#------------------------------------------------------------------------------
#$Date: 2008-01-26 13:05:32 +0000 (Sat, 26 Jan 2008) $
#$Revision: 19 $
#$URL: svn://www.crystallography.net/cod/cif/2/2002720.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_2002720
_chemical_name_systematic
;
Tantalum titanium samarium oxide (0.66/1.34/2/7)
;
_chemical_formula_structural       '(Ta0.33 Ti0.67)2 Sm2 O7'
_chemical_formula_sum              'O7 Sm2 Ta.66 Ti1.34'
_publ_section_title
;
Synthese eines Pyrochlors mit Ti(II): (Ta0.67 Ti0.33)2 Sm2 O7
;
loop_
_publ_author_name
  'Peters, E'
  'Mueller-Buschbaum, Hk'
_journal_name_full
;
Zeitschrift fuer Naturforschung, Teil B. Anorganische Chemie,
Organische Chemie (42,1987-)
;
_journal_volume                    50
_journal_year                      1995
_journal_page_first                1340
_journal_page_last                 1342
_cell_length_a                     10.385(2)
_cell_length_b                     10.385(2)
_cell_length_c                     10.385(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       1120.0
_cell_formula_units_Z              8
_symmetry_space_group_name_H-M     'F d -3 m Z'
_symmetry_Int_Tables_number        227
_symmetry_cell_setting             cubic
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_type_symbol
_atom_type_oxidation_number
  Ta5+   5.000
  Ti4+   3.510
  Sm3+   3.000
  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
  Ta1   Ta5+  16 c 0. 0. 0. 0.33  0 d
  Ti1   Ti4+  16 c 0. 0. 0. 0.67  0 d
  Sm1   Sm3+  16 d 0.5 0.5 0.5 1.  0 d
  O1    O2-    8 b 0.375 0.375 0.375 1.  0 d
  O2    O2-   48 f 0.3231(8) 0.125 0.125 1.  0 d
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_22
_atom_site_aniso_U_23
_atom_site_aniso_U_33
  Ta1   0.0122(4) -0.0002(2) -0.0002(2) 0.0122(4) -0.0002(2) 0.0122(4)
  Ti1   0.0122(4) -0.0002(2) -0.0002(2) 0.0122(4) -0.0002(2) 0.0122(4)
  Sm1   0.0192(5) -0.0024(3) -0.0024(3) 0.0192(5) -0.0024(3) 0.0192(5)
  O1    0.024(6) 0. 0. 0.024(6) 0. 0.024(6)
  O2    0.010(5) 0. 0. 0.010(3) .000(4) 0.010(3)
_refine_ls_R_factor_all            0.048