Mineralogy Database

Ferchromide Mineral Data

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General Ferchromide Information

Help on Chemical  Formula: Chemical Formula: Cr3Fe1-x(x=0,6)
Help on Composition: Composition: Molecular Weight = 178.33 gm
   Chromium  87.47 %  Cr
   Iron      12.53 %  Fe
            100.00 % 
Help on Empirical Formula: Empirical Formula: Cr3Fe0+0.4
Help on Environment: Environment: In quartz veins within brecciated amphibolites and schist.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Efim Area, Kumak ore field, Orenburgskaya Oblast', Urals Region, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the chemical composition, FERrum, iron, and CHROMium.
Help on Name Pronunciation: Name Pronunciation: Ferchromide + Pronunciation Say FERCHROMIDE

Ferchromide Image

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

Ferchromide Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 2.882, Z = 1; V = 23.94 Den(Calc)= 12.37
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.04(1), 1.17(0.9), 0.77(0.8),

Physical Properties of Ferchromide

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray white.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luster: Luster: Metallic

Optical Properties of Ferchromide

Help on Reflectivity 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
   0%   20%   40%   60%   80% 100% 120% 140% 160%

Calculated Properties of Ferchromide

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=11.4 gm/cc
note: Specific Gravity of Ferchromide =12.4 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEFerchromide = 24.25 barns/electron
U=PEFerchromide x rElectron Density= 277.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferchromide is Not Radioactive

Ferchromide Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.01)with metallic elements other than the platinum group
  (01.01.12)Dana Group Chromium Cr I m3m 4/m 3 2/m Chromferide Fe3Cr1-x(x=0,6) P m3m 4/m 3 2/m Ferchromide Cr3Fe1-x(x=0,6) P m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 01.AE.15 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.A - Metals and Intermetallic Alloys
  01.AE -Iron-chromium family
01.AE.15 Chromferide Fe3Cr1-x(x=0,6) P m3m 4/m 3 2/m
01.AE.15 Ferchromide Cr3Fe1-x(x=0,6) P m3m 4/m 3 2/m
01.AE.15 Wairauite CoFe P m3m 4/m 3 2/m

Other Ferchromide Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.73,p191,1988) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Ferchromide :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 01.AE.15





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