The crystal structure described by Li2Ta2O3 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(5) atom. In the second Li site, Li(2) is bonded in a bent 120 degrees geometry to one O(4) and one O(6) atom. In the third Li site, Li(3) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. In the fourth Li site, Li(4) is bonded in a 3-coordinate geometry to one O(2), one O(5), and one O(6) atom. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a T-shaped geometry to one O(2), one O(3), and one O(5) atom. In the second Ta site, Ta(2) is bonded in a T-shaped geometry to one O(1), one O(2), and one O(3) atom. In the third Ta site, Ta(3) is bonded in a T-shaped geometry to one O(1), one O(4), and one O(6) atom. In the fourth Ta site, Ta(4) is bonded in a T-shaped geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(3), one Ta(2), and one Ta(3) atom. In the second O site, O(2) is bonded to one Li(1), one Li(4), one Ta(1), and one Ta(2) atom to form corner-sharing OLi2Ta2 trigonal pyramids. In the third O site, O(3) is bonded to one Li(1), one Li(3), one Ta(1), and one Ta(2) atom to form corner-sharing OLi2Ta2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Ta(3), and one Ta(4) atom to form distorted corner-sharing OLi2Ta2 trigonal pyramids. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(4), one Ta(1), and one Ta(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Li(2), one Li(4), one Ta(3), and one Ta(4) atom. is represented by the CIF file [CIF]
data_Li2Ta2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.875
_cell_length_b   4.973
_cell_length_c   8.558
_cell_angle_alpha   83.227
_cell_angle_beta   83.248
_cell_angle_gamma   67.125
_symmetry_Int_Tables_number   1
_cell_volume   189.218
_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
  Li  Li0  1  0.589  0.659  0.121  1.0
  Li  Li1  1  0.120  0.122  0.626  1.0
  Li  Li2  1  0.838  0.853  0.385  1.0
  Li  Li3  1  0.374  0.399  0.863  1.0
  Ta  Ta4  1  0.961  0.982  0.985  1.0
  Ta  Ta5  1  0.265  0.287  0.250  1.0
  Ta  Ta6  1  0.481  0.453  0.480  1.0
  Ta  Ta7  1  0.772  0.766  0.765  1.0
  O  O8  1  0.849  0.440  0.341  1.0
  O  O9  1  0.229  0.579  0.072  1.0
  O  O10  1  0.672  0.012  0.173  1.0
  O  O11  1  0.726  0.099  0.606  1.0
  O  O12  1  0.806  0.392  0.896  1.0
  O  O13  1  0.128  0.524  0.626  1.0
[/CIF]
.
The crystal structure described by Li2Ta2O3 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(5) atom. In the second Li site, Li(2) is bonded in a bent 120 degrees geometry to one O(4) and one O(6) atom. In the third Li site, Li(3) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(4) atom. In the fourth Li site, Li(4) is bonded in a 3-coordinate geometry to one O(2), one O(5), and one O(6) atom. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a T-shaped geometry to one O(2), one O(3), and one O(5) atom. In the second Ta site, Ta(2) is bonded in a T-shaped geometry to one O(1), one O(2), and one O(3) atom. In the third Ta site, Ta(3) is bonded in a T-shaped geometry to one O(1), one O(4), and one O(6) atom. In the fourth Ta site, Ta(4) is bonded in a T-shaped geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(3), one Ta(2), and one Ta(3) atom. In the second O site, O(2) is bonded to one Li(1), one Li(4), one Ta(1), and one Ta(2) atom to form corner-sharing OLi2Ta2 trigonal pyramids. In the third O site, O(3) is bonded to one Li(1), one Li(3), one Ta(1), and one Ta(2) atom to form corner-sharing OLi2Ta2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Ta(3), and one Ta(4) atom to form distorted corner-sharing OLi2Ta2 trigonal pyramids. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(4), one Ta(1), and one Ta(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Li(2), one Li(4), one Ta(3), and one Ta(4) atom. is represented by the CIF file [CIF]
data_Li2Ta2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.875
_cell_length_b   4.973
_cell_length_c   8.558
_cell_angle_alpha   83.227
_cell_angle_beta   83.248
_cell_angle_gamma   67.125
_symmetry_Int_Tables_number   1
_cell_volume   189.218
_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
  Li  Li0  1  0.589  0.659  0.121  1.0
  Li  Li1  1  0.120  0.122  0.626  1.0
  Li  Li2  1  0.838  0.853  0.385  1.0
  Li  Li3  1  0.374  0.399  0.863  1.0
  Ta  Ta4  1  0.961  0.982  0.985  1.0
  Ta  Ta5  1  0.265  0.287  0.250  1.0
  Ta  Ta6  1  0.481  0.453  0.480  1.0
  Ta  Ta7  1  0.772  0.766  0.765  1.0
  O  O8  1  0.849  0.440  0.341  1.0
  O  O9  1  0.229  0.579  0.072  1.0
  O  O10  1  0.672  0.012  0.173  1.0
  O  O11  1  0.726  0.099  0.606  1.0
  O  O12  1  0.806  0.392  0.896  1.0
  O  O13  1  0.128  0.524  0.626  1.0
[/CIF]
.