The compound described by Cs8Ta6O19 crystallizes in the tetragonal I4/m space group. Cs(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms. There are five inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. In the second Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. In the third Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. In the fourth Ta site, Ta(2) is bonded in a 6-coordinate geometry to one O(2), one O(5), and four equivalent O(4) atoms. In the fifth Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Ta(2) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1) and two equivalent Ta(1) atoms. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one Ta(1), and one Ta(2) atom. In the fourth O site, O(5) is bonded in an octahedral geometry to two equivalent Ta(2) and four Ta(1,1,1) atoms. In the fifth O site, O(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Ta(1) atom. is represented by the CIF card [CIF]
data_Cs8Ta6O19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.940
_cell_length_b   9.940
_cell_length_c   9.940
_cell_angle_alpha   119.800
_cell_angle_beta   119.801
_cell_angle_gamma   90.347
_symmetry_Int_Tables_number   1
_cell_volume   696.459
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Cs  Cs0  1  0.434  0.067  0.799  1.0
  Cs  Cs1  1  0.067  0.267  0.632  1.0
  Cs  Cs2  1  0.635  0.434  0.368  1.0
  Cs  Cs3  1  0.267  0.635  0.201  1.0
  Cs  Cs4  1  0.566  0.933  0.201  1.0
  Cs  Cs5  1  0.933  0.733  0.368  1.0
  Cs  Cs6  1  0.365  0.566  0.632  1.0
  Cs  Cs7  1  0.733  0.365  0.799  1.0
  Ta  Ta8  1  0.214  0.105  0.319  1.0
  Ta  Ta9  1  0.105  0.786  0.891  1.0
  Ta  Ta10  1  0.895  0.214  0.109  1.0
  Ta  Ta11  1  0.786  0.895  0.681  1.0
  Ta  Ta12  1  0.833  0.833  0.000  1.0
  Ta  Ta13  1  0.167  0.167  1.000  1.0
  O  O14  1  0.370  0.199  0.569  1.0
  O  O15  1  0.199  0.630  0.829  1.0
  O  O16  1  0.801  0.370  0.171  1.0
  O  O17  1  0.630  0.801  0.431  1.0
  O  O18  1  0.703  0.703  1.000  1.0
  O  O19  1  0.297  0.297  0.000  1.0
  O  O20  1  0.261  0.914  0.175  1.0
  O  O21  1  0.914  0.739  0.653  1.0
  O  O22  1  0.086  0.261  0.347  1.0
  O  O23  1  0.739  0.086  0.825  1.0
  O  O24  1  0.316  0.229  0.265  1.0
  O  O25  1  0.229  0.964  0.913  1.0
  O  O26  1  0.051  0.316  0.087  1.0
  O  O27  1  0.964  0.051  0.735  1.0
  O  O28  1  0.684  0.771  0.735  1.0
  O  O29  1  0.771  0.036  0.087  1.0
  O  O30  1  0.949  0.684  0.913  1.0
  O  O31  1  0.036  0.949  0.265  1.0
  O  O32  1  0.000  0.000  0.000  1.0
[/CIF]
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The compound described by Cs8Ta6O19 crystallizes in the tetragonal I4/m space group. Cs(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms. There are five inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. In the second Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. In the third Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. In the fourth Ta site, Ta(2) is bonded in a 6-coordinate geometry to one O(2), one O(5), and four equivalent O(4) atoms. In the fifth Ta site, Ta(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Ta(2) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1) and two equivalent Ta(1) atoms. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one Ta(1), and one Ta(2) atom. In the fourth O site, O(5) is bonded in an octahedral geometry to two equivalent Ta(2) and four Ta(1,1,1) atoms. In the fifth O site, O(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Ta(1) atom. is represented by the CIF card [CIF]
data_Cs8Ta6O19
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.940
_cell_length_b   9.940
_cell_length_c   9.940
_cell_angle_alpha   119.800
_cell_angle_beta   119.801
_cell_angle_gamma   90.347
_symmetry_Int_Tables_number   1
_cell_volume   696.459
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Cs  Cs0  1  0.434  0.067  0.799  1.0
  Cs  Cs1  1  0.067  0.267  0.632  1.0
  Cs  Cs2  1  0.635  0.434  0.368  1.0
  Cs  Cs3  1  0.267  0.635  0.201  1.0
  Cs  Cs4  1  0.566  0.933  0.201  1.0
  Cs  Cs5  1  0.933  0.733  0.368  1.0
  Cs  Cs6  1  0.365  0.566  0.632  1.0
  Cs  Cs7  1  0.733  0.365  0.799  1.0
  Ta  Ta8  1  0.214  0.105  0.319  1.0
  Ta  Ta9  1  0.105  0.786  0.891  1.0
  Ta  Ta10  1  0.895  0.214  0.109  1.0
  Ta  Ta11  1  0.786  0.895  0.681  1.0
  Ta  Ta12  1  0.833  0.833  0.000  1.0
  Ta  Ta13  1  0.167  0.167  1.000  1.0
  O  O14  1  0.370  0.199  0.569  1.0
  O  O15  1  0.199  0.630  0.829  1.0
  O  O16  1  0.801  0.370  0.171  1.0
  O  O17  1  0.630  0.801  0.431  1.0
  O  O18  1  0.703  0.703  1.000  1.0
  O  O19  1  0.297  0.297  0.000  1.0
  O  O20  1  0.261  0.914  0.175  1.0
  O  O21  1  0.914  0.739  0.653  1.0
  O  O22  1  0.086  0.261  0.347  1.0
  O  O23  1  0.739  0.086  0.825  1.0
  O  O24  1  0.316  0.229  0.265  1.0
  O  O25  1  0.229  0.964  0.913  1.0
  O  O26  1  0.051  0.316  0.087  1.0
  O  O27  1  0.964  0.051  0.735  1.0
  O  O28  1  0.684  0.771  0.735  1.0
  O  O29  1  0.771  0.036  0.087  1.0
  O  O30  1  0.949  0.684  0.913  1.0
  O  O31  1  0.036  0.949  0.265  1.0
  O  O32  1  0.000  0.000  0.000  1.0
[/CIF]
.