Example – Cobaltite, CoAsS
From the German, Kobold, “underground spirit” or “goblin,” in allusion to the refusal of cobaltiferous ores to smelt properly, hence “bewitched.”
The crystal structures of ordered and disordered cobaltite, ordered, annealed after heating in a vacuum at 450 C°
Giese R.F. , Kerr P.F.
American Mineralogist , 50 (1965) p.1002-1014,