#------------------------------------------------------------------------------
#$Date: 2017-07-04 18:12:29 +0200 (mar 04 de jul de 2017) $
#$Revision: 198388 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/29/2002942.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# 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_2002942
loop_
_publ_author_name
'Darlington, C. N. W.'
'Knight, K. S.'
_publ_section_title
;
 High-temperature phases of NaNbO₃ and NaTaO₃
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              24
_journal_page_last               30
_journal_paper_doi               10.1107/S010876819800963X
_journal_volume                  55
_journal_year                    1999
_chemical_formula_moiety         'Na1 Nb1 O3 '
_chemical_formula_sum            'Na Nb O3'
_space_group_crystal_system      orthorhombic
_space_group_IT_number           63
_space_group_name_Hall           '-C 2c 2'
_space_group_name_H-M_alt        'C m c m'
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.85758(3)
_cell_length_b                   7.86793(3)
_cell_length_c                   7.8765(3)
_cell_measurement_temperature    813
_cell_volume                     486.948(19)
_diffrn_radiation_probe          neutron
_diffrn_radiation_type           neutron
_cod_data_source_file            bm0015.cif
_cod_data_source_block           Nb813
_cod_depositor_comments
;
 Changing the space group from 'P 2c 2' to '-C 2c 2' after consulting
 the original publication. All related space group information was changed
 accordingly.

 Antanas Vaitkus,
 2017-07-04
;
_cod_original_formula_sum        'Na1 Nb1 O3  '
_cod_database_code               2002942
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 x,y,z
2 -x,-y,z+1/2
3 x,-y,-z
4 -x,y,-z+1/2
5 -x,-y,-z
6 x,y,-z+1/2
7 -x,y,z
8 x,-y,z+1/2
9 x+1/2,y+1/2,z
10 -x+1/2,-y+1/2,z+1/2
11 x+1/2,-y+1/2,-z
12 -x+1/2,y+1/2,-z+1/2
13 -x+1/2,-y+1/2,-z
14 x+1/2,y+1/2,-z+1/2
15 -x+1/2,y+1/2,z
16 x+1/2,-y+1/2,z+1/2
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
