#------------------------------------------------------------------------------
#$Date: 2008-01-26 13:05:32 +0000 (Sat, 26 Jan 2008) $
#$Revision: 19 $
#$URL: svn://www.crystallography.net/cod/cif/1/1006087.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_1006087
_chemical_name_systematic          'Diytterbium dicopper oxide'
_chemical_formula_structural       'Yb2 Cu2 O5'
_chemical_formula_sum              'Cu2 O5 Yb2'
_publ_section_title
;
Structural characterization of R2 Cu2 O5 (R=Yb,Tm,Er,Y and Ho) oxides
by neutron diffraction
;
loop_
_publ_author_name
  'Garcia-Munoz, J L'
  'Rodriguez-Carvajal, J'
_journal_name_full                 'Journal of Solid State Chemistry'
_journal_coden_ASTM                JSSCBI
_journal_volume                    115
_journal_year                      1995
_journal_page_first                324
_journal_page_last                 331
_cell_length_a                     10.7290(1)
_cell_length_b                     3.4355(1)
_cell_length_c                     12.3531(1)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       455.3
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'P n a 21'
_symmetry_Int_Tables_number        33
_symmetry_cell_setting             orthorhombic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Yb3+   3.000
  Cu2+   2.000
  O2-   -2.000
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
  Yb1   Yb3+   4 a 0.2088(6) 0.2269(7) 0. 1.  0 d
  Yb2   Yb3+   4 a 0.0416(1) 0.2231(6) 0.3304(2) 1.  0 d
  Cu1   Cu2+   4 a 0.9907(4) 0.661(1) 0.113(1) 1.  0 d
  Cu2   Cu2+   4 a 0.2608(4) 0.661(2) 0.217(1) 1.  0 d
  O1    O2-    4 a 0.174(1) 0.729(2) 0.357(1) 1.  0 d
  O2    O2-    4 a 0.323(1) 0.718(2) 0.064(1) 1.  0 d
  O3    O2-    4 a 0.125(1) 0.313(1) 0.165(1) 1.  0 d
  O4    O2-    4 a 0.428(1) 0.778(2) 0.263(1) 1.  0 d
  O5    O2-    4 a 0.425(2) 0.228(3) 0.476(2) 1.  0 d
_refine_ls_R_factor_all            0.042