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#$Date: 2016-02-13 21:28:24 +0200 (Sat, 13 Feb 2016) $
#$Revision: 176429 $
#$URL: svn://www.crystallography.net/cod/cif/1/53/23/1532388.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_1532388
loop_
_publ_author_name
'Yamashita, H.'
'Onodera, A.'
'Murata, W.'
'Yoshio, K.'
_publ_section_title
;
 Structural changes and ferroelectricity in Bi-layered Sr Bi2 Ta2 O9
;
_journal_name_full               'Japanese Journal of Applied Physics, Part 1'
_journal_page_first              7076
_journal_page_last               7079
_journal_volume                  41
_journal_year                    2002
_chemical_formula_sum            'Bi2 O9 Sr Ta2'
_chemical_name_systematic        'Sr (Bi2 Ta2 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                   5.531
_cell_length_b                   5.534
_cell_length_c                   25.984
_cell_volume                     795.333
_citation_journal_id_ASTM        JAPNDE
_cod_data_source_file            Yamashita_JAPNDE_2002_1941.cif
_cod_data_source_block           Bi2O9Sr1Ta2
_cod_original_cell_volume        795.3326
_cod_original_sg_symbol_Hall     'C 2c -2 (z,y,-x)'
_cod_original_formula_sum        'Bi2 O9 Sr1 Ta2'
_cod_database_code               1532388
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
Bi1 Bi+3 0.4833 0.7738 0.2011 1 0.0
O3 O-2 0.7057 0.015 0.2623 1 0.0
O4 O-2 0.7523 0 0.073 1 0.0
Sr1 Sr+2 0 0.261 0 1 0.0
O5 O-2 0.7854 0.9744 0.585 1 0.0
Ta1 Ta+5 0.5177 0.7468 0.4143 1 0.0
O1 O-2 0.5365 0.3335 0 1 0.0
O2 O-2 0.4904 0.7316 0.3402 1 0.0
