data_global _chemical_name_mineral 'Beryllonite' loop_ _publ_author_name 'Golovastikov N I' _journal_name_full 'Soviet Physics Crystallography' _journal_volume 6 _journal_year 1962 _journal_page_first 733 _journal_page_last 739 _publ_section_title ; The crystal structure of beryllonite (NaBePO4) ; _database_code_amcsd 0015544 _chemical_compound_source 'Stoneham, Maine, USA' _chemical_formula_sum 'Na Be P O4' _cell_length_a 8.16 _cell_length_b 7.79 _cell_length_c 14.08 _cell_angle_alpha 90 _cell_angle_beta 90.0 _cell_angle_gamma 90 _cell_volume 895.015 _exptl_crystal_density_diffrn 2.827 _symmetry_space_group_name_H-M 'P 1 21/n 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Na1 0.24800 0.00400 0.24800 Na2 0.74700 0.47200 0.08400 Na3 0.76300 0.03100 0.06900 Bel 0.91700 0.16100 0.23900 Be2 0.10300 0.66200 0.08200 Be3 0.43100 0.16500 0.09000 P1 0.92100 0.78800 0.23800 P2 0.10600 0.29100 0.08100 P3 0.43200 0.79000 0.09200 O1 0.43500 0.26600 0.19200 O2 0.06600 0.26800 0.18800 O3 0.25200 0.77400 0.12300 O4 0.73900 0.25300 0.21400 O5 0.94800 0.25300 0.02200 O6 0.55200 0.25200 0.01600 O7 0.94900 0.66400 0.15500 O8 0.23900 0.17100 0.05300 O9 0.53500 0.66400 0.14800 Ol0 0.92300 0.96400 0.19800 O11 0.16400 0.47300 0.06200 O12 0.49500 0.97100 0.11000