Isovite Mineral Data

Isovite Mineral Data

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General Isovite Information

Chemical Formula:

(Cr,Fe)23C6

Composition:

Molecular Weight = 1,249.48 gm

Chromium 67.41 % Cr

Iron 26.82 % Fe

Carbon 5.77 % C

______

100.00 %

Empirical Formula:

Cr_16.2Fe²⁺₆C₆

Environment:

The chromium dominant analog of haxonite. Found in gold-platinum placer concentrates

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

The Is River, near the town of Is, Isovsky district, Middle Urals, Russia. Link to MinDat.org Location Data.

Name Origin:

For the locality.

Synonym:

IMA1996-039

Isovite Image

Images:

Isovite

Comments: Dark gray metallic grain of isovite.
Location: Verkhneivinsk, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Grain size 0.7 mm.
© Thomas Witzke / Abraxas-Verlag

Isovite Crystallography

Cell Dimensions:

a = 10.65, Z = 4; V = 1,207.95 Den(Calc)= 6.87

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m

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

By Intensity(I/I_o): 2.05(1), 2.17(0.5), 2.38(0.3),

Physical Properties of Isovite

Color:

Iron gray.

Diaphaniety:

Opaque

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

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

Hardness:

8 - Topaz

Luster:

Metallic

Magnetism:

Ferromagnetic

Optical Properties of Isovite

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Isovite in Air**
λ	R	∑ R(λ)
460 nm	46.70
480 nm	42.40
540 nm	43.90
560 nm	43.30
580 nm	47.60
600 nm	47.40
640 nm	46.20
660 nm	45.30

**Calculated Relative Intensity Colors of Isovite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R

Calculated Properties of Isovite

Electron Density:

r_electron=6.39 gm/cc
note: r_Isovite=6.87 gm/cc.

Fermion Index

Fermion Index = 0.07036
Boson Index = 0.92964

Photoelectric:

PE_Isovite= 23.92 barns/electron
U=PE_Isovite x r_electron= 152.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Isovite is Not Radioactive

Isovite Classification

Dana Class:

1.1.16.3 (1)Native Elements

(1.1)with metallic elements other than the platinum group

(1.1.16)Dana Group

1.1.16.1 Cohenite (Fe,Ni,Co)3C Pbnm 2/m 2/m 2/m

1.1.16.2 Haxonite (Fe,Ni)23C6 F m3m 4/m 3 2/m

1.1.16.3 Isovite ! (Cr,Fe)23C6 F m3m 4/m 3 2/m

Strunz Class:

I/A.09-35 I - Elements

I/A - Metallic and intermetallic compounds, Carbides, Nitrides, Phosphides and Silicides

I/A.09 - Honquiite-Tantalcarbide series

I/A.09-10 Hongquiite* TiO F m3m 4/m 3 2/m

I/A.09-20 Khamrabaevite (Ti,V,Fe)C F m3m 4/m 3 2/m

I/A.09-30 Tongbaite Cr3C2 P nma 2/m 2/m 2/m

I/A.09-35 Isovite (Cr,Fe)23C6 F m3m 4/m 3 2/m

I/A.09-40 Haxonite (Fe,Ni)23C6 F m3m 4/m 3 2/m

I/A.09-50 Cohenite (Fe,Ni,Co)3C Pbnm 2/m 2/m 2/m

I/A.09-55 Niobocarbide! (Nb,Ta)C F m3m 4/m 3 2/m

I/A.09-60 Tantalcarbide! TaC F m3m 4/m 3 2/m

Other Isovite Information

References:

NAME( MinRec, V 31, No. 2) PHYS. PROP.(MinRec, V 31, No. 2) OPTIC PROP.(AmMin, v 84, p 1686)

See Also:

Links to other databases for Isovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Isovite

(Cr,Fe)23C6
Dana No: 1.1.16.3 Strunz No: I/A.09-35
Locality:

Notes: