The structure described by La3Ti2TaO11 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the orthorhombic Pmc2_1 space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(4), one O(6), one O(8), two equivalent O(1), two equivalent O(3), and two equivalent O(7) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(1), one O(7), one O(9), two equivalent O(2), two equivalent O(4), and two equivalent O(8) atoms. In the third La site, La(3) is bonded in a 7-coordinate geometry to one O(9), two equivalent O(10), two equivalent O(11), and two equivalent O(5) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(11), one O(2), one O(4), one O(8), and two equivalent O(9) atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 17-37°. In the second Ti site, Ti(2) is bonded to one O(11), one O(2), two equivalent O(10), and two equivalent O(5) atoms to form distorted corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 17-37°. Ta(1) is bonded to one O(1), one O(7), two equivalent O(3), and two equivalent O(6) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 11-38°. There are eleven inequivalent O sites. In the first O site, O(11) is bonded to two equivalent La(3), one Ti(1), and one Ti(2) atom to form distorted OLa2Ti2 tetrahedra that share  a cornercorner with one O(8)La3Ti tetrahedra and corners with two equivalent O(11)La2Ti2 tetrahedra. In the second O site, O(1) is bonded to one La(2), two equivalent La(1), and one Ta(1) atom to form OLa3Ta tetrahedra that share corners with two equivalent O(1)La3Ta tetrahedra and corners with four equivalent O(8)La3Ti tetrahedra. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent La(2), one Ti(1), and one Ti(2) atom. In the fourth O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent La(1) and two equivalent Ta(1) atoms. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(2), and one Ti(1) atom. In the sixth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent La(3) and two equivalent Ti(2) atoms. In the seventh O site, O(6) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent Ta(1) atoms. In the eighth O site, O(7) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), and one Ta(1) atom. In the ninth O site, O(8) is bonded to one La(1), two equivalent La(2), and one Ti(1) atom to form OLa3Ti tetrahedra that share  a cornercorner with one O(11)La2Ti2 tetrahedra, corners with two equivalent O(8)La3Ti tetrahedra, and corners with four equivalent O(1)La3Ta tetrahedra. In the tenth O site, O(9) is bonded in a 4-coordinate geometry to one La(2), one La(3), and two equivalent Ti(1) atoms. In the eleventh O site, O(10) is bonded in a 2-coordinate geometry to two equivalent La(3) and two equivalent Ti(2) atoms. is represented by the CIF file [CIF]
data_La3TaTi2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.958
_cell_length_b   5.625
_cell_length_c   20.413
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   454.535
_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
  La  La0  1  0.500  0.186  0.127  1.0
  La  La1  1  0.500  0.686  0.873  1.0
  La  La2  1  0.000  0.692  0.240  1.0
  La  La3  1  0.000  0.192  0.760  1.0
  La  La4  1  0.000  0.722  0.566  1.0
  La  La5  1  0.000  0.222  0.434  1.0
  Ta  Ta6  1  0.000  0.732  0.063  1.0
  Ta  Ta7  1  0.000  0.232  0.937  1.0
  Ti  Ti8  1  0.500  0.729  0.705  1.0
  Ti  Ti9  1  0.500  0.229  0.295  1.0
  Ti  Ti10  1  0.500  0.731  0.423  1.0
  Ti  Ti11  1  0.500  0.231  0.577  1.0
  O  O12  1  0.000  0.943  0.145  1.0
  O  O13  1  0.000  0.443  0.855  1.0
  O  O14  1  0.500  0.560  0.350  1.0
  O  O15  1  0.500  0.060  0.650  1.0
  O  O16  1  0.000  0.071  0.021  1.0
  O  O17  1  0.000  0.571  0.979  1.0
  O  O18  1  0.500  0.966  0.242  1.0
  O  O19  1  0.500  0.466  0.758  1.0
  O  O20  1  0.500  0.962  0.517  1.0
  O  O21  1  0.500  0.462  0.483  1.0
  O  O22  1  0.500  0.765  0.066  1.0
  O  O23  1  0.500  0.265  0.934  1.0
  O  O24  1  0.000  0.463  0.121  1.0
  O  O25  1  0.000  0.963  0.879  1.0
  O  O26  1  0.500  0.446  0.222  1.0
  O  O27  1  0.500  0.946  0.778  1.0
  O  O28  1  0.000  0.263  0.306  1.0
  O  O29  1  0.000  0.763  0.694  1.0
  O  O30  1  0.000  0.764  0.438  1.0
  O  O31  1  0.000  0.264  0.562  1.0
  O  O32  1  0.500  0.557  0.618  1.0
  O  O33  1  0.500  0.057  0.382  1.0
[/CIF]
.
The structure described by La3Ti2TaO11 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the orthorhombic Pmc2_1 space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(4), one O(6), one O(8), two equivalent O(1), two equivalent O(3), and two equivalent O(7) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(1), one O(7), one O(9), two equivalent O(2), two equivalent O(4), and two equivalent O(8) atoms. In the third La site, La(3) is bonded in a 7-coordinate geometry to one O(9), two equivalent O(10), two equivalent O(11), and two equivalent O(5) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(11), one O(2), one O(4), one O(8), and two equivalent O(9) atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 17-37°. In the second Ti site, Ti(2) is bonded to one O(11), one O(2), two equivalent O(10), and two equivalent O(5) atoms to form distorted corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 17-37°. Ta(1) is bonded to one O(1), one O(7), two equivalent O(3), and two equivalent O(6) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 11-38°. There are eleven inequivalent O sites. In the first O site, O(11) is bonded to two equivalent La(3), one Ti(1), and one Ti(2) atom to form distorted OLa2Ti2 tetrahedra that share  a cornercorner with one O(8)La3Ti tetrahedra and corners with two equivalent O(11)La2Ti2 tetrahedra. In the second O site, O(1) is bonded to one La(2), two equivalent La(1), and one Ta(1) atom to form OLa3Ta tetrahedra that share corners with two equivalent O(1)La3Ta tetrahedra and corners with four equivalent O(8)La3Ti tetrahedra. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent La(2), one Ti(1), and one Ti(2) atom. In the fourth O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent La(1) and two equivalent Ta(1) atoms. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(2), and one Ti(1) atom. In the sixth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent La(3) and two equivalent Ti(2) atoms. In the seventh O site, O(6) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent Ta(1) atoms. In the eighth O site, O(7) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), and one Ta(1) atom. In the ninth O site, O(8) is bonded to one La(1), two equivalent La(2), and one Ti(1) atom to form OLa3Ti tetrahedra that share  a cornercorner with one O(11)La2Ti2 tetrahedra, corners with two equivalent O(8)La3Ti tetrahedra, and corners with four equivalent O(1)La3Ta tetrahedra. In the tenth O site, O(9) is bonded in a 4-coordinate geometry to one La(2), one La(3), and two equivalent Ti(1) atoms. In the eleventh O site, O(10) is bonded in a 2-coordinate geometry to two equivalent La(3) and two equivalent Ti(2) atoms. is represented by the CIF file [CIF]
data_La3TaTi2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.958
_cell_length_b   5.625
_cell_length_c   20.413
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   454.535
_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
  La  La0  1  0.500  0.186  0.127  1.0
  La  La1  1  0.500  0.686  0.873  1.0
  La  La2  1  0.000  0.692  0.240  1.0
  La  La3  1  0.000  0.192  0.760  1.0
  La  La4  1  0.000  0.722  0.566  1.0
  La  La5  1  0.000  0.222  0.434  1.0
  Ta  Ta6  1  0.000  0.732  0.063  1.0
  Ta  Ta7  1  0.000  0.232  0.937  1.0
  Ti  Ti8  1  0.500  0.729  0.705  1.0
  Ti  Ti9  1  0.500  0.229  0.295  1.0
  Ti  Ti10  1  0.500  0.731  0.423  1.0
  Ti  Ti11  1  0.500  0.231  0.577  1.0
  O  O12  1  0.000  0.943  0.145  1.0
  O  O13  1  0.000  0.443  0.855  1.0
  O  O14  1  0.500  0.560  0.350  1.0
  O  O15  1  0.500  0.060  0.650  1.0
  O  O16  1  0.000  0.071  0.021  1.0
  O  O17  1  0.000  0.571  0.979  1.0
  O  O18  1  0.500  0.966  0.242  1.0
  O  O19  1  0.500  0.466  0.758  1.0
  O  O20  1  0.500  0.962  0.517  1.0
  O  O21  1  0.500  0.462  0.483  1.0
  O  O22  1  0.500  0.765  0.066  1.0
  O  O23  1  0.500  0.265  0.934  1.0
  O  O24  1  0.000  0.463  0.121  1.0
  O  O25  1  0.000  0.963  0.879  1.0
  O  O26  1  0.500  0.446  0.222  1.0
  O  O27  1  0.500  0.946  0.778  1.0
  O  O28  1  0.000  0.263  0.306  1.0
  O  O29  1  0.000  0.763  0.694  1.0
  O  O30  1  0.000  0.764  0.438  1.0
  O  O31  1  0.000  0.264  0.562  1.0
  O  O32  1  0.500  0.557  0.618  1.0
  O  O33  1  0.500  0.057  0.382  1.0
[/CIF]
.