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#$Date: 2015-01-27 20:58:39 +0100 (Tue 27 de Jan de 2015) $
#$Revision: 130149 $
#$URL: svn://www.crystallography.net/cod/cif/1/00/12/1001291.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_1001291
loop_
_publ_author_name
'Nguyen, N'
'Er-Rakho, L'
'Michel, C'
'Choisnet, J'
'Raveau, B'
_publ_section_title
;
Intercroissance de feuilletes "Perovskites lacunaires" et de feuillets
type chlorure de sodium: les oxydes La₂₋x A₁₊ₓ Cu₂ O~6-x/2~ (A =
CA, SR)
;
_journal_coden_ASTM              MRBUAC
_journal_name_full               'Materials Research Bulletin'
_journal_page_first              891
_journal_page_last               897
_journal_paper_doi               10.1016/0025-5408(80)90212-3
_journal_volume                  15
_journal_year                    1980
_chemical_formula_structural     'LA2 SR CU2 O6'
_chemical_formula_sum            'Cu2 La2 O6 Sr'
_chemical_name_systematic        'DILANTHANUM STRONTIUM DICOPPER HEXAOXIDE'
_space_group_IT_number           139
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      139
_symmetry_space_group_name_Hall  '-I 4 2'
_symmetry_space_group_name_H-M   'I 4/m m m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   3.865(2)
_cell_length_b                   3.865(2)
_cell_length_c                   19.887(4)
_cell_volume                     297.1
_exptl_crystal_density_meas      6.7
_refine_ls_R_factor_all          0.026
_cod_database_code               1001291
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
1/2+x,1/2+y,1/2+z
1/2-x,1/2-y,1/2+z
1/2-x,1/2+y,1/2+z
1/2+x,1/2-y,1/2+z
1/2-y,1/2+x,1/2+z
1/2+y,1/2-x,1/2+z
1/2+y,1/2+x,1/2+z
1/2-y,1/2-x,1/2+z
1/2-x,1/2-y,1/2-z
1/2+x,1/2+y,1/2-z
1/2+x,1/2-y,1/2-z
1/2-x,1/2+y,1/2-z
1/2+y,1/2-x,1/2-z
1/2-y,1/2+x,1/2-z
1/2-y,1/2-x,1/2-z
1/2+y,1/2+x,1/2-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+ 2 a 0. 0. 0. 0.5 0 d
Sr1 Sr2+ 2 a 0. 0. 0. 0.5 0 d
La2 La3+ 4 e 0. 0. 0.1783(2) 0.75 0 d
Sr2 Sr2+ 4 e 0. 0. 0.1783(2) 0.25 0 d
Cu1 Cu2+ 4 e 0. 0. 0.5913(7) 1. 0 d
O1 O2- 8 g 0. 0.5 0.084(2) 1. 0 d
O2 O2- 4 e 0. 0. 0.705(2) 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
La3+ 3.000
Sr2+ 2.000
Cu2+ 2.000
O2- -2.000
