Karelianite Mineral Data

Karelianite Mineral Data +

General Karelianite Information

Chemical Formula:

V2O3

Composition:

Molecular Weight = 149.88 gm

Vanadium 67.98 % V 100.00 % V₂O₃

Oxygen 32.02 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

V³⁺₂O₃

Environment:

In sulfide-rich protions of glacial boulders derived from high-grade metamorphic rocks (schists and quartzites).

IMA Status:

Approved IMA 1963

Locality:

Outokumpu, Karelia, Finland. Link to MinDat.org Location Data.

Name Origin:

Named for the Karelian shist belt were the mineral occurs.

Synonym:

ICSD 201106

PDF 34-187

Karelianite Image

Images:

Karelianite

Comments: Dark bluish-black granular karelianite.
Location: Outokumpu, Pohjois-Karjala, Finland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Karelianite Crystallography

Axial Ratios:

a:c = 1:2.8016

Cell Dimensions:

a = 4.99, c = 13.98, Z = 6; V = 301.47 Den(Calc)= 4.95

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3c

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

By Intensity(I/I_o): 2.7132(1), 1.699(0.85), 2.4774(0.8),

Crystal Structure:

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Newnham R E , de Haan Y M , Zeitschrift fur Kristallographie , 117 (1962) p.235-237, Refinement of the alpha Al2O3, Ti2O3, V2O3 and Cr2O3 structures, Locality: synthetic

Physical Properties of Karelianite

Cleavage:

None

Color:

Black.

Density:

4.87

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

8-9

Luster:

Metallic

Streak:

black

Optical Properties of Karelianite

Optical Data:

Uniaxial (?).

NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.279) where Ncalc=Dcalc*KC+1
NCalc= 2.36 - from Gladstone-Dale relationship (KC = 0.279) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Strong, reddish brown to gray.

RL Bireflectance:

Weak.

RL Color:

Brownish olive-gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Karelianite in Air**
λ	R	∑ R(λ)
400 nm	14.30
420 nm	14.40
440 nm	14.50
460 nm	14.80
480 nm	15.20
500 nm	15.80
520 nm	16.30
540 nm	16.80
560 nm	17.20
580 nm	17.60
600 nm	18.00
620 nm	18.30
640 nm	18.70
660 nm	19.20
680 nm	19.80
700 nm	20.60

**Calculated Relative Intensity Colors of Karelianite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	540%	600%
R

Calculated Properties of Karelianite

Electron Density:

r_electron=4.62 gm/cc
note: r_Karelianite=4.95 gm/cc.

Fermion Index

Fermion Index = 0.00185
Boson Index = 0.99815

Photoelectric:

PE_Karelianite= 13.27 barns/electron
U=PE_Karelianite x r_electron= 61.35 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Karelianite is Not Radioactive

Karelianite Classification

Dana Class:

4.3.1.4 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.1)Corundum-Hematite group (Rhombohedral: R3¯c)

4.3.1.1 Corundum Al2O3 R 3c 3 2/m

4.3.1.2 Hematite Fe2O3 R 3c 3 2/m

4.3.1.3 Eskolaite Cr2O3 R 3c 3 2/m

4.3.1.4 Karelianite V2O3 R 3c 3 2/m

Strunz Class:

IV/C.04-40 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.04 - Hematite group

IV/C.04-10 Corundum Al2O3 R 3c 3 2/m

IV/C.04-20 Hematite Fe2O3 R 3c 3 2/m

IV/C.04-30 Eskolaite Cr2O3 R 3c 3 2/m

IV/C.04-40 Karelianite V2O3 R 3c 3 2/m

Other Karelianite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

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Karelianite

V2O3
Dana No: 4.3.1.4 Strunz No: IV/C.04-40
Locality:

Notes: