data_global _amcsd_formula_title 'Cu4 O9 P2' loop_ _publ_author_name 'Brunel-Lauegt M' 'Durif A' 'Guitel J' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 25 _journal_year 1978 _journal_page_first 39 _journal_page_last 47 _publ_section_title ; Structure cristalline de Cu4 (P O4)2 O _cod_database_code 1007023 ; _database_code_amcsd 0013362 _chemical_formula_sum 'Cu4 P2 O9' _cell_length_a 7.528 _cell_length_b 8.090 _cell_length_c 6.272 _cell_angle_alpha 113.68 _cell_angle_beta 81.56 _cell_angle_gamma 105.77 _cell_volume 336.340 _exptl_crystal_density_diffrn 4.543 _symmetry_space_group_name_H-M 'P -1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Cu1 0.12770 0.26310 0.35560 Cu2 0.66830 0.43840 0.78390 Cu3 0.89400 0.74350 0.12820 Cu4 0.61850 0.91400 0.06530 P1 0.73600 0.34940 0.22040 P2 0.21550 0.91950 0.41930 O1 0.27400 0.29490 0.09510 O2 0.03190 0.76060 0.37860 O3 0.58470 0.16810 0.15390 O4 0.78000 0.96610 0.31680 O5 0.20460 0.03480 0.28550 O6 0.37710 0.82680 0.33070 O7 0.70190 0.47350 0.10510 O8 0.92820 0.30920 0.15380 O9 0.27400 0.53730 0.51450