Mineralogy Database

Hexaferrum Mineral Data

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General Hexaferrum Information

Help on Chemical  Formula: Chemical Formula: (Fe,Os,Ru,Ir)
Help on Composition: Composition: Molecular Weight = 86.51 gm
   Iron       41.96 %  Fe
   Iridium    31.11 %  Ir
   Osmium     17.59 %  Os
   Ruthenium   9.35 %  Ru
             100.00 % 
Help on Empirical Formula: Empirical Formula: Fe0+0.65Ir0.14Os0.08Ru0.08
Help on Environment: Environment: Found in chromite segregations in dunite.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: The Chirynaisky massif, Koryak Mountains, Kamchatka, Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the symmetry and composition.
Help on Synonym: Synonym: IMA1995-032

Hexaferrum Image

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Comments: Polished section showing a white euhedral crystal of hexaferrum in gray chromite.
Location: Pole Corral Pass, Rattlesnake Creek Terrane, Beegum, California, USA. Scale: Picture size 14 mm.
© Thomas Witzke

Hexaferrum Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.60864
Help on Cell Dimensions: Cell Dimensions: a = 2.591, c = 4.168, Z = 2; V = 24.23 Den(Calc)= 11.86
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.976(1), 1.297(0.6), 2.087(0.6),

Physical Properties of Hexaferrum

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellowish steel gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Pseudo Cubic - Crystals show a cubic outline.
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Hexaferrum

Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Bireflectance: RL Bireflectance: None.
Help on RL Color: RL Color: White.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Hexaferrum in Air
λ R  ∑ R(λ) 
 480 nm   55.10   
 560 nm   53.40 
 580 nm   53.20 
 660 nm   54.70 
Calculated Relative Intensity Colors of Hexaferrum in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160% 170%

Calculated Properties of Hexaferrum

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=10.2 gm/cc
note: Specific Gravity of Hexaferrum =11.9 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEHexaferrum = 721.29 barns/electron
U=PEHexaferrum x rElectron Density=7,372.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hexaferrum is Not Radioactive

Hexaferrum Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.02)with platinum group metals and alloys
  (01.02.02)Osmium group (Space Group P63/mmc) Osmium (Os,Ir) P 63/mmc 6/m 2/m 2/m Ruthenium (Ru,Ir,Os) P 63/mmc 6/m 2/m 2/m Rutheniridosmine (Ir,Os,Ru) P 63/mmc 6/m 2/m 2/m Hexaferrum! (Fe,Os,Ru,Ir) P 63/mmc 6/m 2/m 2/m Hexamolybdenum! (Mo,Ru,Fe,Ir,Os) P 63/mmc 6/m 2/m 2/m IMA2008-055! (Ni,Fe,Ir) P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 01.AG.05 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.A - Metals and Intermetallic Alloys
  01.AG -PGE-metal alloys
01.AG.05 Hexaferrum! (Fe,Os,Ru,Ir) P 63/mmc 6/m 2/m 2/m
01.AG.05 IMA2008-055! (Ni,Fe,Ir) P 63/mmc 6/m 2/m 2/m

Other Hexaferrum Information

Help on References: References: NAME( MinRec, V. 31, No. 2) PHYS. PROP.(MinRec, V 31, No. 2) OPTIC PROP.(AmMin,v 84, p 1686)
Help on See Also: See Also: Links to other databases for Hexaferrum :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 01.AG.05





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