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#$Date: 2008-03-30 12:21:05 +0200 (Sun, 30 Mar 2008) $
#$Revision: 321 $
#$URL: svn://www.crystallography.net/cod/cif/2/2100388.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_2100388
loop_
_publ_author_name
'Yashima, Masatomo'
'Tsunekawa, Shin'
_publ_section_title
;
Crystal structures and the oxygen deficiency of tetragonal and monoclinic
zirconium oxide nanoparticles
;
_journal_coeditor_code           OG5013
_journal_issue                   1
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              161
_journal_page_last               164
_journal_volume                  61
_journal_year                    2006
_chemical_formula_analytical     'O2-x Zr0.994 Hf0.006'
_chemical_formula_iupac          'O2-x Zr'
_chemical_formula_moiety         'O2-x Zr'
_chemical_formula_structural     'O4-2x 2Zr'
_chemical_formula_sum            'O4-2x 2Zr'
_chemical_formula_weight         246.49
_chemical_name_common            'zirconium oxide'
_chemical_name_systematic
;
zirconium oxide
;
_symmetry_space_group_name_H-M   'P 42/n m c'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                90.0
_cell_formula_units_Z            2
_cell_length_a                   3.58651(8)
_cell_length_b                   3.58651(8)
_cell_length_c                   5.16658(15)
_cell_measurement_temperature    298
_cell_volume                     66.458(3)
_computing_cell_refinement       'RIETAN-2000 (Izumi and Ikeda, 2000)'
_computing_data_collection       'RIGAKU software (Toraya et al., 1996)'
_computing_molecular_graphics    'VENUS [Izumi and Dilanian (2002)]'
_computing_structure_refinement  RIETAN-2000
_computing_structure_solution    RIETAN-2000
_diffrn_ambient_temperature      298
_diffrn_measurement_device_type
;a multiple-detector system with Ge(111) analyzer crystals, Soller slits and
scintillation counters (Toraya et al., 1996)
;
_diffrn_radiation_monochromator  'Ge(111) analyzer crystals'
_diffrn_radiation_type           'monochromatized synchrotron X-ray 1.20200'
_diffrn_radiation_wavelength     'CuK\a~2~ 1.54439'
_exptl_crystal_density_diffrn    6.158914
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             111.192
_refine_ls_goodness_of_fit_all   1.30
_refine_ls_number_parameters     '57 (13 for structural parameters)'
_space_group_crystal_system      tetragonal
_space_group_name_H-M_alt        'P 42/n m c'
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
1 x,y,z
2 -x,-y,z
3 -y+1/2,x+1/2,z+1/2
4 y+1/2,-x+1/2,z+1/2
5 -x+1/2,y+1/2,-z+1/2
6 x+1/2,-y+1/2,-z+1/2
7 y,x,-z
8 -y,-x,-z
9 -x+1/2,-y+1/2,-z+1/2
10 x+1/2,y+1/2,-z+1/2
11 y,-x,-z
12 -y,x,-z
13 x,-y,z
14 -x,y,z
15 -y+1/2,-x+1/2,z+1/2
16 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
_atom_site_type_symbol
Zr0.994Hf0.006 0 0 0 0.3850(10) Biso 1 M
O 0 0.5 0.2042(2) 0.934(17) Biso 0.984(4) O
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Zr4+ Zr4+ -0.685 1.445 'S. Sasaki (1989) KEK Report 88-14'
Hf4+ Hf4+ -8.812 9.000 'S. Sasaki (1989) KEK Report 88-14'
O2- O2- 0.029 0.019 'S. Sasaki (1989) KEK Report 88-14'
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
M O ?_? 2.3562(6) yes
M O ?_? 2.0805(5) yes