Mineralogy Database

Tistarite Mineral Data

Search Webmineral :

General Tistarite Information

Help on Chemical  Formula: Chemical Formula: Ti2O3
Help on Composition: Composition: Molecular Weight = 142.66 gm
   Magnesium   1.19 %  Mg
   Zirconium   0.64 %  Zr
   Titanium   63.77 %  Ti
   Aluminum    0.76 %  Al
   Oxygen     33.64 %  O
             100.00 % 
Help on Empirical Formula: Empirical Formula: Ti1.9O3Al0.04Zr0.01Mg0.07
Help on Environment: Environment: Found as one subhedral crystal in a cluster of micrometer-sized refractory grains along with khamrabaevite (TiC), rutile, and corundum crystals within a chondrule. Corundum group.
Help on IMA Status: IMA Status: Approved IMA 2008 (Dana # Added)
Help on Locality: Locality: Allende meteorite, Pueblito de Allende, Chihuahua, Mexico Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the composition "Ti" and the word "star," implying that this new refractory mineral is among the first solids formed in the solar system.
Help on Synonym: Synonym: IMA2008-016

Tistarite Image

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

  Tistarite   Khamrabaevite

Comments: BSE image showing one tistarite (Ti2O3) grain along with khamrabaevite (TiC) and corundum. The cross marks where the electron back-scattered diffraction pattern (shown in Fig. 4) was collected. (AmMin, v94:841.
Location: From inside a chondrule from the Allende meteorite. Scale: See Image.
© American Mineralogist

Tistarite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.63881
Help on Cell Dimensions: Cell Dimensions: a = 5.158, c = 13.611, Z = 4; V = 313.61 Den(Calc)= 3.02
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.7033(1), 2.579(0.9), 2.707(0.88),3.734(0.84), 1.489(0.46), 2.242(0.38), 1.8672(0.33), 1.5124(0.28),

Physical Properties of Tistarite

Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Unknown - Minerals too small to observe fractures.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 8.5 - Chrysoberyl
Help on Luster: Luster: Metallic

Optical Properties of Tistarite

Help on Optical Data: Optical Data: NCalc= 1.8 - from Gladstone-Dale relationship (KC = 0.2643) where Ncalc=Dcalc*KC+1

Calculated Properties of Tistarite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Tistarite =3.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PETistarite = 11.59 barns/electron
U=PETistarite x rElectron Density= 33.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tistarite is Not Radioactive

Tistarite Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.03)with a cation charge of 3+ (A+++2 O3)
  (04.03.01)Corundum-Hematite group (Rhombohedral: R-3c) Corundum Al2O3 R 3c 3 2/m Hematite Fe2O3 R 3c 3 2/m Eskolaite Cr2O3 R 3c 3 2/m Karelianite V2O3 R 3c 3 2/m Tistarite! Ti2O3 R 3c 3 2/m
Help on  Strunz Class: Strunz Class: 04.CB.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.C - Metal:Oxygen = 2:3, 3:5, and Similar
  04.CB -With medium-sized cations
04.CB.05 Auroantimonate* AuSbO3 Ortho ? Ortho
04.CB.05 Geikielite MgTiO3 R 3 3
04.CB.05 Brizziite-III NaSbO3 R 3 3
04.CB.05 Brizziite-VII NaSbO3 R 3 3
04.CB.05 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3
04.CB.05 Corundum Al2O3 R 3c 3 2/m
04.CB.05 Eskolaite Cr2O3 R 3c 3 2/m
04.CB.05 Hematite Fe2O3 R 3c 3 2/m
04.CB.05 Karelianite V2O3 R 3c 3 2/m
04.CB.05 Ilmenite FeTiO3 R 3 3
04.CB.05 Melanostibite Mn(Sb,Fe)O3 R 3 3
04.CB.05 Pyrophanite MnTiO3 R 3 3
04.CB.05 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig
04.CB.05 Tistarite! Ti2O3 R 3c 3 2/m

Other Tistarite Information

Help on References: References: NAME( AmMin, v94:841) PHYS. PROP.(AmMin, v94:841) OPTIC PROP.(AmMin, v94:841)
Help on See Also: See Also: Links to other databases for Tistarite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Tistarite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Tistarite :

Ask about Tistarite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa´┐Żol

Print or Cut-and-Paste your Tistarite Specimen Label here :


Dana No: Strunz No: 04.CB.05





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.