Chromferide Mineral Data

Chromferide Mineral Data

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General Chromferide Information

Chemical Formula:

Fe3Cr1-x (x=0,6)

Composition:

Molecular Weight = 188.34 gm

Chromium 11.04 % Cr

Iron 88.96 % Fe

______

100.00 %

Empirical Formula:

Fe⁰⁺₃Cr_0.4

Environment:

In quartz veins within brecciated amphibolites and shists.

IMA Status:

Approved IMA 1986

Locality:

Southern Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the chemical composition, CHROMium and FERrum.

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Chromferide Crystallography

Cell Dimensions:

a = 2.859, Z = 0.5; V = 23.37 Den(Calc)= 6.69

Crystal System:

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

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

By Intensity(I/I_o): 1.16(1), 2.02(1), 1.43(0.8),

Physical Properties of Chromferide

Cleavage:

None

Color:

Gray white.

Diaphaniety:

Opaque

Hardness:

4 - Fluorite

Luster:

Metallic

Magnetism:

Ferromagnetic

Optical Properties of Chromferide

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Chromferide in Air**
λ	R	∑ R(λ)
440 nm	50.40
460 nm	50.90
480 nm	51.40
500 nm	52.60
520 nm	53.00
540 nm	55.30
560 nm	56.50
580 nm	56.90
600 nm	57.90
620 nm	58.30
640 nm	59.00
660 nm	60.00
680 nm	60.70
700 nm	60.80

**Calculated Relative Intensity Colors of Chromferide in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%
R

Calculated Properties of Chromferide

Electron Density:

r_electron=6.22 gm/cc
note: r_Chromferide=6.69 gm/cc.

Fermion Index

Fermion Index = 0.02934
Boson Index = 0.97066

Photoelectric:

PE_Chromferide= 30.18 barns/electron
U=PE_Chromferide x r_electron= 187.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chromferide is Not Radioactive

Chromferide Classification

Dana Class:

1.1.12.2 (1)Native Elements

(1.1)with metallic elements other than the platinum group

(1.1.12)Dana Group

1.1.12.1 Chromium Cr I m3m 4/m 3 2/m

1.1.12.2 Chromferide Fe3Cr1-x(x=0,6) P m3m 4/m 3 2/m

1.1.12.3 Ferchromide Cr3Fe1-x(x=0,6) P m3m 4/m 3 2/m

Strunz Class:

I/A.06-30 I - Elements

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

I/A.06 - Chromium series, Titanium-Chromferides

I/A.06-05 Titanium* Ti P 6₃/mmc 6/m 2/m 2/m

I/A.06-10 Chromium Cr I m3m 4/m 3 2/m

I/A.06-20 Ferchromide Cr3Fe1-x(x=0,6) P m3m 4/m 3 2/m

I/A.06-30 Chromferide Fe3Cr1-x(x=0,6) P m3m 4/m 3 2/m

Other Chromferide Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Am.Min.,Vol.73,p190,1988) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Chromferide :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Chromferide

Fe3Cr1-x (x=0,6)
Dana No: 1.1.12.2 Strunz No: I/A.06-30
Locality:

Notes: