data_global
_amcsd_formula_title 'Na0.5 Nb2 O12 P3'
loop_
_publ_author_name
'Leclaire A'
'Borel M'
'Grandin A'
'Raveau B'
_journal_name_full 'Materials Research Bulletin'
_journal_volume 26 
_journal_year 1991
_journal_page_first 207
_journal_page_last 211
_publ_section_title
;
 A niobium phosphate with a nasicon structure: Na0.5Nb2(PO4)3
 _cod_database_code 1001500
;
_database_code_amcsd 0014356
_chemical_formula_sum 'Nb2 Na.5 P3 O12'
_cell_length_a 8.7362
_cell_length_b 8.7362
_cell_length_c 22.093
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 1460.261
_exptl_crystal_density_diffrn      3.290
_symmetry_space_group_name_H-M 'R -3 c'
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'
  'x,x-y,1/2+z'
  '2/3+x,1/3+x-y,5/6+z'
  '1/3+x,2/3+x-y,1/6+z'
  'y,x,1/2-z'
  '2/3+y,1/3+x,5/6-z'
  '1/3+y,2/3+x,1/6-z'
  '-x+y,y,1/2+z'
  '2/3-x+y,1/3+y,5/6+z'
  '1/3-x+y,2/3+y,1/6+z'
  '-x,-x+y,1/2-z'
  '2/3-x,1/3-x+y,5/6-z'
  '1/3-x,2/3-x+y,1/6-z'
  '-y,-x,1/2+z'
  '2/3-y,1/3-x,5/6+z'
  '1/3-y,2/3-x,1/6+z'
  'x-y,-y,1/2-z'
  '2/3+x-y,1/3-y,5/6-z'
  '1/3+x-y,2/3-y,1/6-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_occupancy
Nb1   0.00000   0.00000   0.14377   1.00000
Na1   0.00000   0.00000   0.00000   0.50000
P1   0.28820   0.00000   0.25000   1.00000
O1   0.02020   0.20060   0.19320   1.00000
O2   0.19490   0.16960   0.08810   1.00000