#------------------------------------------------------------------------------
#$Date: 2009-11-18 14:56:34 +0000 (Wed, 18 Nov 2009) $
#$Revision: 858 $
#$URL: svn://www.crystallography.net/cod/cif/2/2002942.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_2002942
_journal_name_full               'Acta Crystallographica, Section B'
_journal_volume                  55
_journal_year     1999
_journal_page_first     24
_journal_page_last     30
_chemical_formula_moiety     'Na1 Nb1 O3 '
_chemical_formula_sum            'Na Nb O3'
_[local]_cod_chemical_formula_sum_orig 'Na1 Nb1 O3  '
_symmetry_cell_setting     orthorhombic
_space_group_IT_number           17
_symmetry_space_group_name_Hall  'P 2c 2'
_symmetry_space_group_name_H-M   'P 2 2 21'
_[local]_cod_cif_authors_sg_H-M  'C m c m'
_[local]_cod_cif_authors_sg_Hall '-C 2c 2'
loop_
    _symmetry_equiv_pos_as_xyz
    'x, y, z'
    '-x, -y, z+1/2'
    'x, -y, -z'
    '-x, y, -z+1/2'
_cell_length_a     7.85758(3)
_cell_length_b     7.86793(3)
_cell_length_c     7.8765(3)
_cell_angle_alpha     90.00
_cell_angle_beta     90.00
_cell_angle_gamma     90.00
_cell_volume     ?
_cell_formula_units_Z     8
_cell_measurement_temperature     813
_diffrn_radiation_type     neutron
_diffrn_radiation_wavelength     ?
_refine_ls_R_factor_all     ?
loop_
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    Nb .25 .25 .0
    Na1 .0 .0022(14) .25
    Na2 .0 .5026(14) .25
    O1 .2230(4) .0 .0
    O2 .0 .2741(4) .0203(3)
    O3 .2710(3) .2489(7) .25