Hexaferrum (original) (raw)
A valid IMA mineral species
About HexaferrumHide
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Colour:
steel-gray with yellow tint
Specific Gravity:
10.69 (Calculated)
Name:
Named for the crystal morphology, being in the HEXAgonal system, and its composition, containing essential iron (Latin = FERRUM).
The Fe analogue of garutiite, hexamolybdenum, osmium, and ruthenium. Said to represent a continuous solid solution, and Ir-, Os- and Ru-rich varieties are desribed.
It was defined by Mochalov et al. (1998) as a hexagonal close-packed (hcp) Fe mineral containing amounts of Ru, Os, or Ir. Cabri & Aiglsperger (2018) has re-examined hexaferrum together with a review of the phase chemistry in the Fe-Ni-Ir and Fe-Ru-Ir systems. They conclude that "the hcp (Fe,Ir) mineral correponds to the ε-phase of Raub _et a_l. (1964) and should be differentiated from hexaferrum [(Fe,Os) and (Fe,Ru)] because it is separated by one to two miscibility gaps and therefore is not a continuous solid solution with Fe".
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:6992:8
9d30113c-b89f-4ef5-b782-0b8a2e0328c5
IMA Classification of HexaferrumHide
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Classification of HexaferrumHide
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1.AG.05
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Hfe | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of HexaferrumHide
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Colour:
steel-gray with yellow tint
Hardness:
VHN100=629 - 679 - Vickers
Comment:
the above is VHN50 for Ru-variety; Os-variety: 741-880
Density:
10.69 g/cm3 (Calculated)
Optical Data of HexaferrumHide
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Anisotropism:
strong, blue-gray to muddy-brown yellow polarization colors (Ru variety); weak (Os & Ir variety)
Bireflectance:
not observed in Os- and Ir-rich variety
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 480nm | 49.8% | 41.9% |
| 560nm | 51.1% | 42.0% |
| 580nm | 51.4% | 42.0% |
| 660nm | 53.4% | 43.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 53.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
light gray to white (Ru variety); white (Os variety); white to light gray (Ir variety)
Comments:
Reflectance for the Os-rich variety: 55.1 (480nm), 53.4 (560nm), 53.2 (580nm), 54.7 (660nm)
Chemistry of HexaferrumHide
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Mindat Formula:
(Fe,Os,Ru,Ir)
Crystallography of HexaferrumHide
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Class (H-M):
6/m m m _(_6/_m_2/_m_2/m ) - Dihexagonal Dipyramidal
Cell Parameters:
a = 2.64(1) Å, c = 4.20(2) Å
Unit Cell V:
25.35 ų (Calculated from Unit Cell)
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020235 | Hexaferrum | Mochalov A G, Dmitrenko G G, Rudashevsky N S, Zhernovsky I V, Boldyreva M M (1998) Hexaferrum (Fe,Ru),(Fe,Os),(Fe,Ir) - a new mineral Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 127 41-51 | 1998 | Chirynaisky Massif, Koryak Mts, Far-Eastern Region, Russia | 0 | 293 | |
| 0020236 | Hexaferrum | Mochalov A G, Dmitrenko G G, Rudashevsky N S, Zhernovsky I V, Boldyreva M M (1998) Hexaferrum (Fe,Ru),(Fe,Os),(Fe,Ir) - a new mineral Zapiski Vserossijskogo Mineralogicheskogo Obshchestva 127 41-51 | 1998 | Chirynaisky Massif, Koryak Mts, Far-Eastern Region, Russia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.28/2.246/2.254 Å | (50) |
| 2.10/2.087/2.103 Å | (60/60/70) |
