Haxonite is an iron nickel carbide mineral found in iron meteorites and carbonaceous chondrites. It has a chemical formula of (Fe,Ni)₂₃C₆, crystallises in the cubic crystal system and has a Mohs hardness of 5+1⁄2 - 6.^[2][3]

Haxonite
General
Category	Native element minerals
Formula (repeating unit)	(Fe,Ni)23C6
IMA symbol	Hax[1]
Strunz classification	1.BA.10
Crystal system	Isometric Unknown space group
Identification
Mohs scale hardness	5+1⁄2 - 6

It was first described in 1971, and named after Howard J. Axon (1924–1992), metallurgist at the University of Manchester, Manchester, England. Co-type localities are the Toluca meteorite, Xiquipilco, Mexico and the Canyon Diablo meteorite, Meteor Crater, Coconino County, Arizona, US.^[2]

It occurs associated with kamacite, taenite, schreibersite, cohenite, pentlandite and magnetite.^[3]