Olkhonskite Mineral Data

General Olkhonskite Information

Chemical Formula:

(Cr+++,V+++)2Ti3O9

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

Empirical Formula:

Cr_1.5V³⁺_0.5Ti₃O₉

Environment:

In quartzite-schists.

IMA Status:

Approved IMA 1994

Locality:

On the western shore of Lake Baikal, 4.5 km south of the Olkhon Island, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Olkhonskite + Pronunciation

Synonym:

IMA1993-035

Search for Olkhonskite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Olkhonskite Crystallography

Axial Ratios:

a:b:c =1.4003:1:3.7509

Cell Dimensions:

a = 7.03, b = 5.02, c = 18.83, Z = 4; beta = 119.6° V = 577.80 Den(Calc)= 4.50

Crystal System:

MonoclinicSpace Group: Unk

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

By Intensity(I/I_o): 1.386(1), 2.75(1), 2.88(0.7),

Physical Properties of Olkhonskite

Cleavage:

None

Color:

Black.

Density:

4.48

Diaphaneity:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Disseminated - Occurs in small, distinct particles dispersed in matrix.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

8 - Topaz

Luster:

Metallic

Streak:

black

Optical Properties of Olkhonskite

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

RL Anisotrophism:

Weak.

RL Bireflectance:

Noticeable.

RL Color:

Light gray.

RL Pleochroism:

Weak in brownish tints.

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

Electron Density:

Bulk Density (Electron Density)=4.27 gm/cc
note: Specific Gravity of Olkhonskite =4.50 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Olkhonskite= 11.98 barns/electron
U=PE_Olkhonskite x rElectron Density= 51.13 barns/cc.

Radioactivity:

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

Olkhonskite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(AntBidBlaNic3, MinRec v 27, p 304)

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

Search for Olkhonskite using:

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

Visit our Advertisers for Olkhonskite :

A Bijoux Google Search for Olkhonskite
Adam's Minerals Google Search for Olkhonskite
Cape Minerals Google Search for Olkhonskite
Dakota Matrix Minerals Google Search for Olkhonskite
Excalibur Mineral Corp. Google Search for Olkhonskite
Exceptional Minerals Google Search for Olkhonskite
John Betts Fine Minerals Search for Olkhonskite
McDougall Minerals Google Search for Olkhonskite
Mineral News Website Link
Rock and Mineral Shows Google Search for Olkhonskite
Weinrich Minerals, Inc. Google Search for Olkhonskite

Ask about Olkhonskite 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 Español

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: