#------------------------------------------------------------------------------
#$Date: 2016-02-13 14:50:18 +0200 (Sat, 13 Feb 2016) $
#$Revision: 176428 $
#$URL: svn://www.crystallography.net/cod/cif/1/53/34/1533487.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_1533487
loop_
_publ_author_name
'Aoyagi, R.'
'Takeda, H.'
'Okamura, S.'
'Shiosaki, T.'
_publ_section_title
;
 Synthesis and electrical properties of sodium bismuth niobate Na0.5 Bi2.5
 Nb2 O9
;
_journal_name_full               'Materials Research Bulletin'
_journal_page_first              25
_journal_page_last               32
_journal_volume                  38
_journal_year                    2003
_chemical_formula_sum            'Bi2.56 Na0.44 Nb2 O9'
_chemical_name_systematic        '(Na0.44 Bi0.56) Bi2 (Nb2 O9)'
_space_group_IT_number           36
_symmetry_space_group_name_Hall  'A -2 2a'
_symmetry_space_group_name_H-M   'A 21 a m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.4997
_cell_length_b                   5.4603
_cell_length_c                   24.951
_cell_volume                     749.279
_citation_journal_id_ASTM        MRBUAC
_cod_data_source_file            Aoyagi_MRBUAC_2003_540.cif
_cod_data_source_block           Bi2.56Na0.44Nb2O9
_cod_original_cell_volume        749.2788
_cod_original_sg_symbol_Hall     'C 2c -2 (z,y,-x)'
_cod_database_code               1533487
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x+1/2,-y,-z
x,y,-z
x+1/2,-y,z
x,y+1/2,z+1/2
x+1/2,-y+1/2,-z+1/2
x,y+1/2,-z+1/2
x+1/2,-y+1/2,z+1/2
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Nb1 Nb+5 0.546 0.753 0.4157 1 0.0
O2 O-2 0.571 0.651 0.3427 1 0.0
O3 O-2 0.792 0.952 0.259 1 0.0
Bi1 Bi+2 0 0.264 0 0.56 0.0
O1 O-2 0.595 0.26 0 1 0.0
O4 O-2 0.823 0.995 0.068 1 0.0
O5 O-2 0.878 0.98 0.585 1 0.0
Na1 Na+1 0 0.264 0 0.44 0.0
Bi2 Bi+2 0.497 0.7711 0.19954 1 0.0
