Ferchromide Mineral Data

Ferchromide Mineral Data +

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General Ferchromide Information

Chemical Formula:

Cr3Fe1-x(x=0,6)

Composition:

Molecular Weight = 178.33 gm

Chromium 87.47 % Cr

Iron 12.53 % Fe

______

100.00 %

Empirical Formula:

Cr₃Fe⁰⁺_0.4

Environment:

In quartz veins within brecciated amphibolites and schist.

IMA Status:

Approved IMA 1986

Locality:

Efim Area, Kumak ore field, Orenburgskaya Oblast', Urals Region, Russia. Link to MinDat.org Location Data.

Name Origin:

For the chemical composition, FERrum, iron, and CHROMium.

Ferchromide Image

Images:

Ferchromide

Comments: Metallic microcrystal of ferchromide.
Location: Verkhneivinsk, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferchromide Crystallography

Cell Dimensions:

a = 2.882, Z = 1; V = 23.94 Den(Calc)= 12.37

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): 2.04(1), 1.17(0.9), 0.77(0.8),

Physical Properties of Ferchromide

Cleavage:

None

Color:

Gray white.

Diaphaniety:

Opaque

Hardness:

6.5 - Pyrite

Luster:

Metallic

Optical Properties of Ferchromide

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Ferchromide in Air**
λ	R	∑ R(λ)
440 nm	55.20
460 nm	55.40
480 nm	56.20
500 nm	56.90
520 nm	58.00
540 nm	58.80
560 nm	59.50
580 nm	60.40
600 nm	61.00
620 nm	61.00
640 nm	61.80
680 nm	62.80
700 nm	63.20

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

Calculated Properties of Ferchromide

Electron Density:

r_electron=11.4 gm/cc
note: r_Ferchromide=12.4 gm/cc.

Fermion Index

Fermion Index = 0.08575
Boson Index = 0.91425

Photoelectric:

PE_Ferchromide= 24.25 barns/electron
U=PE_Ferchromide x r_electron= 277.17 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferchromide is Not Radioactive

Ferchromide Classification

Dana Class:

1.1.12.3 (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.06-20 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 Ferchromide Information

References:

PHYS. PROP.(Am.Min.,Vol.73,p191,1988) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Ferchromide :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Ferchromide Specimen Label here :

Ferchromide

Cr3Fe1-x(x=0,6)
Dana No: 1.1.12.3 Strunz No: I/A.06-20
Locality:

Notes: