Olkhonskite

General Information:
 Chemical Formula:
(Cr+++,V+++)2Ti3O9
 Composition:
(Molecular Weight = 391.10 gm)
Titanium 36.73 % Ti
Vanadium 6.51 % V 
Chromium 19.94 % Cr
Oxygen 36.82 % O 
 Empirical Formula:
Cr1.5V3+0.5Ti3O9
 Environment:
In quartzite-schists.
 IMA Status:
Approved IMA
 Locality:
On the western shore of Lake Baikal, 4.5 km south of the Olkhon Island, Russia.
 Name Origin:
For the locality.
Physical Properties:
 Cleavage:
None
 Color:
black.
 Density:
4.48
 Diaphaniety:
Opaque
 Habits:
Platy - Sheet forms (e.g. micas)., Disseminated - Occurs in small, distinct particles dispersed in matrix.,
 Hardness:
8 - Topaz
 Luster:
Metallic
 Streak:
black
More details...