The crystal structure described by Ta11O2 crystallizes in the triclinic P1 space group. There are twenty-two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Ta(20) and one O(4) atom. In the second Ta site, Ta(2) is bonded in a 1-coordinate geometry to one Ta(10), one Ta(16), and one Ta(21) atom. In the third Ta site, Ta(3) is bonded in a 4-coordinate geometry to one Ta(22), one Ta(6), one O(2), and one O(4) atom. In the fourth Ta site, Ta(4) is bonded in a distorted single-bond geometry to one Ta(10), one Ta(15), one Ta(5), and one O(1) atom. In the fifth Ta site, Ta(5) is bonded in a 3-coordinate geometry to one Ta(19), one Ta(4), one Ta(8), and one O(1) atom. In the sixth Ta site, Ta(6) is bonded in a 2-coordinate geometry to one Ta(16), one Ta(3), and one O(1) atom. In the seventh Ta site, Ta(7) is bonded in a 2-coordinate geometry to one Ta(10), one Ta(15), one Ta(17), and one Ta(21) atom. In the eighth Ta site, Ta(8) is bonded in a distorted single-bond geometry to one Ta(5), one Ta(9), and one O(4) atom. In the ninth Ta site, Ta(9) is bonded in a 3-coordinate geometry to one Ta(19), one Ta(20), and one Ta(8) atom. In the tenth Ta site, Ta(10) is bonded in a 4-coordinate geometry to one Ta(19), one Ta(2), one Ta(4), and one Ta(7) atom. In the eleventh Ta site, Ta(11) is bonded in a single-bond geometry to one O(1) and one O(3) atom. In the twelfth Ta site, Ta(12) is bonded in a distorted single-bond geometry to one Ta(21) and one O(3) atom. In the thirteenth Ta site, Ta(13) is bonded in a distorted single-bond geometry to one O(3) atom. In the fourteenth Ta site, Ta(14) is bonded in a distorted single-bond geometry to one Ta(20) and one O(3) atom. In the fifteenth Ta site, Ta(15) is bonded in a 5-coordinate geometry to one Ta(18), one Ta(20), one Ta(4), one Ta(7), and one O(2) atom. In the sixteenth Ta site, Ta(16) is bonded in a distorted rectangular see-saw-like geometry to one Ta(18), one Ta(19), one Ta(2), and one Ta(6) atom. In the seventeenth Ta site, Ta(17) is bonded in a distorted water-like geometry to one Ta(7) and one O(1) atom. In the eighteenth Ta site, Ta(18) is bonded in a 3-coordinate geometry to one Ta(15), one Ta(16), and one O(2) atom. In the nineteenth Ta site, Ta(19) is bonded in a 4-coordinate geometry to one Ta(10), one Ta(16), one Ta(5), and one Ta(9) atom. In the twentieth Ta site, Ta(20) is bonded in a 5-coordinate geometry to one Ta(1), one Ta(14), one Ta(15), one Ta(9), and one O(2) atom. In the twenty-first Ta site, Ta(21) is bonded in a 4-coordinate geometry to one Ta(12), one Ta(2), one Ta(22), and one Ta(7) atom. In the twenty-second Ta site, Ta(22) is bonded in a single-bond geometry to one Ta(21), one Ta(3), one O(2), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ta(11), one Ta(17), one Ta(4), one Ta(5), and one Ta(6) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ta(15), one Ta(18), one Ta(20), one Ta(22), and one Ta(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ta(11), one Ta(12), one Ta(13), and one Ta(14) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ta(1), one Ta(22), one Ta(3), and one Ta(8) atom. is represented by the CIF card [CIF]
data_Ta11O2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.488
_cell_length_b   7.533
_cell_length_c   9.321
_cell_angle_alpha   110.032
_cell_angle_beta   107.199
_cell_angle_gamma   101.884
_symmetry_Int_Tables_number   1
_cell_volume   443.346
_cell_formula_units_Z   2
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
  Ta  Ta0  1  0.974  0.329  0.648  1.0
  Ta  Ta1  1  0.601  0.791  0.422  1.0
  Ta  Ta2  1  0.733  0.595  0.605  1.0
  Ta  Ta3  1  0.222  0.094  0.109  1.0
  Ta  Ta4  1  0.158  0.173  0.277  1.0
  Ta  Ta5  1  0.681  0.698  0.760  1.0
  Ta  Ta6  1  0.492  0.854  0.102  1.0
  Ta  Ta7  1  0.060  0.263  0.444  1.0
  Ta  Ta8  1  0.248  0.140  0.601  1.0
  Ta  Ta9  1  0.405  0.925  0.278  1.0
  Ta  Ta10  1  0.816  0.516  0.918  1.0
  Ta  Ta11  1  0.729  0.538  0.116  1.0
  Ta  Ta12  1  0.915  0.431  0.266  1.0
  Ta  Ta13  1  0.088  0.311  0.947  1.0
  Ta  Ta14  1  0.326  0.023  0.941  1.0
  Ta  Ta15  1  0.463  0.830  0.612  1.0
  Ta  Ta16  1  0.540  0.725  0.956  1.0
  Ta  Ta17  1  0.397  0.927  0.778  1.0
  Ta  Ta18  1  0.292  0.991  0.459  1.0
  Ta  Ta19  1  0.149  0.182  0.781  1.0
  Ta  Ta20  1  0.653  0.670  0.271  1.0
  Ta  Ta21  1  0.813  0.525  0.426  1.0
  O  O22  1  0.906  0.934  0.023  1.0
  O  O23  1  0.057  0.729  0.694  1.0
  O  O24  1  0.903  0.419  0.034  1.0
  O  O25  1  0.907  0.423  0.532  1.0
[/CIF]
.
