oc lin ic ▁p yr r hot ite ▁under go es ▁a ▁magnetic ▁transition ▁known ▁as ▁the ▁Bes n us ▁transition ▁at ▁ 3 0 ▁K ▁that ▁leads ▁to ▁a ▁loss ▁of ▁magnetic ▁rem an ence . ▁The ▁s atur ation ▁magnet ization ▁of ▁p yr r hot ite ▁is ▁ 0 . 1 2 ▁t es la . ▁ ▁Occ urrence ▁P yr r hot ite ▁is ▁a ▁rather ▁common ▁trace ▁constitu ent ▁of ▁ma fic ▁ igne ous ▁rocks ▁especially ▁nor ites . ▁It ▁occurs ▁as ▁seg reg ation ▁depos its ▁in ▁layer ed ▁intr us ions ▁associated ▁with ▁pent land ite , ▁ch al copy rite ▁and ▁other ▁sul f ides . ▁It ▁is ▁an ▁important ▁constitu ent ▁of ▁the ▁Sud bury ▁intr usion ▁where ▁it ▁occurs ▁in ▁masses ▁associated ▁with ▁co pper ▁and ▁nick el ▁min eral isation . ▁It ▁also ▁occurs ▁in ▁p eg mat ites ▁and ▁in ▁contact ▁met am orph ic ▁zones . ▁P yr r hot ite ▁is ▁often ▁accompanied ▁by ▁py rite , ▁mar cas ite ▁and ▁magnet ite . ▁P yr r hot ite ▁does ▁not ▁have ▁specific ▁applications . ▁It ▁is ▁m ined ▁primarily ▁because ▁it ▁is ▁associated ▁with ▁pent land ite , ▁sul f ide ▁min eral ▁that ▁can ▁contain ▁significant ▁amounts ▁of ▁nick el ▁and ▁c ob alt . ▁ ▁Et ym ology ▁and ▁history ▁The ▁name ▁p yr r hot ite ▁is ▁derived ▁from ▁Greek ▁p yr r hos , ▁fl ame - color ed . ▁ ▁Iss ues