data_global _amcsd_formula_title 'SrGa2Ge2O8' loop_ _publ_author_name 'Phillips M W' 'Kroll H' 'Pentinghaus H' 'Ribbe P H' _journal_name_full 'American Mineralogist' _journal_volume 60 _journal_year 1975 _journal_page_first 659 _journal_page_last 666 _publ_section_title ; The structure of synthetic paracelsian analogs, SrGa2Si2O8 and SrGa2Ge2O8 ; _database_code_amcsd 468 _chemical_formula_sum 'Sr Ga2 Ge2 O8' _cell_length_a 9.2056 _cell_length_b 9.6602 _cell_length_c 8.5834 _cell_angle_alpha 90.0 _cell_angle_beta 90.432 _cell_angle_gamma 90.0 _cell_volume 763.282 _exptl_crystal_density_diffrn 4.353 _symmetry_space_group_name_H-M 'P 1 21/a 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Sr 0.8857 0.4125 0.2499 Ga1 0.2359 0.9242 0.9329 Ge1 0.2425 0.9206 0.5622 Ge2 0.0565 0.1992 0.9408 Ga2 0.0529 0.1945 0.5685 O1 0.1926 0.0911 0.0179 O2 0.1905 0.0784 0.4833 O3 0.1162 0.3719 0.934 O4 0.1182 0.3729 0.5658 O5 0.9134 0.197 0.0737 O6 0.9007 0.1972 0.4315 O7 0.0017 0.1363 0.7605 O8 0.3282 0.925 0.745 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 Sr 0.01417 0.00709 0.00672 0.00045 0.0 0.0 Ga1 0.00859 0.00615 0.00411 0.00045 0.0 -0.00042 Ge1 0.00773 0.0052 0.00373 0.0009 0.0 0.0 Ge2 0.00816 0.00425 0.00336 0.0 0.0 0.0 Ga2 0.00859 0.00473 0.00373 0.00045 0.0004 0.0 O1 0.00987 0.00709 0.01082 0.00225 -0.0024 -0.00084 O2 0.0146 0.00425 0.00896 0.00541 0.0016 0.00294 O3 0.01159 0.00189 0.01045 -0.00225 -0.002 0.00294 O4 0.01631 0.00804 0.00746 -0.00225 0.0036 0.00084 O5 0.00472 0.00993 0.01194 -0.0018 0.0004 -0.00294 O6 0.00944 0.00804 0.00933 -0.00586 -0.004 0.00294 O7 0.02447 0.01513 0.00373 -0.00946 0.0 0.00084 O8 0.01116 0.02269 0.00784 -0.0009 -0.0012 0.00504