data_global
_chemical_name_mineral 'Pauloabibite'
loop_
_publ_author_name
'Kumada N'
'Kinomura N'
'Muto F'
_journal_name_full 'Journal of the Ceramic Society of Japan'
_journal_volume 98 
_journal_year 1990
_journal_page_first 384
_journal_page_last 388
_publ_section_title
;
 Crystal structures of ilmenite type LiNbO3 and NaNbO3
;
_database_code_amcsd 0019589
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Na Nb O3'
_cell_length_a 5.335
_cell_length_b 5.335
_cell_length_c 15.611
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 384.796
_exptl_crystal_density_diffrn      4.244
_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
Na   0.00000   0.00000   0.35700   0.01013
Nb   0.00000   0.00000   0.14940   0.00380
O   0.30600   0.04800   0.23900   0.00380