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 1000293 _database_code_amcsd 0014351 5.4577 5.4577 13.1058 90 90 120 R-3c atom x y z Pr1 0 0 .25 Ni1 0 0 0 O1 .4446 0 .25