data_global
_chemical_name_mineral 'Darapskite'
loop_
_publ_author_name
'Sabelli C'
_journal_name_full 'Atti della Accademia Nazionale dei Lincei'
_journal_volume 42 
_journal_year 1967
_journal_page_first 874
_journal_page_last 887
_publ_section_title
;
 La struttura della darapskite
;
_database_code_amcsd 0012051
_chemical_formula_sum 'Na3 S N O8 H2'
_cell_length_a 10.564
_cell_length_b 6.911
_cell_length_c 5.194
_cell_angle_alpha 90.
_cell_angle_beta 102.78
_cell_angle_gamma 90
_cell_volume 369.808
_exptl_crystal_density_diffrn      2.201
_symmetry_space_group_name_H-M 'P 21/m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na1   0.27460   0.49470   0.13530   0.02305
Na2   0.59470   0.25000   0.27290   0.02077
S   0.57880   0.75000   0.32200   0.01051
N   0.88130   0.25000   0.42750   0.02394
O1   0.63460   0.57510   0.23250   0.02799
O2   0.43600   0.75000   0.21980   0.02102
O3   0.39620   0.25000   0.38630   0.02090
O4   0.82950   0.25000   0.18970   0.02812
Wat5   0.11340   0.25000   0.04410   0.02609
O6   0.99980   0.25000   0.49820   0.04167
O7   0.18620   0.75000   0.40360   0.02964