data_global _chemical_name_mineral 'Germanium' loop_ _publ_author_name 'Kasper J S' 'Richards S M' _journal_name_full 'Acta Crystallographica' _journal_volume 17 _journal_year 1964 _journal_page_first 752 _journal_page_last 755 _publ_section_title ; The crystal structures of new forms of silicon and germanium ; _database_code_amcsd 0009283 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Ge' _cell_length_a 5.93 _cell_length_b 5.93 _cell_length_c 6.98 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 245.451 _exptl_crystal_density_diffrn 5.895 _symmetry_space_group_name_H-M 'P 43 21 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'y,x,-z' '1/2-y,1/2+x,3/4+z' '1/2-x,1/2+y,3/4-z' '-x,-y,1/2+z' '-y,-x,1/2-z' '1/2+y,1/2-x,1/4+z' '1/2+x,1/2-y,1/4-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ge1 0.09120 0.09120 0.00000 0.05712 Ge2 0.17300 0.37840 0.24860 0.01456