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Haxonite
A valid IMA mineral species
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Howard J. Axon
Formula:
NiFe22C6
Recent chemical and single-crystal X-ray diffraction data (https://doi.org/10.2138/am-2025-10067) show that Ni occupies a single crystallographic site, resulting in the ideal formula NiFe22C6.
Colour:
White
Hardness:
5½ - 6
Specific Gravity:
7.70 (Calculated)
Crystal System:
Isometric
Name:
Named in honor of Howard James Axon (7 October 1924, Retford Nottinghamshire, UK - 21 March 1992), metallurgist and expert on meteorite mineralogy at the University of Manchester, Manchester, England.
The mineral was not named in the original description in 1971, but appears in an abstract in 1972.
The mineral was not named in the original description in 1971, but appears in an abstract in 1972.
This page provides mineralogical data about Haxonite.
Unique Identifiers
Mindat ID:
1836
Long-form identifier:
mindat:1:1:1836:0
Similar Names
| Saxonite | A rock subtype |
IMA Classification of Haxonite
Approved
Approval year:
1971
First published:
1971
Type description reference:
Classification of Haxonite
1.BA.10
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
A : Carbides
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
A : Carbides
Dana 7th ed.:
1.1.25.1
1.1.16.2
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
2.10
2 : Carbides, Nitrides, Silicides and Phosphides
2 : Carbides, Nitrides, Silicides and Phosphides
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Hax | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Haxonite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Haxonite
Transparency:
Opaque
Colour:
White
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN100=850(50) - Vickers
Density:
7.70 g/cm3 (Calculated)
Optical Data of Haxonite
Chemistry of Haxonite
Mindat Formula:
NiFe22C6
Recent chemical and single-crystal X-ray diffraction data (https://doi.org/10.2138/am-2025-10067) show that Ni occupies a single crystallographic site, resulting in the ideal formula NiFe22C6.
Recent chemical and single-crystal X-ray diffraction data (https://doi.org/10.2138/am-2025-10067) show that Ni occupies a single crystallographic site, resulting in the ideal formula NiFe22C6.
Elements listed:
Crystallography of Haxonite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
Fm3m
Cell Parameters:
a = 10.55 Å
Unit Cell V:
1,174.24 ų (Calculated from Unit Cell)
Comment:
by analogy to isovite?
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.356 Å | (strong) |
| 2.151 Å | (strong) |
| 1.863 Å | (moderate) |
| 1.242 Å | (moderate) |
| 1.755 Å | (moderately weak) |
| 1.218 Å | (moderately weak) |
| 1.060 Å | (moderately weak) |
Comments:
Toluca meteorite.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 1: Primary nebular phases | 4.567-4.561 |
| 4 : Primary chondrule phases | 4.566–4.561 |
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 5 : Primary asteroid phases | 4.566–4.560 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 7 : Ultramafic igneous rocks |
Geological Setting:
Characteristic of group I and group IIIC-IIID iron meteorites
Type Occurrence of Haxonite
Co-Type Localities:
General Appearance of Type Material:
intricate intergrowths with taenite, schreibersite, and kamacite
Geological Setting of Type Material:
iron meteorite
Synonyms of Haxonite
Other Language Names for Haxonite
Common Associates
Associations Based on Photo Data:
| 1 photo of Haxonite associated with Schreibersite | (Fe,Ni)3P |
| 1 photo of Haxonite associated with Taenite | (Fe,Ni) |
| 1 photo of Haxonite associated with 'Kamacite' | (Fe,Ni) |
Related Minerals - Strunz-mindat Grouping
| 1.BA.05 | Cohenite | Fe3C |
| 1.BA.10 | Isovite | (Cr,Fe)23C6 |
| 1.BA.15 | Tongbaite | Cr3C2 |
| 1.BA.20 | Niobocarbide | (Nb,Ta)C |
| 1.BA.20 | Khamrabaevite | (Ti,V,Fe)C |
| 1.BA.20 | Tantalcarbide | TaC |
| 1.BA.25 | Qusongite | WC |
| 1.BA.25 | Zoyashlyukovaite | MoC |
| 1.BA.30 | Yarlongite | Cr4Fe4NiC4 |
| 1.BA.35 | Edscottite | Fe5C2 |
Other Information
Notes:
Strongly magnetic
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 Haxonite
mindat.org URL:
https://www.mindat.org/min-1836.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Haxonite
Reference List:
Vereshchagin, Oleg S.; Gorelova, Liudmila A.; Shilovskikh, Vladimir V.; Vlasenko, Natalia S.; Pagano, Renato; Britvin, Sergey N. (2026) Haxonite revisited, NiFe22C6: new crystal-chemical formulae and Fe-Ni ordering as a structure-stabilizing factor. American Mineralogist, 111 (8). p.1308-1314. doi:10.2138/am-2025-10067
Localities for Haxonite
Showing 28 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Algeria | |
| Buchwald (1975) |
Antarctica | |
| Scott et al. (1981) +1 other reference |
Argentina | |
| Buchwald (1975) |
Australia | |
| Buchwald (1975) |
Belarus | |
| Bakhtin et al. (2017) |
Brazil | |
| Scott (1977) |
| Kaminski et al. (2017) |
China | |
| Yongheng Chen and Daode Wang (1989) |
Hungary | |
| Sándor et al. (2005) |
India | |
| Taylor et al. (1981) |
| Buchwald (1975) |
Indonesia | |
| Taylor et al. (1981) |
Kazakhstan | |
| 2: 322-324 +2 other references |
Mexico (TL) | |
| Am Min 59 (1974) |
Russia | |
| H. J. Axon et al. (1981) |
Turkey | |
| Buchwald (1975) |
USA (TL) | |
| Scott (1971) +2 other references |
| Buchwald (1975) |
| Buchwald (1975) |
| Buchwald (1975) |
| rruff.geo.arizona.edu (n.d.) |
| rruff.geo.arizona.edu (n.d.) +1 other reference |
| Fredriksson et al. (1989) |
| Buchwald (1975) |
| Buchwald (1975) |
| Newton et al. (2000) |
| Buchwald (1975) |
| Buchwald (1975) |
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