#------------------------------------------------------------------------------
#$Date: 2014-07-11 15:35:18 +0100 (Fri, 11 Jul 2014) $
#$Revision: 120071 $
#$URL: svn://www.crystallography.net/cod/cif/1/00/15/1001508.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_1001508
_chemical_name_systematic          'Tetrabarium disodium decaniobate'
_chemical_formula_structural       'Ba4 Na2 (Nb10 O30)'
_chemical_formula_sum              'Ba4 Na2 Nb10 O30'
_publ_section_title
;
X-ray structural determination of the quasi-commensurate phase of
barium sodium niobate
;
loop_
_publ_author_name
  'Labbe, P'
  'Leligny, H'
  'Raveau, B'
  'Schneck, J'
  'Toledano, J C'
_journal_name_full                 'Journal of Physics: Condensed Matter'
_journal_coden_ASTM                JCOMEL
_journal_volume                    2
_journal_year                      1989
_journal_page_first                25
_journal_page_last                 43
_cell_length_a                     35.1869(22)
_cell_length_b                     17.6202(18)
_cell_length_c                     7.9876(10)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       4952.3
_cell_formula_units_Z              8
_symmetry_space_group_name_H-M     'B b m 2'
_symmetry_Int_Tables_number        40
_symmetry_cell_setting             orthorhombic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  'x,1/2-y,z'
  '-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,1/2+z'
  '1/2-x,1/2+y,1/2+z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Nb5+   5.000
  Na1+   1.000
  Ba2+   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
  Nb1   Nb5+   8 c 0.00073(3) 0. 0.00926(9) 0.5  0 d
  Nb2   Nb5+   8 c -0.00025(3) 0. 0.50696(9) 0.5  0 d
  Nb3   Nb5+   8 c -0.00027(3) 0.5 0.00588(9) 0.5  0 d
  Nb4   Nb5+   8 c 0.00030(3) 0.5 0.50579(9) 0.5  0 d
  Nb5   Nb5+   8 c 0.09005(2) 0.10861(5) 0.00505(6) 1.  0 d
  Nb6   Nb5+   8 c 0.09168(5) 0.10839(5) 0.50649(6) 1.  0 d
  Nb7   Nb5+   8 c 0.34177(2) 0.60823(5) 0.00510(6) 1.  0 d
  Nb8   Nb5+   8 c 0.34051(2) 0.60805(5) 0.50379(6) 1.  0 d
  Nb9   Nb5+   8 c 0.19595(2) 0.18336(4) 0.00609(6) 1.  0 d
  Nb10  Nb5+   8 c 0.19527(2) 0.18068(4) 0.50681(6) 1.  0 d
  Nb11  Nb5+   8 c 0.44570(2) 0.68216(5) 0.00245(6) 1.  0 d
  Nb12  Nb5+   8 c 0.44654(2) 0.68188(5) 0.50486(6) 1.  0 d
  Na1   Na1+   4 b 0.125 0.25 0.24961(70) 1.  0 d
  Na2   Na1+   4 b 0.125 0.25 0.75199(70) 1.  0 d
  Na3   Na1+   8 c 0.37485(3) 0.75052(7) 0.24563(100) 1.  0 d
  Ba1   Ba2+   8 c 0.00242(1) 0.17371(2) 0.25 1.  0 d
  Ba2   Ba2+   8 c -0.00513(1) 0.16921(2) 0.74843(10) 1.  0 d
  Ba3   Ba2+   8 c 0.16367(1) 0. 0.24639(12) 0.5  0 d
  Ba4   Ba2+   8 c 0.16378(1) 0. 0.74996(13) 0.5  0 d
  Ba5   Ba2+   8 c 0.41335(1) 0.5 0.24853(15) 0.5  0 d
  Ba6   Ba2+   8 c 0.41454(1) 0.5 0.74905(15) 0.5  0 d
  O1    O2-    8 c 0.0370(1) 0.0802(3) -0.0451(7) 1.  0 d
  O2    O2-    8 c 0.0372(2) 0.0838(4) 0.5050(5) 1.  0 d
  O3    O2-    8 c 0.2877(2) 0.5812(4) 0.0055(5) 1.  0 d
  O4    O2-    8 c 0.2880(1) 0.5809(3) 0.4546(7) 1.  0 d
  O5    O2-    8 c 0.1077(3) 0. -0.0098(8) 0.5  0 d
  O6    O2-    8 c 0.1069(2) 0. 0.4631(11) 0.5  0 d
  O7    O2-    8 c 0.3583(3) 0.5 -0.0165(10) 0.5  0 d
  O8    O2-    8 c 0.3583(3) 0.5 0.5001(8) 0.5  0 d
  O9    O2-    8 c 0.0002(1) 0.2834(4) -0.0319(7) 1.  0 d
  O10   O2-    8 c 0.0004(2) 0.2850(4) 0.5038(5) 1.  0 d
  O11   O2-    8 c 0.0723(1) 0.2141(4) -0.0451(9) 1.  0 d
  O12   O2-    8 c 0.0738(2) 0.2157(5) 0.4972(6) 1.  0 d
  O13   O2-    8 c 0.3218(2) 0.7140(6) -0.0128(6) 1.  0 d
  O14   O2-    8 c 0.3215(2) 0.7138(4) 0.4651(8) 1.  0 d
  O15   O2-    8 c 0.1080(1) 0.3546(4) 0.0091(6) 1.  0 d
  O16   O2-    8 c 0.1069(1) 0.3592(3) 0.4480(8) 1.  0 d
  O17   O2-    8 c 0.3570(2) 0.8537(5) 0.0062(7) 1.  0 d
  O18   O2-    8 c 0.3572(1) 0.8562(3) 0.4516(8) 1.  0 d
  O19   O2-    8 c 0.0410(2) 0.4247(5) -0.0037(5) 1.  0 d
  O20   O2-    8 c 0.0396(2) 0.4249(4) 0.4676(8) 1.  0 d
  O21   O2-    8 c 0.2907(1) 0.9247(3) -0.0348(7) 1.  0 d
  O22   O2-    8 c 0.2911(2) 0.9262(5) 0.4881(6) 1.  0 d
  O23   O2-    8 c 0.0836(1) 0.1146(3) 0.2329(10) 1.  0 d
  O24   O2-    8 c 0.3348(1) 0.6116(3) 0.7343(10) 1.  0 d
  O25   O2-    8 c 0.1003(1) 0.1053(3) 0.7329(9) 1.  0 d
  O26   O2-    8 c 0.3498(1) 0.6079(3) 0.2334(11) 1.  0 d
  O27   O2-    8 c 0.0513(1) 0.3028(3) 0.2310(9) 1.  0 d
  O28   O2-    8 c 0.2984(1) 0.8184(3) 0.2359(11) 1.  0 d
  O29   O2-    8 c 0.0598(1) 0.3302(3) 0.7331(9) 1.  0 d
  O30   O2-    8 c 0.3097(1) 0.8126(3) 0.7322(10) 1.  0 d
  O31   O2-    8 c 0.0085(1) 0. 0.2328(12) 0.5  0 d
  O32   O2-    8 c -0.0078(2) 0. 0.7347(15) 0.5  0 d
  O33   O2-    8 c 0.2548(2) 0. 0.2359(20) 0.5  0 d
  O34   O2-    8 c 0.2449(2) 0. 0.7356(15) 0.5  0 d
_refine_ls_R_factor_all            0.031
_cod_database_code 1001508
_journal_paper_doi 10.1088/0953-8984/2/1/002