data_global
_chemical_name_mineral 'Glauberite'
loop_
_publ_author_name
'Cocco G'
'Corazza E'
'Sabelli C'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 122 
_journal_year 1965
_journal_page_first 175
_journal_page_last 184
_publ_section_title
;
 The crystal structure of glauberite, CaNa2(SO4)2
;
_database_code_amcsd 0018655
_chemical_compound_source 'Chinchon (Madrid), Spain'
_chemical_formula_sum 'Na2 Ca S2 O8'
_cell_length_a 10.158
_cell_length_b 8.333
_cell_length_c 8.551
_cell_angle_alpha 90
_cell_angle_beta 112.333
_cell_angle_gamma 90
_cell_volume 669.521
_exptl_crystal_density_diffrn      2.760
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Na   0.36210   0.05500   0.05970   0.02064
Ca   0.00000   0.06400   0.25000   0.00697
S   0.31530   0.28580   0.31260   0.00697
O1   0.16180   0.27430   0.27350   0.00532
O2   0.33710   0.33790   0.15790   0.00608
O3   0.38430   0.13050   0.36440   0.00937
O4   0.37410   0.41220   0.44110   0.01026