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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/1/53/33/1533347.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_1533347
loop_
_publ_author_name
'Zvereva, I.'
'Smirnov, Yu.'
'Gusarov, V.'
'Popova, V.'
'Choisnet, J.'
_publ_section_title
;
 Complex aluminates RE2 Sr Al2 O7 (RE = La, Nd, Sm-Ho): cation ordering
 and stability of the double perovskite slab-rocksalt layer P2/RS
 intergrowth
;
_journal_name_full               'Solid State Sciences'
_journal_page_first              343
_journal_page_last               349
_journal_volume                  5
_journal_year                    2003
_chemical_formula_sum            'Al2 O7 Sr Tb2'
_chemical_name_systematic        'Tb2 Sr (Al2 O7)'
_space_group_IT_number           139
_symmetry_space_group_name_Hall  '-I 4 2'
_symmetry_space_group_name_H-M   'I 4/m m m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   3.7044
_cell_length_b                   3.7044
_cell_length_c                   19.671
_cell_volume                     269.937
_citation_journal_id_ASTM        SSSCFJ
_cod_data_source_file            Zvereva_SSSCFJ_2003_992.cif
_cod_data_source_block           Al2O7Sr1Tb2
_cod_original_cell_volume        269.9369
_cod_original_formula_sum        'Al2 O7 Sr1 Tb2'
_cod_database_code               1533347
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-y,x,z
-x,-y,z
y,-x,z
x,-y,-z
y,x,-z
-x,y,-z
-y,-x,-z
-x,-y,-z
y,-x,-z
x,y,-z
-y,x,-z
-x,y,z
-y,-x,z
x,-y,z
y,x,z
x+1/2,y+1/2,z+1/2
-y+1/2,x+1/2,z+1/2
-x+1/2,-y+1/2,z+1/2
y+1/2,-x+1/2,z+1/2
x+1/2,-y+1/2,-z+1/2
y+1/2,x+1/2,-z+1/2
-x+1/2,y+1/2,-z+1/2
-y+1/2,-x+1/2,-z+1/2
-x+1/2,-y+1/2,-z+1/2
y+1/2,-x+1/2,-z+1/2
x+1/2,y+1/2,-z+1/2
-y+1/2,x+1/2,-z+1/2
-x+1/2,y+1/2,z+1/2
-y+1/2,-x+1/2,z+1/2
x+1/2,-y+1/2,z+1/2
y+1/2,x+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
Sr2 Sr+2 0 0 0.318 0.125 0.0
Tb2 Tb+3 0 0 0.318 0.875 0.0
Sr1 Sr+2 0 0 0.5 0.75 0.0
Tb1 Tb+3 0 0 0.5 0.25 0.0
Al1 Al+3 0 0 0.0944 1 0.0
O2 O-2 0 0.5 0.1004 1 0.0
O1 O-2 0 0 0 1 0.0
O3 O-2 0 0 0.2025 1 0.0
