#------------------------------------------------------------------------------
#$Date: 2016-02-20 02:53:41 +0200 (Sat, 20 Feb 2016) $
#$Revision: 176768 $
#$URL: svn://www.crystallography.net/cod/cif/2/10/28/2102840.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# 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_2102840
loop_
_publ_author_name
'Wakita, Takahiro'
'Yashima, Masatomo'
_publ_section_title
;
 In situ observation of the tetragonal--cubic phase transition
 in the CeZrO₄ solid solution -- a high-temperature neutron
 diffraction study
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              384
_journal_page_last               389
_journal_paper_doi               10.1107/S0108768107007720
_journal_volume                  63
_journal_year                    2007
_chemical_formula_analytical     'Ce0.4943(3) Hf0.0035(10)  O2 Zr0.5022(10)'
_chemical_formula_moiety         'Ce0.4943 Hf0.0035 O2 Zr0.5022'
_chemical_formula_structural     'Ce0.5 O2 Zr0.5'
_chemical_formula_sum            'Ce0.5 O2 Zr0.5'
_chemical_formula_weight         147.698
_chemical_name_common            'cerium zirconiuim oxide'
_chemical_name_systematic
;
cerium zirconiuim oxide
;
_space_group_crystal_system      tetragonal
_space_group_IT_number           137
_symmetry_space_group_name_Hall  'P 4n 2n -1n'
_symmetry_space_group_name_H-M   'P 42/n m c :1'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   3.7286(2)
_cell_length_b                   3.7286(2)
_cell_length_c                   5.3215(4)
_cell_measurement_temperature    507(3)
_cell_volume                     73.982(8)
_computing_cell_refinement       'RIETAN-2000 (Izumi and Ikeda, 2000)'
_computing_publication_material  'VICS (Izumi and Dilanian, 2002)'
_computing_structure_refinement  RIETAN-2000
_computing_structure_solution    RIETAN-2000
_diffrn_ambient_temperature      507(3)
_diffrn_measurement_device_type  '150 detector system HERMES'
_diffrn_radiation_monochromator  none
_diffrn_radiation_probe          neutron
_diffrn_radiation_wavelength     1.81430(7)
_exptl_crystal_density_diffrn    6.629885
_exptl_crystal_density_method    'not measured'
_refine_ls_extinction_method     none
_refine_ls_hydrogen_treatment    noref
_refine_ls_number_parameters     32
_cod_data_source_file            og5020.cif
_cod_data_source_block           507K
_cod_original_cell_volume        73.984(10)
_cod_original_sg_symbol_H-M      'P 42/n m c'
_cod_database_code               2102840
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, z'
'-y+1/2, x+1/2, z+1/2'
'y+1/2, -x+1/2, z+1/2'
'-x+1/2, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z+1/2'
'y, x, -z'
'-y, -x, -z'
'-x+1/2, -y+1/2, -z+1/2'
'x+1/2, y+1/2, -z+1/2'
'y, -x, -z'
'-y, x, -z'
'x, -y, z'
'-x, y, z'
'-y+1/2, -x+1/2, z+1/2'
'y+1/2, x+1/2, z+1/2'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
Ce 0 0 0 0.0114(5) Uiso 0.4943
Zr 0 0 0 0.0114(5) Uiso 0.5022
Hf 0 0 0 0.0114(5) Uiso 0.0035
O 0 0.50000 0.2184(2) 0.0201(5) Uiso 1.0000
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_source
Ce Ce 'Data in RIETAN-2000, Izumi, F. & Ikeda, T. (2000)'
Zr Zr 'Data in RIETAN-2000, Izumi, F. & Ikeda, T. (2000)'
Hf Hf 'Data in RIETAN-2000, Izumi, F. & Ikeda, T. (2000)'
O O 'Data in RIETAN-2000, Izumi, F. & Ikeda, T. (2000)'
loop_
_diffrn_radiation_type
neutron
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
Ce O Zr 116.11(9)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
Ce O 2.1970(6)
Zr O 2.1970(6)
