data_global _chemical_name_mineral 'Minium' loop_ _publ_author_name 'Dinnebier R E' 'Carlson S' 'Hanfland M' 'Jansen M' _journal_name_full 'American Mineralogist' _journal_volume 88 _journal_year 2003 _journal_page_first 996 _journal_page_last 1002 _publ_section_title ; Bulk modulus and high-pressure crystal structures of minium, Pb3O4, determined by X-ray powder diffraction Sample: Phase III of Pb3O4 at 13.3 GPa ; _database_code_amcsd 0003132 _chemical_formula_sum 'Pb3 O4' _cell_length_a 9.3812 _cell_length_b 6.4610 _cell_length_c 3.3168 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 201.038 _exptl_crystal_density_diffrn 11.326 _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 _atom_site_U_iso_or_equiv Pb1 0.67564 0.94970 0.50000 0.01400 Pb2 0.50000 0.50000 0.00000 0.01700 O1 0.31320 0.30140 0.00000 0.04200 O2 0.58410 0.31080 0.50000 0.04200