The crystal structure described by Ta11O2 crystallizes in the triclinic P1 space group. There are twenty-two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Ta(20) and one O(4) atom. In the second Ta site, Ta(2) is bonded in a 1-coordinate geometry to one Ta(10), one Ta(16), and one Ta(21) atom. In the third Ta site, Ta(3) is bonded in a 4-coordinate geometry to one Ta(22), one Ta(6), one O(2), and one O(4) atom. In the fourth Ta site, Ta(4) is bonded in a distorted single-bond geometry to one Ta(10), one Ta(15), one Ta(5), and one O(1) atom. In the fifth Ta site, Ta(5) is bonded in a 3-coordinate geometry to one Ta(19), one Ta(4), one Ta(8), and one O(1) atom. In the sixth Ta site, Ta(6) is bonded in a 2-coordinate geometry to one Ta(16), one Ta(3), and one O(1) atom. In the seventh Ta site, Ta(7) is bonded in a 2-coordinate geometry to one Ta(10), one Ta(15), one Ta(17), and one Ta(21) atom. In the eighth Ta site, Ta(8) is bonded in a distorted single-bond geometry to one Ta(5), one Ta(9), and one O(4) atom. In the ninth Ta site, Ta(9) is bonded in a 3-coordinate geometry to one Ta(19), one Ta(20), and one Ta(8) atom. In the tenth Ta site, Ta(10) is bonded in a 4-coordinate geometry to one Ta(19), one Ta(2), one Ta(4), and one Ta(7) atom. In the eleventh Ta site, Ta(11) is bonded in a single-bond geometry to one O(1) and one O(3) atom. In the twelfth Ta site, Ta(12) is bonded in a distorted single-bond geometry to one Ta(21) and one O(3) atom. In the thirteenth Ta site, Ta(13) is bonded in a distorted single-bond geometry to one O(3) atom. In the fourteenth Ta site, Ta(14) is bonded in a distorted single-bond geometry to one Ta(20) and one O(3) atom. In the fifteenth Ta site, Ta(15) is bonded in a 5-coordinate geometry to one Ta(18), one Ta(20), one Ta(4), one Ta(7), and one O(2) atom. In the sixteenth Ta site, Ta(16) is bonded in a distorted rectangular see-saw-like geometry to one Ta(18), one Ta(19), one Ta(2), and one Ta(6) atom. In the seventeenth Ta site, Ta(17) is bonded in a distorted water-like geometry to one Ta(7) and one O(1) atom. In the eighteenth Ta site, Ta(18) is bonded in a 3-coordinate geometry to one Ta(15), one Ta(16), and one O(2) atom. In the nineteenth Ta site, Ta(19) is bonded in a 4-coordinate geometry to one Ta(10), one Ta(16), one Ta(5), and one Ta(9) atom. In the twentieth Ta site, Ta(20) is bonded in a 5-coordinate geometry to one Ta(1), one Ta(14), one Ta(15), one Ta(9), and one O(2) atom. In the twenty-first Ta site, Ta(21) is bonded in a 4-coordinate geometry to one Ta(12), one Ta(2), one Ta(22), and one Ta(7) atom. In the twenty-second Ta site, Ta(22) is bonded in a single-bond geometry to one Ta(21), one Ta(3), one O(2), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ta(11), one Ta(17), one Ta(4), one Ta(5), and one Ta(6) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ta(15), one Ta(18), one Ta(20), one Ta(22), and one Ta(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ta(11), one Ta(12), one Ta(13), and one Ta(14) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ta(1), one Ta(22), one Ta(3), and one Ta(8) atom. is represented by the CIF card [CIF]
data_Ta11O2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.488
_cell_length_b   7.533
_cell_length_c   9.321
_cell_angle_alpha   110.032
_cell_angle_beta   107.199
_cell_angle_gamma   101.884
_symmetry_Int_Tables_number   1
_cell_volume   443.346
_cell_formula_units_Z   2
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
  Ta  Ta0  1  0.974  0.329  0.648  1.0
  Ta  Ta1  1  0.601  0.791  0.422  1.0
  Ta  Ta2  1  0.733  0.595  0.605  1.0
  Ta  Ta3  1  0.222  0.094  0.109  1.0
  Ta  Ta4  1  0.158  0.173  0.277  1.0
  Ta  Ta5  1  0.681  0.698  0.760  1.0
  Ta  Ta6  1  0.492  0.854  0.102  1.0
  Ta  Ta7  1  0.060  0.263  0.444  1.0
  Ta  Ta8  1  0.248  0.140  0.601  1.0
  Ta  Ta9  1  0.405  0.925  0.278  1.0
  Ta  Ta10  1  0.816  0.516  0.918  1.0
  Ta  Ta11  1  0.729  0.538  0.116  1.0
  Ta  Ta12  1  0.915  0.431  0.266  1.0
  Ta  Ta13  1  0.088  0.311  0.947  1.0
  Ta  Ta14  1  0.326  0.023  0.941  1.0
  Ta  Ta15  1  0.463  0.830  0.612  1.0
  Ta  Ta16  1  0.540  0.725  0.956  1.0
  Ta  Ta17  1  0.397  0.927  0.778  1.0
  Ta  Ta18  1  0.292  0.991  0.459  1.0
  Ta  Ta19  1  0.149  0.182  0.781  1.0
  Ta  Ta20  1  0.653  0.670  0.271  1.0
  Ta  Ta21  1  0.813  0.525  0.426  1.0
  O  O22  1  0.906  0.934  0.023  1.0
  O  O23  1  0.057  0.729  0.694  1.0
  O  O24  1  0.903  0.419  0.034  1.0
  O  O25  1  0.907  0.423  0.532  1.0
[/CIF]
.