#------------------------------------------------------------------------------
#$Date: 2016-02-18 17:37:37 +0200 (Thu, 18 Feb 2016) $
#$Revision: 176729 $
#$URL: svn://www.crystallography.net/cod/cif/1/00/10/1001030.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_1001030
loop_
_publ_author_name
'Michel, C'
'Groult, D'
'Chailleux, J M'
'Raveau, B'
_publ_section_title
;
Sur de nouveaux pyrochlores lacunaires riches en sodium Na₁₊ₐ Ta₁₊ₐ
W₁₋ₐ O₆ synthetises par echange carionique en phase solide
;
_journal_coden_ASTM              RVCMA8
_journal_name_full               'Revue de Chimie Minerale'
_journal_page_first              283
_journal_page_last               289
_journal_volume                  13
_journal_year                    1976
_chemical_formula_structural     'Na2 Ta2 O6'
_chemical_formula_sum            'Na2 O6 Ta2'
_chemical_name_systematic        'Disodium ditantalum oxide'
_space_group_IT_number           227
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-F 4vw 2vw 3'
_symmetry_space_group_name_H-M   'F d -3 m :2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   10.442(6)
_cell_length_b                   10.442(5)
_cell_length_c                   10.442(5)
_cell_volume                     1138.5
_exptl_crystal_density_meas      5.92
_refine_ls_R_factor_all          0.068
_cod_original_sg_symbol_H-M      'F d -3 m Z'
_cod_database_code               1001030
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,1/4-y,1/4-z
1/4-x,y,1/4-z
1/4-x,1/4-y,z
y,z,x
1/4-y,1/4-z,x
y,1/4-z,1/4-x
1/4-y,z,1/4-x
z,x,y
1/4-z,x,1/4-y
1/4-z,1/4-x,y
z,1/4-x,1/4-y
x,z,y
x,1/4-z,1/4-y
1/4-x,1/4-z,y
1/4-x,z,1/4-y
y,x,z
1/4-y,x,1/4-z
y,1/4-x,1/4-z
1/4-y,1/4-x,z
z,y,x
1/4-z,1/4-y,x
1/4-z,y,1/4-x
z,1/4-y,1/4-x
-x,-y,-z
-x,3/4+y,3/4+z
3/4+x,-y,3/4+z
3/4+x,3/4+y,-z
-y,-z,-x
3/4+y,3/4+z,-x
-y,3/4+z,3/4+x
3/4+y,-z,3/4+x
-z,-x,-y
3/4+z,-x,3/4+y
3/4+z,3/4+x,-y
-z,3/4+x,3/4+y
-x,-z,-y
-x,3/4+z,3/4+y
3/4+x,3/4+z,-y
3/4+x,-z,3/4+y
-y,-x,-z
3/4+y,-x,3/4+z
-y,3/4+x,3/4+z
3/4+y,3/4+x,-z
-z,-y,-x
3/4+z,3/4+y,-x
3/4+z,-y,3/4+x
-z,3/4+y,3/4+x
x,1/2+y,1/2+z
1/2+x,y,1/2+z
1/2+x,1/2+y,z
x,3/4-y,3/4-z
1/2+x,1/4-y,3/4-z
1/2+x,3/4-y,1/4-z
1/4-x,1/2+y,3/4-z
3/4-x,y,3/4-z
3/4-x,1/2+y,1/4-z
1/4-x,3/4-y,1/2+z
3/4-x,1/4-y,1/2+z
3/4-x,3/4-y,z
y,1/2+z,1/2+x
1/2+y,z,1/2+x
1/2+y,1/2+z,x
1/4-y,3/4-z,1/2+x
3/4-y,1/4-z,1/2+x
3/4-y,3/4-z,x
y,3/4-z,3/4-x
1/2+y,1/4-z,3/4-x
