The structure described by LiSr4Sm2Ta2O12 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. Li(1) is bonded to one O(1), one O(3), one O(6), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  an edgeedge with one Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-64°. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(6), one O(7), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(2), one O(4), one O(5), one O(6), and one O(8) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(2), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(7), and one O(8) atom to form SmO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and  a cornercorner with one Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 26-38°. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one O(10), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form TaO6 octahedra that share corners with two equivalent Sm(1)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-38°. In the second Ta site, Ta(2) is bonded to one O(11), one O(12), one O(3), one O(4), one O(7), and one O(8) atom to form TaO6 octahedra that share corners with four equivalent Sm(1)O6 octahedra and  a cornercorner with one Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 26-32°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Sr(1), one Sr(3), one Sm(1), and one Ta(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Sm(1), and one Ta(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Li(1), one Sr(1), one Sr(3), one Sm(2), and one Ta(2) atom. In the fourth O site, O(4) is bonded to one Sr(2), one Sr(4), one Sm(2), and one Ta(2) atom to form distorted corner-sharing OSr2SmTa tetrahedra. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sm(2), and one Ta(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Li(1), one Sr(1), one Sr(2), one Sr(4), one Sm(2), and one Ta(1) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one Sm(1), and one Ta(2) atom. In the eighth O site, O(8) is bonded to one Sr(2), one Sr(3), one Sr(4), one Sm(1), and one Ta(2) atom to form distorted corner-sharing OSr3SmTa square pyramids. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Li(1), one Sr(1), one Sr(3), one Sr(4), one Sm(2), and one Ta(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Sm(2), and one Ta(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sm(1), and one Ta(2) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Sm(1), and one Ta(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr4LiSm2Ta2O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.818
_cell_length_b   6.182
_cell_length_c   8.443
_cell_angle_alpha   91.716
_cell_angle_beta   90.838
_cell_angle_gamma   89.247
_symmetry_Int_Tables_number   1
_cell_volume   303.485
_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  0.038  0.448  0.248  1.0
  Sr  Sr1  1  0.981  0.560  0.741  1.0
  Sr  Sr2  1  0.470  0.899  0.282  1.0
  Sr  Sr3  1  0.515  0.061  0.752  1.0
  Li  Li4  1  0.636  0.223  0.148  1.0
  Sm  Sm5  1  0.993  0.000  0.500  1.0
  Sm  Sm6  1  0.499  0.539  0.982  1.0
  Ta  Ta7  1  0.013  0.009  1.000  1.0
  Ta  Ta8  1  0.499  0.485  0.500  1.0
  O  O9  1  0.886  0.049  0.230  1.0
  O  O10  1  0.092  0.976  0.771  1.0
  O  O11  1  0.586  0.503  0.261  1.0
  O  O12  1  0.401  0.475  0.728  1.0
  O  O13  1  0.184  0.738  0.061  1.0
  O  O14  1  0.813  0.285  0.959  1.0
  O  O15  1  0.312  0.217  0.449  1.0
  O  O16  1  0.685  0.764  0.544  1.0
  O  O17  1  0.299  0.189  0.052  1.0
  O  O18  1  0.730  0.821  0.947  1.0
  O  O19  1  0.218  0.685  0.456  1.0
  O  O20  1  0.774  0.303  0.555  1.0
[/CIF]
.
The structure described by LiSr4Sm2Ta2O12 is Orthorhombic Perovskite-derived structured and crystallizes in the triclinic P1 space group. Li(1) is bonded to one O(1), one O(3), one O(6), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Sm(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  an edgeedge with one Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-64°. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(6), one O(7), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(2), one O(4), one O(5), one O(6), and one O(8) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(2), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(7), and one O(8) atom to form SmO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Ta(2)O6 octahedra, and  a cornercorner with one Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 26-38°. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one O(10), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form TaO6 octahedra that share corners with two equivalent Sm(1)O6 octahedra,  a cornercorner with one Li(1)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 29-38°. In the second Ta site, Ta(2) is bonded to one O(11), one O(12), one O(3), one O(4), one O(7), and one O(8) atom to form TaO6 octahedra that share corners with four equivalent Sm(1)O6 octahedra and  a cornercorner with one Li(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 26-32°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Li(1), one Sr(1), one Sr(3), one Sm(1), and one Ta(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Sm(1), and one Ta(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Li(1), one Sr(1), one Sr(3), one Sm(2), and one Ta(2) atom. In the fourth O site, O(4) is bonded to one Sr(2), one Sr(4), one Sm(2), and one Ta(2) atom to form distorted corner-sharing OSr2SmTa tetrahedra. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sm(2), and one Ta(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Li(1), one Sr(1), one Sr(2), one Sr(4), one Sm(2), and one Ta(1) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), one Sm(1), and one Ta(2) atom. In the eighth O site, O(8) is bonded to one Sr(2), one Sr(3), one Sr(4), one Sm(1), and one Ta(2) atom to form distorted corner-sharing OSr3SmTa square pyramids. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Li(1), one Sr(1), one Sr(3), one Sr(4), one Sm(2), and one Ta(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Sm(2), and one Ta(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sm(1), and one Ta(2) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Sm(1), and one Ta(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr4LiSm2Ta2O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.818
_cell_length_b   6.182
_cell_length_c   8.443
_cell_angle_alpha   91.716
_cell_angle_beta   90.838
_cell_angle_gamma   89.247
_symmetry_Int_Tables_number   1
_cell_volume   303.485
_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  0.038  0.448  0.248  1.0
  Sr  Sr1  1  0.981  0.560  0.741  1.0
  Sr  Sr2  1  0.470  0.899  0.282  1.0
  Sr  Sr3  1  0.515  0.061  0.752  1.0
  Li  Li4  1  0.636  0.223  0.148  1.0
  Sm  Sm5  1  0.993  0.000  0.500  1.0
  Sm  Sm6  1  0.499  0.539  0.982  1.0
  Ta  Ta7  1  0.013  0.009  1.000  1.0
  Ta  Ta8  1  0.499  0.485  0.500  1.0
  O  O9  1  0.886  0.049  0.230  1.0
  O  O10  1  0.092  0.976  0.771  1.0
  O  O11  1  0.586  0.503  0.261  1.0
  O  O12  1  0.401  0.475  0.728  1.0
  O  O13  1  0.184  0.738  0.061  1.0
  O  O14  1  0.813  0.285  0.959  1.0
  O  O15  1  0.312  0.217  0.449  1.0
  O  O16  1  0.685  0.764  0.544  1.0
  O  O17  1  0.299  0.189  0.052  1.0
  O  O18  1  0.730  0.821  0.947  1.0
  O  O19  1  0.218  0.685  0.456  1.0
  O  O20  1  0.774  0.303  0.555  1.0
[/CIF]
.