#------------------------------------------------------------------------------
#$Date: 2015-01-27 21:58:39 +0200 (Tue, 27 Jan 2015) $
#$Revision: 130149 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/27/2002790.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_2002790
loop_
_publ_author_name
'Mueller-Buschbaum, Hk'
'Wedel, B'
_publ_section_title
;
Zur Kristallchemie der Barium-Oxometallat-Tellurite: Ba2 Te2 M6 O21 (M
= Niob und Tantal )
;
_journal_name_full
;
Zeitschrift fuer Naturforschung, Teil B. Anorganische Chemie,
Organische Chemie (42,1987-)
;
_journal_page_first              1411
_journal_page_last               1414
_journal_volume                  51
_journal_year                    1996
_chemical_formula_structural     'Ba2 (Nb6 Te2 O21)'
_chemical_formula_sum            'Ba2 Nb6 O21 Te2'
_chemical_name_systematic        'Dibarium hexanioboditellurate(IV)'
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      12
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 96.92(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   16.69899(300)
_cell_length_b                   5.671(2)
_cell_length_c                   9.611(2)
_cell_volume                     903.5
_refine_ls_R_factor_all          0.0491
_cod_database_code               2002790
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,-y,z
-x,-y,-z
-x,y,-z
1/2+x,1/2+y,z
1/2+x,1/2-y,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
Ba1 Ba2+ 4 i 0.138570(3) 0. 0.523080(5) 1. 0 d
Te1 Te4+ 4 i 0.275630(3) 0. 0.246390(5) 1. 0 d
Nb1 Nb5+ 4 i 0.401670(4) -0.5 0.083320(8) 1. 0 d
Nb2 Nb5+ 4 i 0.519850(4) 0. -0.336630(7) 1. 0 d
Nb3 Nb5+ 4 i 0.323810(4) 0. -0.170680(7) 1. 0 d
O1 O2- 4 h 0.5 0.22205(11) -0.5 1. 0 d
O2 O2- 4 i 0.35869(4) 0. 0.39617(7) 1. 0 d
O3 O2- 8 j 0.21959(3) 0.2430(1) 0.32904(5) 1. 0 d
O4 O2- 8 j 0.35579(3) 0.25148(10) -0.05474(5) 1. 0 d
O5 O2- 8 j 0.56672(3) -0.25945(10) -0.22016(5) 1. 0 d
O6 O2- 2 a 0.5 -0.5 0. 1. 0 d
O7 O2- 4 i 0.20958(4) 0. -0.14595(8) 1. 0 d
O8 O2- 4 i 0.41821(4) 0. -0.28166(8) 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
Ba2+ 2.000
Te4+ 4.000
Nb5+ 5.000
O2- -2.000