1/2+y,3/4-z,1/4-x
1/4-y,1/2+z,3/4-x
3/4-y,z,3/4-x
3/4-y,1/2+z,1/4-x
z,1/2+x,1/2+y
1/2+z,x,1/2+y
1/2+z,1/2+x,y
1/4-z,1/2+x,3/4-y
3/4-z,x,3/4-y
3/4-z,1/2+x,1/4-y
1/4-z,3/4-x,1/2+y
3/4-z,1/4-x,1/2+y
3/4-z,3/4-x,y
z,3/4-x,3/4-y
1/2+z,1/4-x,3/4-y
1/2+z,3/4-x,1/4-y
x,1/2+z,1/2+y
1/2+x,z,1/2+y
1/2+x,1/2+z,y
x,3/4-z,3/4-y
1/2+x,1/4-z,3/4-y
1/2+x,3/4-z,1/4-y
1/4-x,3/4-z,1/2+y
3/4-x,1/4-z,1/2+y
3/4-x,3/4-z,y
1/4-x,1/2+z,3/4-y
3/4-x,z,3/4-y
3/4-x,1/2+z,1/4-y
y,1/2+x,1/2+z
1/2+y,x,1/2+z
1/2+y,1/2+x,z
1/4-y,1/2+x,3/4-z
3/4-y,x,3/4-z
3/4-y,1/2+x,1/4-z
y,3/4-x,3/4-z
1/2+y,1/4-x,3/4-z
1/2+y,3/4-x,1/4-z
1/4-y,3/4-x,1/2+z
3/4-y,1/4-x,1/2+z
3/4-y,3/4-x,z
z,1/2+y,1/2+x
1/2+z,y,1/2+x
1/2+z,1/2+y,x
1/4-z,3/4-y,1/2+x
3/4-z,1/4-y,1/2+x
3/4-z,3/4-y,x
1/4-z,1/2+y,3/4-x
3/4-z,y,3/4-x
3/4-z,1/2+y,1/4-x
z,3/4-y,3/4-x
1/2+z,1/4-y,3/4-x
1/2+z,3/4-y,1/4-x
-x,1/2-y,1/2-z
1/2-x,-y,1/2-z
1/2-x,1/2-y,-z
-x,1/4+y,1/4+z
1/2-x,3/4+y,1/4+z
1/2-x,1/4+y,3/4+z
3/4+x,1/2-y,1/4+z
1/4+x,-y,1/4+z
1/4+x,1/2-y,3/4+z
3/4+x,1/4+y,1/2-z
1/4+x,3/4+y,1/2-z
1/4+x,1/4+y,-z
-y,1/2-z,1/2-x
1/2-y,-z,1/2-x
1/2-y,1/2-z,-x
3/4+y,1/4+z,1/2-x
1/4+y,3/4+z,1/2-x
1/4+y,1/4+z,-x
-y,1/4+z,1/4+x
1/2-y,3/4+z,1/4+x
1/2-y,1/4+z,3/4+x
3/4+y,1/2-z,1/4+x
1/4+y,-z,1/4+x
1/4+y,1/2-z,3/4+x
-z,1/2-x,1/2-y
1/2-z,-x,1/2-y
1/2-z,1/2-x,-y
3/4+z,1/2-x,1/4+y
1/4+z,-x,1/4+y
1/4+z,1/2-x,3/4+y
3/4+z,1/4+x,1/2-y
1/4+z,3/4+x,1/2-y
1/4+z,1/4+x,-y
-z,1/4+x,1/4+y
1/2-z,3/4+x,1/4+y
1/2-z,1/4+x,3/4+y
-x,1/2-z,1/2-y
1/2-x,-z,1/2-y
1/2-x,1/2-z,-y
-x,1/4+z,1/4+y
1/2-x,3/4+z,1/4+y
1/2-x,1/4+z,3/4+y
3/4+x,1/4+z,1/2-y
1/4+x,3/4+z,1/2-y
1/4+x,1/4+z,-y
3/4+x,1/2-z,1/4+y
1/4+x,-z,1/4+y
1/4+x,1/2-z,3/4+y
-y,1/2-x,1/2-z
1/2-y,-x,1/2-z
1/2-y,1/2-x,-z
3/4+y,1/2-x,1/4+z
1/4+y,-x,1/4+z
1/4+y,1/2-x,3/4+z
-y,1/4+x,1/4+z
1/2-y,3/4+x,1/4+z
1/2-y,1/4+x,3/4+z
3/4+y,1/4+x,1/2-z
1/4+y,3/4+x,1/2-z
1/4+y,1/4+x,-z
-z,1/2-y,1/2-x
1/2-z,-y,1/2-x
1/2-z,1/2-y,-x
3/4+z,1/4+y,1/2-x
1/4+z,3/4+y,1/2-x
1/4+z,1/4+y,-x
3/4+z,1/2-y,1/4+x
1/4+z,-y,1/4+x
1/4+z,1/2-y,3/4+x
-z,1/4+y,1/4+x
1/2-z,3/4+y,1/4+x
1/2-z,1/4+y,3/4+x
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
Na1 Na1+ 16 d 0.5 0.5 0.5 0.87 0 d
Ta1 Ta5+ 16 d 0.5 0.5 0.5 0.13 0 d
Na2 Na1+ 16 c 0. 0. 0. 0.13 0 d
Ta2 Ta5+ 16 c 0. 0. 0. 0.87 0 d
O1 O2- 48 f 0.322 0.125 0.125 0.913 0 d
O2 O2- 8 b 0.375 0.375 0.375 0.52 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
Na1+ 1.000
Ta5+ 5.000
O2- -2.000
