The material structure described by La7Ta3W4O30 crystallizes in the triclinic P-1 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(10), one O(15), one O(3), one O(4), one O(6), one O(7), one O(9), and two equivalent O(11) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(1), one O(11), one O(13), one O(4), one O(5), one O(7), one O(8), and two equivalent O(12) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(12), one O(14), one O(2), one O(5), one O(6), one O(8), one O(9), and two equivalent O(10) atoms. In the fourth La site, La(4) is bonded to two equivalent O(1), two equivalent O(13), two equivalent O(14), two equivalent O(15), two equivalent O(2), and two equivalent O(3) atoms to form LaO12 cuboctahedra that share faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Ta(2)O6 octahedra, faces with two equivalent W(1)O6 octahedra, and faces with two equivalent W(2)O6 octahedra. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent O(13), two equivalent O(14), and two equivalent O(15) atoms to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(2)O6 octahedra, and faces with two equivalent La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 35-36°. In the second Ta site, Ta(2) is bonded to one O(1), one O(10), one O(14), one O(3), one O(4), and one O(7) atom to form distorted TaO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one W(1)O6 octahedra,  a cornercorner with one W(2)O6 octahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 30-36°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(11), one O(15), one O(2), one O(5), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one W(2)O6 octahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 29-35°. In the second W site, W(2) is bonded to one O(12), one O(13), one O(2), one O(3), one O(6), and one O(9) atom to form distorted WO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one W(1)O6 octahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 29-35°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(2), one La(4), one Ta(2), and one W(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one La(3), one La(4), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one La(1), one La(4), one Ta(2), and one W(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one La(1), one La(2), and one Ta(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one La(2), one La(3), and one W(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one La(1), one La(3), and one W(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one La(1), one La(2), and one Ta(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one La(2), one La(3), and one W(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one La(1), one La(3), and one W(2) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(3), and one Ta(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), and one W(1) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one La(3), two equivalent La(2), and one W(2) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one La(2), one La(4), one Ta(1), and one W(2) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one La(3), one La(4), one Ta(1), and one Ta(2) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one La(1), one La(4), one Ta(1), and one W(1) atom. is represented by the CIF card [CIF]
data_La7Ta3(W2O15)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.951
_cell_length_b   10.238
_cell_length_c   10.245
_cell_angle_alpha   115.085
_cell_angle_beta   103.263
_cell_angle_gamma   102.717
_symmetry_Int_Tables_number   1
_cell_volume   599.558
_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
  La  La0  1  0.636  0.760  0.192  1.0
  La  La1  1  0.877  0.435  0.234  1.0
  La  La2  1  0.449  0.814  0.567  1.0
  La  La3  1  0.364  0.240  0.808  1.0
  La  La4  1  0.123  0.565  0.766  1.0
  La  La5  1  0.551  0.186  0.433  1.0
  La  La6  1  0.000  0.000  0.000  1.0
  Ta  Ta7  1  0.500  0.000  0.000  1.0
  Ta  Ta8  1  0.852  0.214  0.830  1.0
  Ta  Ta9  1  0.148  0.786  0.170  1.0
  W  W10  1  0.641  0.621  0.788  1.0
  W  W11  1  0.018  0.166  0.377  1.0
  W  W12  1  0.359  0.379  0.212  1.0
  W  W13  1  0.982  0.834  0.623  1.0
  O  O14  1  0.068  0.281  0.057  1.0
  O  O15  1  0.784  0.773  0.719  1.0
  O  O16  1  0.009  0.949  0.225  1.0
  O  O17  1  0.932  0.719  0.943  1.0
  O  O18  1  0.216  0.227  0.281  1.0
  O  O19  1  0.991  0.051  0.775  1.0
  O  O20  1  0.736  0.344  0.957  1.0
  O  O21  1  0.397  0.612  0.656  1.0
  O  O22  1  0.788  0.046  0.392  1.0
  O  O23  1  0.264  0.656  0.043  1.0
  O  O24  1  0.603  0.388  0.344  1.0
  O  O25  1  0.212  0.954  0.608  1.0
  O  O26  1  0.056  0.335  0.792  1.0
  O  O27  1  0.713  0.461  0.664  1.0
  O  O28  1  0.251  0.203  0.537  1.0
  O  O29  1  0.944  0.665  0.208  1.0
  O  O30  1  0.287  0.539  0.336  1.0
  O  O31  1  0.749  0.797  0.463  1.0
  O  O32  1  0.615  0.135  0.649  1.0
  O  O33  1  0.492  0.518  0.866  1.0
  O  O34  1  0.971  0.347  0.480  1.0
  O  O35  1  0.385  0.865  0.351  1.0
  O  O36  1  0.508  0.482  0.134  1.0
  O  O37  1  0.029  0.653  0.520  1.0
  O  O38  1  0.785  0.138  0.175  1.0
  O  O39  1  0.638  0.032  0.859  1.0
  O  O40  1  0.607  0.823  0.963  1.0
  O  O41  1  0.215  0.862  0.825  1.0
  O  O42  1  0.362  0.968  0.141  1.0
  O  O43  1  0.393  0.177  0.037  1.0
[/CIF]
.
