#------------------------------------------------------------------------------
#$Date: 2024-05-29 16:00:33 +0200 (Wed 29 de May de 2024) $
#$Revision: 292100 $
#$URL: svn://www.crystallography.net/cod/cif/9/01/59/9015926.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# 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_9015926
loop_
_publ_author_name
'Jacobsen, H.'
'Lissner, F.'
'Manek, E.'
'Meyer, G.'
_publ_section_title
;
 Crystal structures of dieuropium(II) ditantalum heptoxide,
 Eu2Ta2O7 and europium(II) ditantalum hexoxide, EuTa2O6
;
_journal_name_full               'Zeitschrift fur Kristallographie'
_journal_page_first              547
_journal_page_last               548
_journal_volume                  211
_journal_year                    1996
_chemical_compound_source        Synthetic
_chemical_formula_sum            'Eu O6 Ta2'
_chemical_name_mineral           Tantalaeschynite-(Eu)
_space_group_IT_number           62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   11.02
_cell_length_b                   7.640
_cell_length_c                   5.610
_cell_formula_units_Z            4
_cell_volume                     472.322
_database_code_amcsd             0018933
_exptl_crystal_density_diffrn    8.576
_cod_original_formula_sum        'Eu Ta2 O6'
_cod_database_code               9015926
loop_
_space_group_symop_operation_xyz
x,y,z
x,1/2-y,z
-x,1/2+y,-z
1/2-x,1/2+y,1/2+z
1/2+x,1/2-y,1/2-z
1/2+x,y,1/2-z
1/2-x,-y,1/2+z
-x,-y,-z
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Eu 0.01400 0.00870 0.01360 0.00000 0.00100 0.00000
Ta 0.00820 0.00800 0.01190 0.00000 0.00020 0.00000
O1 0.01600 0.00800 0.01600 0.00000 0.00200 -0.00200
O2 0.01000 0.00800 0.01600 -0.00100 0.00200 -0.00400
O3 0.03000 0.00700 0.01600 0.00000 0.00400 0.00000
O4 0.01900 0.00200 0.01700 0.00000 0.00000 0.00000
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Eu 0.04020 0.25000 0.53870
Ta 0.14237 0.99594 0.03770
O1 0.97400 0.03500 0.22100
O2 0.21400 0.04800 0.36100
O3 0.14400 0.25000 0.96700
O4 0.37200 0.25000 0.64300
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0018933
