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#$Date: 2016-02-14 16:26:36 +0200 (Sun, 14 Feb 2016) $
#$Revision: 176435 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/00/13/1001383.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_1001383
loop_
_publ_author_name
'Nedjar, R'
'Borel, M M'
'Leclaire, A'
'Raveau, B'
_publ_section_title
;
Ba (Nb~3~ O~8~)~2~ * (H~2~ O): A novel lamellar niobate
;
_journal_coden_ASTM              MRBUAC
_journal_name_full               'Materials Research Bulletin'
_journal_page_first              495
_journal_page_last               500
_journal_volume                  23
_journal_year                    1988
_chemical_formula_structural     'Ba (Nb3 O8)2 (H2 O)'
_chemical_formula_sum            'Ba H2 Nb6 O17'
_chemical_name_systematic        'Barium bistriniobate hydrate'
_space_group_IT_number           71
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      71
_symmetry_space_group_name_Hall  '-I 2 2'
_symmetry_space_group_name_H-M   'I m m m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.62(2)
_cell_length_b                   21.61(4)
_cell_length_c                   3.811(4)
_cell_volume                     709.9
_refine_ls_R_factor_all          0.07
_cod_original_formula_sum        'H2 Ba Nb6 O17'
_cod_database_code               1001383
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,-y,-z
-x,y,-z
-x,-y,z
-x,-y,-z
-x,y,z
x,-y,z
x,y,-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-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
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 n 0.186(3) 0.368(2) 0. 1. 0 d
Nb2 Nb5+ 4 h 0.5 0.232(2) 0. 1. 0 d
Ba1 Ba2+ 2 a 0. 0. 0. 1. 0 d
O1 O2- 8 n 0.15(1) 0.36(1) 0.5 1. 0 d
O2 O2- 8 n 0.34(1) 0.43(1) 0. 1. 0 d
O3 O2- 8 n 0.34(1) 0.30(1) 0. 1. 0 d
O4 O2- 4 g 0. 0.29(1) 0. 1. 0 d
O5 O2- 4 g 0. 0.43(1) 0. 1. 0 d
O6 O2- 2 b 0. 0.5 0.5 1. 2 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
Nb5+ 5.000
Ba2+ 2.000
O2- -2.000
H1+ 1.000