WINSTANLEYITE
Help on Synonym: Synonym: ICSD 9076
  PDF 34-1485

Winstanleyite Image

Click Here for Larger   Image in a New Browser Window Images:
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  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

Help on Cell Dimensions: Cell Dimensions: a = 10.963, Z = 8; V = 1,317.61 Den(Calc)= 5.63
Help on Crystal System: 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/Io): 3.165(1), 1.938(0.8), 2.741(0.7),

Physical Properties of Winstanleyite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Light brown.
Help on Density: Density: 5.57
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Tough - Difficult to break apart as shown by fibrous minerals and most metals.
Help on Habit: Habit: Cubic Crystals - Occurs as cubic shaped crystals.
Help on Habit: Habit: Octahedral Crystals - Occurs as octahedral shaped crystals.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light yellow

Optical Properties of Winstanleyite

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Isotropic, n=2.34.

Calculated Properties of Winstanleyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.88 gm/cc
note: Specific Gravity of Winstanleyite =5.63 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEWinstanleyite = 244.25 barns/electron
U=PEWinstanleyite x rElectron Density=1,191.31 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Winstanleyite is Not Radioactive

Winstanleyite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.05)Dana Type
  (34.05.02)Dana Group Winstanleyite TiTe3O8 I 21/a3 2/m 3 Walfordite! (Fe,Te)Te3O8 I2, I a3 Cubic
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 04.JK.05





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