Mineralogy Database

Olkhonskite Mineral Data

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General Olkhonskite Information

Help on Chemical  Formula: Chemical Formula: (Cr+++,V+++)2Ti3O9
Help on Composition: Composition: Molecular Weight = 391.10 gm
   Titanium  36.73 %  Ti   61.27 % TiO2
   Vanadium   6.51 %  V     9.58 % V2O3
   Chromium  19.94 %  Cr   29.15 % Cr2O3
   Oxygen    36.82 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cr1.5V3+0.5Ti3O9
Help on Environment: Environment: In quartzite-schists.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: On the western shore of Lake Baikal, 4.5 km south of the Olkhon Island, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Olkhonskite + Pronunciation Say OLKHONSKITE
Help on Synonym: Synonym: IMA1993-035
 

Olkhonskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4003:1:3.7509
Help on Cell Dimensions: Cell Dimensions: a = 7.03, b = 5.02, c = 18.83, Z = 4; beta = 119.6° V = 577.80 Den(Calc)= 4.50
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.386(1), 2.75(1), 2.88(0.7),
 

Physical Properties of Olkhonskite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 4.48
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 8 - Topaz
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Olkhonskite

Help on Optical Data: Optical Data: NCalc= 2.58 - from Gladstone-Dale relationship (KC = 0.3521) where Ncalc=Dcalc*KC+1
NCalc= 2.58 - from Gladstone-Dale relationship (KC = 0.3521) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Bireflectance: RL Bireflectance: Noticeable.
Help on RL Color: RL Color: Light gray.
Help on RL Pleochroism: RL Pleochroism: Weak in brownish tints.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Olkhonskite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 440 nm   22.50   19.60 
   
 460 nm   21.10   18.20 
 480 nm   20.10   18.20 
 500 nm   20.30   18.20 
 520 nm   19.80   18.40 
 540 nm   20.00   18.50 
 560 nm   20.30   18.50 
 580 nm   20.20   18.40 
 600 nm   20.10   18.40 
 620 nm   20.50   18.40 
 640 nm   21.00   18.50 
 660 nm   21.30   19.50 
 680 nm   22.40   20.70 
 700 nm   22.60   20.80 
Calculated Relative Intensity Colors of Olkhonskite in Air
Relative
Intensity
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450% 480%
R1                      
R2                      
 

Calculated Properties of Olkhonskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.27 gm/cc
note: Specific Gravity of Olkhonskite =4.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEOlkhonskite = 11.98 barns/electron
U=PEOlkhonskite x rElectron Density= 51.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Olkhonskite is Not Radioactive
 

Olkhonskite Classification

Help on  Dana Class: Dana Class: 08.04.01.02 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.04)with miscellaneous formulae
  (08.04.01)Schreyerite Group
 
08.04.01.01 Schreyerite V2Ti3O9 C 2/c 2/m
 
08.04.01.02 Olkhonskite (Cr,V)2Ti3O9 Unk Mono
 
08.04.01.03 Kyzylkumite V2Ti3O9 Unk Mono
Help on  Strunz Class: Strunz Class: 04.CB.35 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.35 Olkhonskite (Cr,V)2Ti3O9 Unk Mono
 
04.CB.35 Schreyerite V2Ti3O9 C 2/c 2/m
 

Other Olkhonskite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(AntBidBlaNic3, MinRec v 27, p 304)
Help on See Also: See Also: Links to other databases for Olkhonskite :
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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Print or Cut-and-Paste your Olkhonskite Specimen Label here :

Olkhonskite

(Cr+++,V+++)2Ti3O9
Dana No: 08.04.01.02 Strunz No: 04.CB.35
Locality:

 

Notes:

 

 
   
 


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