Ni O3 Pr Huang T, Parrish W, Toraya H, Lacorre P, Torrance J Materials Research Bulletin 25 (1990) 1091-1098 High temperature crystal structures of orthorhombic and rhombohedral PrNiO3 _cod_database_code 1000294 _database_code_amcsd 0014352 5.4614 5.4614 13.1319 90 90 120 R-3c atom x y z Pr1 0 0 .25 Ni1 0 0 0 O1 .4442 0 .25