#------------------------------------------------------------------------------
#$Date: 2016-02-14 16:26:36 +0200 (Sun, 14 Feb 2016) $
#$Revision: 176435 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/55/2005542.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_2005542
loop_
_publ_author_name
'Khasanova, N. R.'
'Izumi, F.'
'Hiroi, Z.'
'Takano, M.'
'Huang, Q.'
'Santoro, A.'
_publ_section_title
;
 Redetermination of the Structure of La₂Cu₂O₅ by Neutron Powder
 Diffraction
;
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2381
_journal_page_last               2384
_journal_paper_doi               10.1107/S0108270196006646
_journal_volume                  52
_journal_year                    1996
_chemical_formula_sum            'Cu2 La2 O5'
_chemical_formula_weight         484.90
_chemical_name_systematic        'dicopper(II) lanthanum cuprate'
_space_group_IT_number           55
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2 2ab'
_symmetry_space_group_name_H-M   'P b a m'
_audit_creation_method           using_CIFIO
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.53528(14)
_cell_length_b                   10.4490(3)
_cell_length_c                   3.87265(8)
_cell_measurement_reflns_used    294
_cell_measurement_temperature    10
_cell_measurement_theta_max      80
_cell_measurement_theta_min      9
_cell_volume                     223.987(10)
_computing_molecular_graphics    'ATOMS (Dowty, 1991)'
_computing_structure_refinement  'RIETAN94 (Izumi, 1993; Kim & Izumi, 1994)'
_diffrn_ambient_temperature      10
_diffrn_measurement_method       'angle-dispersive method'
_diffrn_radiation_monochromator  'Cu (311)'
_diffrn_radiation_probe          neutron
_diffrn_radiation_source         'NIST research reactor'
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     1.5396
_diffrn_reflns_number            294
_diffrn_reflns_theta_max         80
_diffrn_reflns_theta_min         9
_diffrn_standards_interval_count 0.05
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    7.190
_exptl_crystal_description       'powder sample'
_refine_ls_number_constraints    0
_refine_ls_number_parameters     32
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0263
_cod_data_source_file            oh1097.cif
_cod_data_source_block           10K
_cod_original_formula_sum        'La2 Cu2 O5'
_cod_database_code               2005542
loop_
_symmetry_equiv_pos_as_xyz
'+x, +y, +z'
'-x, -y, +z'
'1/2+x, 1/2-y, -z'
'1/2-x, 1/2+y, -z'
'-x, -y, -z'
'+x, +y, -z'
'1/2-x, 1/2+y, +z'
'1/2+x, 1/2-y, +z'
loop_
_atom_site_label
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_B_iso_or_equiv
La h 0.3119(3) 0.3603(2) .5 0.41(4)
Cu g 0.2922(4) 0.1060(2) 0 0.23(5)
O1 h 0.2875(5) 0.1015(3) .5 0.98(5)
O2 g 0.0767(4) 0.2901(2) 0 0.35(5)
O3 a 0 0 0 0.65(8)
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle
_geom_angle_publ_flag
O1 Cu O1 . 1_554 176.8(2) yes
O1 Cu O2 . . 90.79(12) yes
O1 Cu O2 1_554 . 90.79(12) yes
O1 Cu O2 . 3_555 91.42(11) yes
O1 Cu O2 1_554 3_555 91.42(11) yes
O1 Cu O3 . . 88.58(11) yes
O1 Cu O3 1_554 . 88.58(11) yes
O2 Cu O2 . 3_555 87.21(8) yes
O2 Cu O3 . . 92.60(11) yes
O2 Cu O3 3_555 . 179.81(15) yes
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
La O1 4_556 2.579(4) yes
La O1 3_556 2.663(4) yes
La O1 . 2.709(4) yes
La O1 3_456 2.930(3) yes
La O2 . 2.446(2) yes
La O2 1_556 2.446(2) yes
La O2 3_555 2.893(3) yes
La O2 3_556 2.893(3) yes
La O3 3_555 2.6388(12) yes
La O3 3_556 2.6388(12) yes
Cu O1 . 1.93710(10) yes
Cu O1 1_554 1.93710(10) yes
Cu O2 3_555 1.913(3) yes
Cu O2 . 2.263(3) yes
Cu O3 . 1.960(2) yes
