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#$Date: 2016-02-13 14:50:18 +0200 (Sat, 13 Feb 2016) $
#$Revision: 176428 $
#$URL: svn://www.crystallography.net/cod/cif/1/52/60/1526037.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_1526037
loop_
_publ_author_name
'Fleet, M.E.'
'Liu, X.-Y.'
_publ_section_title
;
 High-pressure rare earth disilicates REE2 Si2 O7 (REE = Nd, Sm, Eu, Gd):
 type K
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              166
_journal_page_last               172
_journal_volume                  161
_journal_year                    2001
_chemical_formula_sum            'Eu2 O7 Si2'
_chemical_name_systematic        'Eu2 (Si2 O7)'
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_cell_angle_alpha                90
_cell_angle_beta                 102.671
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.5777
_cell_length_b                   6.6652
_cell_length_c                   12.2668
_cell_volume                     524.700
_citation_journal_id_ASTM        JSSCBI
_cod_data_source_file            Fleet_JSSCBI_2001_1676.cif
_cod_data_source_block           Eu2O7Si2
_cod_original_cell_volume        524.6995
_cod_original_sg_symbol_Hall     '-P 2ybc (x-z,y,z)'
_cod_database_code               1526037
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x+1/2,y+1/2,-z+1/2
-x,-y,-z
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
Si1 Si+4 0.6881 0.8256 0.5848 1 0.0
Si2 Si+4 0.6827 0.5753 0.3907 1 0.0
O7 O-2 0.8007 0.3902 0.4612 1 0.0
O5 O-2 0.5329 0.9132 0.6581 1 0.0
O1 O-2 0.565 0.7151 0.4694 1 0.0
O4 O-2 0.4972 0.5062 0.2891 1 0.0
O6 O-2 0.8568 0.6698 0.6541 1 0.0
Eu2 Eu+3 0.19756 0.68233 0.34375 1 0.0
Eu1 Eu+3 0.16795 0.89377 0.63822 1 0.0
O3 O-2 0.8311 0.7209 0.3341 1 0.0
O2 O-2 0.8247 0.0101 0.5485 1 0.0
