The material described by Sr2LaTa3O11 crystallizes in the orthorhombic Immm space group. Sr(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. La(1) is bonded to two equivalent O(3), two equivalent O(4), and eight equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with two equivalent La(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, faces with four equivalent Ta(1)O6 octahedra, and faces with four equivalent Ta(2)O6 octahedra. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with two equivalent Ta(2)O6 octahedra, and faces with two equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-19°. In the second Ta site, Ta(2) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with four equivalent Ta(1)O6 octahedra, and faces with four equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent La(1), one Ta(1), and one Ta(2) atom. In the second O site, O(2) is bonded to three equivalent Sr(1) and one Ta(1) atom to form a mixture of distorted corner and edge-sharing OSr3Ta tetrahedra. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent La(1) and two equivalent Ta(2) atoms. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent Ta(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaTa3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.460
_cell_length_b   11.460
_cell_length_c   11.460
_cell_angle_alpha   159.996
_cell_angle_beta   150.900
_cell_angle_gamma   35.566
_symmetry_Int_Tables_number   1
_cell_volume   250.132
_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
  Sr  Sr0  1  0.205  0.205  0.000  1.0
  Sr  Sr1  1  0.795  0.795  0.000  1.0
  La  La2  1  0.500  0.000  0.500  1.0
  Ta  Ta3  1  0.635  0.635  0.000  1.0
  Ta  Ta4  1  0.365  0.365  0.000  1.0
  Ta  Ta5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.323  0.559  0.764  1.0
  O  O7  1  0.796  0.559  0.236  1.0
  O  O8  1  0.068  0.305  0.762  1.0
  O  O9  1  0.457  0.695  0.762  1.0
  O  O10  1  0.677  0.441  0.236  1.0
  O  O11  1  0.204  0.441  0.764  1.0
  O  O12  1  0.000  0.000  0.000  1.0
  O  O13  1  0.620  0.120  0.500  1.0
  O  O14  1  0.380  0.880  0.500  1.0
  O  O15  1  0.932  0.695  0.238  1.0
  O  O16  1  0.543  0.305  0.238  1.0
[/CIF]
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The material described by Sr2LaTa3O11 crystallizes in the orthorhombic Immm space group. Sr(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. La(1) is bonded to two equivalent O(3), two equivalent O(4), and eight equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with two equivalent La(1)O12 cuboctahedra, faces with two equivalent La(1)O12 cuboctahedra, faces with four equivalent Ta(1)O6 octahedra, and faces with four equivalent Ta(2)O6 octahedra. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with two equivalent Ta(2)O6 octahedra, and faces with two equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-19°. In the second Ta site, Ta(2) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with four equivalent Ta(1)O6 octahedra, and faces with four equivalent La(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent La(1), one Ta(1), and one Ta(2) atom. In the second O site, O(2) is bonded to three equivalent Sr(1) and one Ta(1) atom to form a mixture of distorted corner and edge-sharing OSr3Ta tetrahedra. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent La(1) and two equivalent Ta(2) atoms. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent Ta(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2LaTa3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.460
_cell_length_b   11.460
_cell_length_c   11.460
_cell_angle_alpha   159.996
_cell_angle_beta   150.900
_cell_angle_gamma   35.566
_symmetry_Int_Tables_number   1
_cell_volume   250.132
_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
  Sr  Sr0  1  0.205  0.205  0.000  1.0
  Sr  Sr1  1  0.795  0.795  0.000  1.0
  La  La2  1  0.500  0.000  0.500  1.0
  Ta  Ta3  1  0.635  0.635  0.000  1.0
  Ta  Ta4  1  0.365  0.365  0.000  1.0
  Ta  Ta5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.323  0.559  0.764  1.0
  O  O7  1  0.796  0.559  0.236  1.0
  O  O8  1  0.068  0.305  0.762  1.0
  O  O9  1  0.457  0.695  0.762  1.0
  O  O10  1  0.677  0.441  0.236  1.0
  O  O11  1  0.204  0.441  0.764  1.0
  O  O12  1  0.000  0.000  0.000  1.0
  O  O13  1  0.620  0.120  0.500  1.0
  O  O14  1  0.380  0.880  0.500  1.0
  O  O15  1  0.932  0.695  0.238  1.0
  O  O16  1  0.543  0.305  0.238  1.0
[/CIF]
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