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Hexaferrum Mineral Data
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General Hexaferrum Information
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 Chemical Formula: |
(Fe,Os,Ru,Ir) |
| Composition: |
Molecular Weight = 86.51 gm |
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Iron 41.96 % Fe |
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Iridium 31.11 % Ir |
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Osmium 17.59 % Os |
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Ruthenium 9.35 % Ru |
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______ |
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100.00 % |
| Empirical Formula: |
Fe0+0.65Ir0.14Os0.08Ru0.08 |
| Environment: |
Found in chromite segregations in dunite. |
| IMA Status: |
Approved IMA 1995 (Dana # Added) |
| Locality: |
The Chirynaisky massif, Koryak Mountains, Kamchatka, Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the symmetry and composition. |
| Synonym: |
IMA1995-032 |
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Hexaferrum Image |
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Images:
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Hexaferrum
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 |
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Hexaferrum Crystallography
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| Axial Ratios: |
a:c = 1:1.60864 |
| Cell Dimensions: |
a = 2.591, c = 4.168, Z = 2; V = 24.23 Den(Calc)= 11.86 |
| Crystal System: |
Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc |
| X Ray Diffraction: |
By Intensity(I/Io): 1.976(1), 1.297(0.6), 2.087(0.6), |
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Physical Properties of Hexaferrum
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| Cleavage: |
None |
| Color: |
Yellowish steel gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Habit: |
Pseudo Cubic - Crystals show a cubic outline. |
| Hardness: |
6-7 - Orthoclase-Quartz |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Hexaferrum
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| RL Anisotrophism: |
Weak. |
| RL Bireflectance: |
None. |
| RL Color: |
White. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Hexaferrum in Air
| λ |
R |
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∑ R(λ) |
| 480 nm |
55.10 |
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| 560 nm |
53.40 |
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| 580 nm |
53.20 |
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| 660 nm |
54.70 |
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Calculated Relative Intensity Colors of Hexaferrum in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
170% |
| R |
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Calculated Properties of Hexaferrum
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| Electron Density: |
Bulk Density (Electron Density)=10.2 gm/cc
note: Specific Gravity of Hexaferrum =11.9 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEHexaferrum = 721.29 barns/electron
U=PEHexaferrum x rElectron Density=7,372.56 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hexaferrum is Not Radioactive |
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Hexaferrum Classification
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| Dana Class: |
01.02.02.04 (01)Native Elements |
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(01.02)with platinum group metals and alloys |
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(01.02.02)Osmium group (Space Group P63/mmc) |
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01.02.02.01 Osmium (Os,Ir) P 63/mmc 6/m 2/m 2/m |
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01.02.02.02 Ruthenium (Ru,Ir,Os) P 63/mmc 6/m 2/m 2/m |
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01.02.02.03 Rutheniridosmine (Ir,Os,Ru) P 63/mmc 6/m 2/m 2/m |
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01.02.02.04 Hexaferrum! (Fe,Os,Ru,Ir) P 63/mmc 6/m 2/m 2/m |
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01.02.02.05 Hexamolybdenum! (Mo,Ru,Fe,Ir,Os) P 63/mmc 6/m 2/m 2/m |
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01.02.02.06 IMA2008-055! (Ni,Fe,Ir) P 63/mmc 6/m 2/m 2/m |
| Strunz Class: |
01.AG.05 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides) |
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01.A - Metals and Intermetallic Alloys |
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01.AG -PGE-metal alloys |
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01.AG.05 Hexaferrum! (Fe,Os,Ru,Ir) P 63/mmc 6/m 2/m 2/m |
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01.AG.05 IMA2008-055! (Ni,Fe,Ir) P 63/mmc 6/m 2/m 2/m |
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Other Hexaferrum Information
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| 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 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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Hexaferrum
(Fe,Os,Ru,Ir)
Dana No: 01.02.02.04 Strunz No: 01.AG.05
Locality:
Notes:
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