data_global
_chemical_name_mineral 'Humberstonite'
loop_
_publ_author_name
'Burns P C'
'Hawthorne F C'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 32 
_journal_year 1994
_journal_page_first 381
_journal_page_last 385
_publ_section_title
;
 The crystal structure of humberstonite, a mixed sulfate-nitrate mineral
;
_database_code_amcsd 0005366
_chemical_formula_sum 'N2 S6 K3 Mg Na8 O36'
_cell_length_a 10.9055
_cell_length_b 10.9055
_cell_length_c 24.3949
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 2512.585
_exptl_crystal_density_diffrn      2.224
_symmetry_space_group_name_H-M 'R -3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '2/3+x,1/3+y,1/3+z'
  '1/3+x,2/3+y,2/3+z'
  'y,-x+y,-z'
  '2/3+y,1/3-x+y,1/3-z'
  '1/3+y,2/3-x+y,2/3-z'
  '-x+y,-x,z'
  '2/3-x+y,1/3-x,1/3+z'
  '1/3-x+y,2/3-x,2/3+z'
  '-x,-y,-z'
  '2/3-x,1/3-y,1/3-z'
  '1/3-x,2/3-y,2/3-z'
  '-y,x-y,z'
  '2/3-y,1/3+x-y,1/3+z'
  '1/3-y,2/3+x-y,2/3+z'
  'x-y,x,-z'
  '2/3+x-y,1/3+x,1/3-z'
  '1/3+x-y,2/3+x,2/3-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
N   0.33333   0.66667   0.09260   0.02660
S   0.34370   0.17100   0.27470   0.01267
K   0.50000   0.00000   0.00000   0.01140
Mg   0.00000   0.00000   0.00000   0.00380
Na1   0.00000   0.00000   0.12500   0.02026
Na2   0.64590   0.82100   0.09170   0.01140
O1   0.50100   0.25700   0.27540   0.01140
O2   0.28500   0.12800   0.32740   0.01140
O3   0.28700   0.24800   0.24600   0.01140
O4   0.30800   0.03300   0.24200   0.01140
O5   0.09300   0.89500   0.16930   0.01140
O6   0.41700   0.79700   0.09580   0.01140