data_1000302 _chemical_name_systematic 'Praseodymium nickel(III) oxide' _chemical_formula_structural 'Pr Ni O3' _chemical_formula_sum 'Ni O3 Pr' _publ_section_title ; Synthesis, crystal structure and properties of metallic PrNiO~3~: comparison with metallic NdNiO~3~ and semiconducting SmNiO~3~ ; loop_ _publ_author_name 'Lacorre, P' 'Torrance, J B' 'Pannetier, J' 'Nazzal, A I' 'Wang, P W' 'Huang, T C' _journal_name_full 'Journal of Solid State Chemistry' _journal_coden_ASTM JSSCBI _journal_volume 91 _journal_year 1991 _journal_page_first 225 _journal_page_last 237 _cell_length_a 5.4154(1) _cell_length_b 5.3755(1) _cell_length_c 7.6192(2) _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 221.8 _cell_formula_units_Z 4 _symmetry_space_group_name_H-M 'P b n m' _symmetry_Int_Tables_number 62 _symmetry_cell_setting orthorhombic loop_ _symmetry_equiv_pos_as_xyz 'x,y,z' '1/2-x,1/2+y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,-z' '-x,-y,-z' '1/2+x,1/2-y,1/2+z' 'x,y,1/2-z' '1/2-x,1/2+y,z' loop_ _atom_type_symbol _atom_type_oxidation_number Pr3+ 3.000 Ni3+ 3.000 O2- -2.000 loop_ _atom_site_label _atom_site_type_symbol _atom_site_symmetry_multiplicity _atom_site_Wyckoff_symbol _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_attached_hydrogens _atom_site_calc_flag Pr1 Pr3+ 4 c 0.9959(3) 0.0293(2) 0.25 1. 0 d Ni1 Ni3+ 4 b 0.5 0. 0. 1. 0 d O1 O2- 4 c 0.0739(24) 0.4948(17) 0.25 1. 0 d O2 O2- 8 d 0.7251(20) 0.2829(19) 0.0337(13) 1. 0 d _refine_ls_R_factor_all 0.033