data_global _chemical_name_mineral 'Minium' loop_ _publ_author_name 'Gavarri J R' 'Weigel D' 'Hewat A W' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 23 _journal_year 1978 _journal_page_first 327 _journal_page_last 339 _publ_section_title ; Oxydes de plomb. IV. Evolution structurale de l'oxyde Pb3O4 entre 240 et 5 K et mecanisme de la transition Sample: T = 240 K ; _database_code_amcsd 0013354 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Pb3 O4' _cell_length_a 8.8189 _cell_length_b 8.8068 _cell_length_c 6.5636 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 509.770 _exptl_crystal_density_diffrn 8.933 _symmetry_space_group_name_H-M 'P b a m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' 'x,y,-z' '-x,-y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Pb4+ 0.00000 0.50000 0.24710 Pb2+1 0.14110 0.16100 0.00000 Pb2+2 0.16350 0.85560 0.50000 O1 0.67300 0.17110 0.23900 O2C 0.09230 0.63730 0.00000 O2A 0.13330 0.59700 0.50000 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Pb4+ 0.01596 0.01393 0.00747 0.00000 0.00000 0.00000 Pb2+1 0.01596 0.01393 0.00747 0.00000 0.00000 0.00000 Pb2+2 0.01596 0.01393 0.00747 0.00000 0.00000 0.00000 O1 0.01596 0.01393 0.00747 0.00000 0.00000 0.00000 O2C 0.01596 0.01393 0.00747 0.00000 0.00000 0.00000 O2A 0.01596 0.01393 0.00747 0.00000 0.00000 0.00000