Sources/Uses
Mineral composed of iron, nickel, and sulfur [(Fe,Ni)9 S8]; [Merck Index] "Pentlandite is an iron-nickel sulfide, (Fe,Ni)9S8. Pentlandite has a narrow variation range in Ni:Fe but it is usually described as having a Ni:Fe of 1:1. It also contains minor cobalt, usually at low wt% levels." [Wikipedia]