The mineral cobaltite can have this symmetry form. Lanthanum cobaltite is a perovskite with chemical formula LaCoO. Associated minerals include&colon; arsenopyrite, barite, silver, cobaltite, pyrrhotite, pentlandite, chalcopyrite, breithauptite and maucherite. It is a member of the cobaltite group and forms a series with willyamite ((Co,Ni)SbS). Cobaltite is a sulfide mineral composed of cobalt, arsenic, and sulfur, CoAsS.