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#$Date: 2015-01-27 21:58:39 +0200 (Tue, 27 Jan 2015) $
#$Revision: 130149 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/00/88/1008857.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_1008857
loop_
_publ_author_name
'Bordet, P'
'Chaillout, C'
'Fournier, T'
'Marezio, M'
'Kaldis, E'
'Karpinski, J'
'Jilek, E'
_publ_section_title
;
Evidence by x-ray diffraction for two apical oxygen sites in a copper-
deficient Y Ba2 Cu2.78 O7 crystal
;
_journal_coden_ASTM              PRBMDO
_journal_issue                   6
_journal_name_full
;
Physical Review, Serie 3. B - Condensed Matter (18,1978-)
;
_journal_page_first              3465
_journal_page_last               3468
_journal_paper_doi               10.1103/PhysRevB.47.3465
_journal_volume                  47
_journal_year                    1993
_chemical_formula_structural     'Y Ba2 Cu2.78 O7'
_chemical_formula_sum            'Ba2 Cu2.78 O7 Y'
_chemical_name_systematic        'Yttrium barium copper oxide (1/2/2.8/7)'
_space_group_IT_number           123
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      123
_symmetry_space_group_name_Hall  '-P 4 2'
_symmetry_space_group_name_H-M   'P 4/m m m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            1
_cell_length_a                   3.8764(4)
_cell_length_b                   3.8764(4)
_cell_length_c                   11.624(1)
_cell_volume                     174.7
_refine_ls_R_factor_all          0.047
_cod_database_code               1008857
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,z
-x,y,z
x,-y,z
-y,x,z
y,-x,z
y,x,z
-y,-x,z
-x,-y,-z
x,y,-z
x,-y,-z
-x,y,-z
y,-x,-z
-y,x,-z
-y,-x,-z
y,x,-z
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_22
_atom_site_aniso_U_23
_atom_site_aniso_U_33
Y1 0.0046(2) 0. 0. 0.0046(2) 0. 0.0085(3)
Ba1 0.0147(2) 0. 0. 0.0147(2) 0. 0.0114(2)
Cu1 0.0235(9) 0. 0. 0.0235(9) 0. 0.0081(9)
Cu2 0.0041(3) 0. 0. 0.0041(3) 0. 0.0104(4)
O1 0.0041(6) 0. 0. 0.0041(6) 0. 0.09(1)
O2 0.006(1) 0. 0. 0.011(2) 0. 0.011(2)
O3 0.30(8) 0. 0. 0.28(7) 0. 0.015(7)
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
Y1 Y3+ 1 d 0.5 0.5 0.5 1. 0 d
Ba1 Ba2+ 2 h 0.5 0.5 0.18937(5) 1. 0 d
Cu1 Cu3+ 1 a 0. 0. 0. 0.787(7) 0 d
Cu2 Cu3+ 2 g 0. 0. 0.3602(1) 1. 0 d
O1 O2- 2 g 0. 0. 0.143(1) 0.96(3) 0 d
O2 O2- 4 i 0.5 0. 0.3763(3) 1. 0 d
O3 O2- 2 f 0.5 0. 0. 0.54(2) 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
Y3+ 3.000
Ba2+ 2.000
Cu3+ 2.520
O2- -2.000