| 2.006/1.976/1.993 Å | (100) |
| 1.549/-/1.542 Å | (30/-/40) |
| -/1.528/- Å | (40) |
| 1.316/1.297/1.304 Å | (30/60/50) |
| 1.195/1.180/1.192 Å | (30/60/40) |
| -/1.100/1.110 Å | (-/50/40) |
| -/1.083 Å | (30) |
Comments:
Ru/Os/Ir varieties; b - broad
Geological EnvironmentHide
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Type Occurrence of HexaferrumHide
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General Appearance of Type Material:
Cubic or octahedral crystals, up to 200 µm (usually 5–50 µm), as inclusions in Cr spinel
Place of Conservation of Type Material:
Mining Museum of Saint Petersburg Mining Institute, Russia
Geological Setting of Type Material:
dunite-harzburgite massif
Associated Minerals at Type Locality:
Synonyms of HexaferrumHide
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Other Language Names for HexaferrumHide
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Varieties of HexaferrumHide
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Related Minerals - Strunz-mindat GroupingHide
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| 1.AG. | Michitoshiite-(Cu) | Rh(Cu1-xGex) | Iso. m_3_m _(_4/_m_32/m ) : P m_3_m |
|---|---|---|---|
| 1.AG. | Palladothallite | Pd3Tl | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_4/m m m |
| 1.AG. | Sluzhenikinite | Pd15(Sb7-xSnx) | Mon. 2/m : _P_21/m |
| 1.AG. | Driekopite | PtBi | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 1.AG. | Sidorovite | Fe3Pt | Iso. m_3_m _(_4/_m_32/m ) : P m_3_m |
| 1.AG.05 | Garutiite | (Ni,Fe,Ir) | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 1.AG.10 | Atokite | (Pd,Pt)3Sn | Iso. m_3_m _(_4/_m_32/m ) : F m_3_m |
| 1.AG.10 | Rustenburgite | (Pt,Pd)3Sn | Iso. m_3_m _(_4/_m_32/m ) : F m_3_m |
| 1.AG.10 | Zvyagintsevite | Pd3Pb | Iso. m_3_m _(_4/_m_32/m ) : P m_3_n |
| 1.AG.15 | Taimyrite | (Pd,Cu,Pt)3Sn | Orth. |
| 1.AG.15 | Tatyanaite | (Pt,Pd,Cu)9Cu3Sn4 | Orth. |
| 1.AG.20 | Paolovite | Pd2Sn | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 1.AG.25 | Plumbopalladinite | Pd3Pb2 | Hex. 6_m_ m : P_63_m c |
| 1.AG.25 | Stannopalladinite | (Pd,Cu)3Sn | Orth. |
| 1.AG.30 | Cabriite | Pd2CuSn | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m m |
| 1.AG.35 | Chengdeite | Ir3Fe | Iso. m_3_m _(_4/_m_32/m ) |
| 1.AG.35 | Isoferroplatinum | Pt3Fe | Iso. m_3_m _(_4/_m_32/m ) |
| 1.AG.40 | Ferronickelplatinum | Pt2FeNi | Tet. |
| 1.AG.40 | Tetraferroplatinum | PtFe | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/m m m |
| 1.AG.40 | Tulameenite | Pt2CuFe | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/m m m |
| 1.AG.45 | Hongshiite | PtCu | Trig. |
| 1.AG.45 | Skaergaardite | PdCu | Iso. m_3_m _(_4/_m_32/m ) : P m_3_m |
| 1.AG.50 | Yixunite | Pt3In | Iso. m_3_m _(_4/_m_32/m ) |
| 1.AG.55 | Damiaoite | PtIn2 | Iso. m_3_m _(_4/_m_32/m ) : F m_3_m |
| 1.AG.60 | Niggliite | PtSn | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m m c |
| 1.AG.65 | Bortnikovite | Pd4Cu3Zn | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/m m m |
| 1.AG.70 | Nielsenite | PdCu3 | Tet. 4_m_ m : P_4_m m |
| 1.AG.75 | Norilskite | (Pd,Ag)2xPb (x = 0.08 - 0.11) | Trig. 32 : _P_3121 |
Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for HexaferrumHide
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References for HexaferrumHide
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Reference List:
Localities for HexaferrumHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.