#------------------------------------------------------------------------------
#$Date: 2017-09-02 02:05:53 +0300 (Sat, 02 Sep 2017) $
#$Revision: 200099 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/00/61/1006131.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_1006131
loop_
_publ_author_name
'Medarde, M.'
'Rodriguez-Carvajal, J.'
_publ_section_title
;
 Oxygen vacancy ordering in La₂₋ₓSrₓNiO~4-δ~ (0 <= x <= 0.5):
 the crystal structure and defects investigated by neutron diffraction
;
_journal_coden_ASTM              ZPCMDN
_journal_issue                   3
_journal_name_full
;
 Zeitschrift für Physik B: Condensed Matter
;
_journal_page_first              307
_journal_page_last               315
_journal_paper_doi               10.1007/s002570050293
_journal_volume                  102
_journal_year                    1997
_chemical_formula_structural     'La2 (Ni O4)'
_chemical_formula_sum            'La2 Ni O4'
_chemical_name_systematic        'Dilanthanum niccolate'
_space_group_IT_number           64
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      64
_symmetry_space_group_name_Hall  '-B 2ab 2'
_symmetry_space_group_name_H-M   'B m a b'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.4324(4)
_cell_length_b                   5.5277(4)
_cell_length_c                   12.488(1)
_cell_volume                     375.0
_refine_ls_R_factor_all          0.0133
_cod_database_code               1006131
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,-y,-z
x,1/2+y,1/2-z
x,1/2-y,1/2+z
-x,-y,-z
-x,y,z
-x,1/2-y,1/2+z
-x,1/2+y,1/2-z
1/2+x,y,1/2+z
1/2+x,-y,1/2-z
1/2+x,1/2+y,-z
1/2+x,1/2-y,z
1/2-x,-y,1/2-z
1/2-x,y,1/2+z
1/2-x,1/2-y,z
1/2-x,1/2+y,-z
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
La1 La3+ 8 f 0. -0.010(1) 0.3637(3) 1. 0 d
Ni1 Ni2+ 4 a 0. 0. 0. 1. 0 d
O1 O2- 8 e 0.25 0.25 -0.009(1) 1. 0 d
O2 O2- 8 f 0. 0.044(1) 0.1783(5) 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
La3+ 3.000
Ni2+ 2.000
O2- -2.000
