data_global _amcsd_formula_title 'Al2 Ge2 O7' loop_ _publ_author_name 'Agafonov V' 'Kahn A' 'Michel D' 'Perez y Jorba M' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 62 _journal_year 1986 _journal_page_first 402 _journal_page_last 404 _publ_section_title ; Crystal structure of a new digermanate: Al2 Ge2 O7 _cod_database_code 1001676 ; _database_code_amcsd 0013582 _chemical_formula_sum 'Ge2 Al2 O7' _cell_length_a 7.132 _cell_length_b 7.741 _cell_length_c 9.702 _cell_angle_alpha 90 _cell_angle_beta 110.62 _cell_angle_gamma 90 _cell_volume 501.321 _exptl_crystal_density_diffrn 4.123 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ge1 0.24140 0.24880 0.29450 Al1 0.32900 0.07640 0.02110 O1 0.00000 0.16940 0.25000 O2 0.28910 0.43100 0.39820 O3 0.39720 0.08340 0.39730 O4 0.28870 0.27390 0.12920