data_global
_amcsd_formula_title 'Na2O2'
loop_
_publ_author_name
'Wyckoff R W G'
_journal_name_full 'Crystal Structures'
_journal_volume 1 
_journal_year 1963
_journal_page_first 85
_journal_page_last 237
_publ_section_title
;
 Second edition. Interscience Publishers, New York, New York
 Sodium peroxide
;
_database_code_amcsd 0011666
_chemical_formula_sum 'Na O'
_cell_length_a 6.208
_cell_length_b 6.208
_cell_length_c 4.460
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 148.857
_exptl_crystal_density_diffrn      2.610
_symmetry_space_group_name_H-M 'P -6 2 m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,z'
  '-x+y,-x,-z'
  'y,x,-z'
  '-y,x-y,z'
  'x-y,-y,z'
  'x,y,-z'
  '-x,-x+y,-z'
  '-x+y,-x,z'
  'y,x,z'
  '-y,x-y,-z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Na1   0.29500   0.00000   0.00000
Na2   0.63200   0.00000   0.50000
O1   0.00000   0.00000   0.66800
O2   0.33333   0.66667   0.16800