
1) Carbide mineral 2) Cubic mineral 3) Nickel mineral
Found on
https://www.crosswordclues.com/clue/haxonite

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 5½ - 6. It was first described in 1971, and named after Howard J. Axon (1924–1992), metallurgist at the University of Manchester, Mancheste...
Found on
http://en.wikipedia.org/wiki/Haxonite
No exact match found.