data_global _amcsd_formula_title 'Ba Cu O5 Yb2' loop_ _publ_author_name 'Salinas-Sanchez A' 'Garcia-Munoz J' 'Rodriguez-Carvajal J' 'Saez-Puche R' 'Martinez J' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 100 _journal_year 1992 _journal_page_first 201 _journal_page_last 211 _publ_section_title ; Structural characterization of R2BaCuO5 (R=Y,Lu,Yb,Tm,Er,Ho,Dy,Gd,Eu and Sm) oxides by X-ray and neutron diffraction _cod_database_code 1006056 ; _database_code_amcsd 0013747 _chemical_formula_sum 'Ba Yb2 Cu O5' _cell_length_a 12.0652 _cell_length_b 5.6152 _cell_length_c 7.0569 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 478.094 _exptl_crystal_density_diffrn 8.710 _symmetry_space_group_name_H-M 'P n m a' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '1/2-x,1/2+y,1/2+z' '1/2+x,1/2-y,1/2-z' '1/2+x,y,1/2-z' '1/2-x,-y,1/2+z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ba1 0.90480 0.25000 0.92920 Yb1 0.28840 0.25000 0.11760 Yb2 0.07380 0.25000 0.39720 Cu1 0.65940 0.25000 0.71260 O1 0.43290 -0.00650 0.16490 O2 0.22790 0.50250 0.35940 O3 0.10110 0.25000 0.08470