The material structure described by La7Ta3W4O30 crystallizes in the triclinic P-1 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(10), one O(15), one O(3), one O(4), one O(6), one O(7), one O(9), and two equivalent O(11) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(1), one O(11), one O(13), one O(4), one O(5), one O(7), one O(8), and two equivalent O(12) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(12), one O(14), one O(2), one O(5), one O(6), one O(8), one O(9), and two equivalent O(10) atoms. In the fourth La site, La(4) is bonded to two equivalent O(1), two equivalent O(13), two equivalent O(14), two equivalent O(15), two equivalent O(2), and two equivalent O(3) atoms to form LaO12 cuboctahedra that share faces with two equivalent Ta(1)O6 octahedra, faces with two equivalent Ta(2)O6 octahedra, faces with two equivalent W(1)O6 octahedra, and faces with two equivalent W(2)O6 octahedra. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to two equivalent O(13), two equivalent O(14), and two equivalent O(15) atoms to form TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(2)O6 octahedra, and faces with two equivalent La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 35-36°. In the second Ta site, Ta(2) is bonded to one O(1), one O(10), one O(14), one O(3), one O(4), and one O(7) atom to form distorted TaO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one W(1)O6 octahedra,  a cornercorner with one W(2)O6 octahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 30-36°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(11), one O(15), one O(2), one O(5), and one O(8) atom to form distorted WO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one W(2)O6 octahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 29-35°. In the second W site, W(2) is bonded to one O(12), one O(13), one O(2), one O(3), one O(6), and one O(9) atom to form distorted WO6 octahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra,  a cornercorner with one W(1)O6 octahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 29-35°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(2), one La(4), one Ta(2), and one W(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one La(3), one La(4), one W(1), and one W(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one La(1), one La(4), one Ta(2), and one W(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one La(1), one La(2), and one Ta(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one La(2), one La(3), and one W(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one La(1), one La(3), and one W(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one La(1), one La(2), and one Ta(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one La(2), one La(3), and one W(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one La(1), one La(3), and one W(2) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one La(1), two equivalent La(3), and one Ta(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(1), and one W(1) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one La(3), two equivalent La(2), and one W(2) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one La(2), one La(4), one Ta(1), and one W(2) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one La(3), one La(4), one Ta(1), and one Ta(2) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one La(1), one La(4), one Ta(1), and one W(1) atom. is represented by the CIF card [CIF]
data_La7Ta3(W2O15)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.951
_cell_length_b   10.238
_cell_length_c   10.245
_cell_angle_alpha   115.085
_cell_angle_beta   103.263
_cell_angle_gamma   102.717
_symmetry_Int_Tables_number   1
_cell_volume   599.558
_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
  La  La0  1  0.636  0.760  0.192  1.0
  La  La1  1  0.877  0.435  0.234  1.0
  La  La2  1  0.449  0.814  0.567  1.0
  La  La3  1  0.364  0.240  0.808  1.0
  La  La4  1  0.123  0.565  0.766  1.0
  La  La5  1  0.551  0.186  0.433  1.0
  La  La6  1  0.000  0.000  0.000  1.0
  Ta  Ta7  1  0.500  0.000  0.000  1.0
  Ta  Ta8  1  0.852  0.214  0.830  1.0
  Ta  Ta9  1  0.148  0.786  0.170  1.0
  W  W10  1  0.641  0.621  0.788  1.0
  W  W11  1  0.018  0.166  0.377  1.0
  W  W12  1  0.359  0.379  0.212  1.0
  W  W13  1  0.982  0.834  0.623  1.0
  O  O14  1  0.068  0.281  0.057  1.0
  O  O15  1  0.784  0.773  0.719  1.0
  O  O16  1  0.009  0.949  0.225  1.0
  O  O17  1  0.932  0.719  0.943  1.0
  O  O18  1  0.216  0.227  0.281  1.0
  O  O19  1  0.991  0.051  0.775  1.0
  O  O20  1  0.736  0.344  0.957  1.0
  O  O21  1  0.397  0.612  0.656  1.0
  O  O22  1  0.788  0.046  0.392  1.0
  O  O23  1  0.264  0.656  0.043  1.0
  O  O24  1  0.603  0.388  0.344  1.0
  O  O25  1  0.212  0.954  0.608  1.0
  O  O26  1  0.056  0.335  0.792  1.0
  O  O27  1  0.713  0.461  0.664  1.0
  O  O28  1  0.251  0.203  0.537  1.0
  O  O29  1  0.944  0.665  0.208  1.0
  O  O30  1  0.287  0.539  0.336  1.0
  O  O31  1  0.749  0.797  0.463  1.0
  O  O32  1  0.615  0.135  0.649  1.0
  O  O33  1  0.492  0.518  0.866  1.0
  O  O34  1  0.971  0.347  0.480  1.0
  O  O35  1  0.385  0.865  0.351  1.0
  O  O36  1  0.508  0.482  0.134  1.0
  O  O37  1  0.029  0.653  0.520  1.0
  O  O38  1  0.785  0.138  0.175  1.0
  O  O39  1  0.638  0.032  0.859  1.0
  O  O40  1  0.607  0.823  0.963  1.0
  O  O41  1  0.215  0.862  0.825  1.0
  O  O42  1  0.362  0.968  0.141  1.0
  O  O43  1  0.393  0.177  0.037  1.0
[/CIF]
.