1) Hexagonal mineral 2) Iron mineral
Found on
https://www.crosswordclues.com/clue/xifengite
Xifengite (Fe5Si3) is a rare metallic iron silicide mineral. The crystal system of xifengite is hexagonal. It has a specific gravity of 6.45 and a Mohs hardness of 5.5. It occurs as steel gray inclusions within other meteorite derived nickel iron mineral phases. It was first described in 1984 and named for the eastern passageway, Xifengkou, of the...
Found on
http://en.wikipedia.org/wiki/Xifengite
No exact match found.
