#------------------------------------------------------------------------------
#$Date: 2013-05-09 16:53:25 +0300 (Thu, 09 May 2013) $
#$Revision: 86000 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/41/9014103.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9014103
loop_
_publ_author_name
'Johnston, K. E.'
'Tang, C. C.'
'Parker, J. E.'
'Knight, K. S.'
'Lightfoot, P.'
'Ashbrook, S. E.'
_publ_section_title
;
 The polar phase of NaNbO3: a combined study by powder diffraction,
 solid-state NMR and first-principles calculations
 Note: this is a polymorph of lueshite
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8732
_journal_page_last               8746
_journal_volume                  132
_journal_year                    2010
_chemical_compound_source        Synthetic
_chemical_formula_sum            'Na Nb O3'
_chemical_name_mineral           Lueshite
_space_group_IT_number           26
_symmetry_space_group_name_Hall  'P -2a 2a'
_symmetry_space_group_name_H-M   'P 21 m a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   5.571
_cell_length_b                   7.766
_cell_length_c                   5.513
_cell_volume                     238.517
_database_code_amcsd             0018685
_exptl_crystal_density_diffrn    4.564
_[local]_cod_chemical_formula_sum_orig 'Nb Na O3'
_cod_database_code               9014103
loop_
_space_group_symop_operation_xyz
x,y,z
1/2+x,y,-z
x,-y,z
1/2+x,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Nb 0.26250 0.25000 0.24660 0.00200
Na 0.25960 0.00000 0.74810 0.00500
Na 0.29150 0.50000 0.73270 0.02240
O1 0.24090 0.00000 0.31240 0.00530
O2 0.22570 0.50000 0.19280 0.00370
O3 0.01310 0.27900 0.52720 0.01840
O4 -0.04900 0.21970 0.03600 0.00610