data_global
_amcsd_formula_title 'H8 Na4 O16 P4'
loop_
_publ_author_name
'Averbuch-Pouchot M'
'Durif A'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 58 
_journal_year 1985
_journal_page_first 119
_journal_page_last 132
_publ_section_title
;
 Contribution to the crystal chemistry of tetrametaphosphates (I).
 _cod_database_code 1007176
;
_database_code_amcsd 0013552
_chemical_formula_sum 'P Na O4 H2'
_cell_length_a 9.667
_cell_length_b 12.358
_cell_length_c 6.17
_cell_angle_alpha 90
_cell_angle_beta 92.27
_cell_angle_gamma 90
_cell_volume 736.519
_exptl_crystal_density_diffrn      2.164
_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
P1   0.18699  -0.00348   0.40241
P2   0.49050   0.32181   0.45642
Na1   0.07184   0.12550   0.93910
Na2   0.47394   0.06384   0.73680
O1   0.11900   0.09930   0.51730
O2   0.36180   0.40310   0.43650
O3   0.16220   0.50730   0.56660
O4   0.37850   0.48000   0.81780
O5   0.48010   0.25210   0.64980
O6   0.50410   0.27430   0.23840
O7   0.11870   0.41600   0.05930
O8   0.29570   0.18350   0.94920
H1   0.20100   0.41700   0.00200
H2   0.11700   0.36000   0.13700
H3   0.33700   0.19500   0.05200
H4   0.33600   0.22100   0.85600