The material structure described by La6TaGa11O28 is Esseneite-like structured and crystallizes in the monoclinic C2 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one O(1), one O(14), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(2), one O(3), one O(6), one O(7), and one O(8) atom. In the third La site, La(3) is bonded in a 8-coordinate geometry to two equivalent O(12), two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms. In the fourth La site, La(4) is bonded in a 8-coordinate geometry to two equivalent O(11), two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms. Ta(1) is bonded to two equivalent O(10), two equivalent O(11), and two equivalent O(13) atoms to form TaO6 octahedra that share corners with two equivalent Ga(1)O4 tetrahedra, corners with two equivalent Ga(2)O4 tetrahedra, and corners with two equivalent Ga(3)O4 tetrahedra. There are six inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(11), one O(3), and one O(9) atom to form GaO4 tetrahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ga(6)O6 octahedra, and corners with two equivalent Ga(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the second Ga site, Ga(2) is bonded to one O(10), one O(12), one O(2), and one O(4) atom to form GaO4 tetrahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ga(6)O6 octahedra, and corners with two equivalent Ga(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the third Ga site, Ga(3) is bonded to one O(13), one O(14), one O(5), and one O(6) atom to form GaO4 tetrahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ga(6)O6 octahedra,  a cornercorner with one Ga(4)O4 tetrahedra, and  a cornercorner with one Ga(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the fourth Ga site, Ga(4) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form corner-sharing GaO4 tetrahedra. In the fifth Ga site, Ga(5) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form corner-sharing GaO4 tetrahedra. In the sixth Ga site, Ga(6) is bonded to two equivalent O(12), two equivalent O(14), and two equivalent O(9) atoms to form corner-sharing GaO6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Ga(1), and one Ga(4) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one La(1), one La(2), one Ga(2), and one Ga(5) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(2), one La(3), one Ga(1), and one Ga(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one La(1), one La(4), one Ga(2), and one Ga(5) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one La(1), one La(3), one Ga(3), and one Ga(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one La(2), one La(4), one Ga(3), and one Ga(5) atom. In the seventh O site, O(7) is bonded to one La(1), one La(2), one La(4), and one Ga(4) atom to form distorted corner-sharing OLa3Ga tetrahedra. In the eighth O site, O(8) is bonded to one La(1), one La(2), one La(3), and one Ga(5) atom to form distorted corner-sharing OLa3Ga tetrahedra. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one La(1), one Ga(1), and one Ga(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one La(2), one Ta(1), and one Ga(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one La(4), one Ta(1), and one Ga(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(3), one Ga(2), and one Ga(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one La(2), one Ta(1), and one Ga(3) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one La(1), one Ga(3), and one Ga(6) atom. is represented by the CIF card [CIF]
data_La6TaGa11O28
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.801
_cell_length_b   9.801
_cell_length_c   10.355
_cell_angle_alpha   58.101
_cell_angle_beta   58.101
_cell_angle_gamma   50.243
_symmetry_Int_Tables_number   1
_cell_volume   620.897
_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  0.580  0.001  0.209  1.0
  La  La1  1  0.571  0.999  0.715  1.0
  La  La2  1  0.419  0.581  0.000  1.0
  La  La3  1  0.430  0.570  0.500  1.0
  La  La4  1  0.999  0.420  0.791  1.0
  La  La5  1  0.001  0.429  0.285  1.0
  Ta  Ta6  1  1.000  0.000  0.500  1.0
  Ga  Ga7  1  0.241  0.999  0.635  1.0
  Ga  Ga8  1  0.241  0.001  0.125  1.0
  Ga  Ga9  1  0.759  0.240  0.245  1.0
  Ga  Ga10  1  0.760  0.241  0.755  1.0
  Ga  Ga11  1  0.001  0.759  0.365  1.0
  Ga  Ga12  1  0.999  0.759  0.875  1.0
  Ga  Ga13  1  0.333  0.331  0.403  1.0
  Ga  Ga14  1  0.333  0.336  0.900  1.0
  Ga  Ga15  1  0.669  0.667  0.597  1.0
  Ga  Ga16  1  0.664  0.667  0.100  1.0
  Ga  Ga17  1  0.000  1.000  0.000  1.0
  O  O18  1  0.855  0.691  0.576  1.0
  O  O19  1  0.852  0.688  0.079  1.0
  O  O20  1  0.459  0.853  0.693  1.0
  O  O21  1  0.454  0.854  0.194  1.0
  O  O22  1  0.689  0.459  0.775  1.0
  O  O23  1  0.690  0.454  0.276  1.0
  O  O24  1  0.147  0.541  0.307  1.0
  O  O25  1  0.146  0.546  0.806  1.0
  O  O26  1  0.309  0.145  0.424  1.0
  O  O27  1  0.312  0.148  0.921  1.0
  O  O28  1  0.541  0.311  0.225  1.0
  O  O29  1  0.546  0.310  0.724  1.0
  O  O30  1  0.336  0.333  0.577  1.0
  O  O31  1  0.331  0.334  0.078  1.0
  O  O32  1  0.667  0.664  0.423  1.0
  O  O33  1  0.666  0.669  0.922  1.0
  O  O34  1  0.855  0.925  0.230  1.0
  O  O35  1  0.860  0.920  0.727  1.0
  O  O36  1  0.220  0.860  0.576  1.0
  O  O37  1  0.220  0.855  0.083  1.0
  O  O38  1  0.919  0.221  0.546  1.0
  O  O39  1  0.926  0.220  0.048  1.0
  O  O40  1  0.140  0.780  0.424  1.0
  O  O41  1  0.145  0.780  0.917  1.0
  O  O42  1  0.075  0.145  0.770  1.0
  O  O43  1  0.080  0.140  0.273  1.0
  O  O44  1  0.779  0.081  0.454  1.0
  O  O45  1  0.780  0.074  0.952  1.0
[/CIF]
.
The material structure described by La6TaGa11O28 is Esseneite-like structured and crystallizes in the monoclinic C2 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one O(1), one O(14), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(13), one O(2), one O(3), one O(6), one O(7), and one O(8) atom. In the third La site, La(3) is bonded in a 8-coordinate geometry to two equivalent O(12), two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms. In the fourth La site, La(4) is bonded in a 8-coordinate geometry to two equivalent O(11), two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms. Ta(1) is bonded to two equivalent O(10), two equivalent O(11), and two equivalent O(13) atoms to form TaO6 octahedra that share corners with two equivalent Ga(1)O4 tetrahedra, corners with two equivalent Ga(2)O4 tetrahedra, and corners with two equivalent Ga(3)O4 tetrahedra. There are six inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(11), one O(3), and one O(9) atom to form GaO4 tetrahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ga(6)O6 octahedra, and corners with two equivalent Ga(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the second Ga site, Ga(2) is bonded to one O(10), one O(12), one O(2), and one O(4) atom to form GaO4 tetrahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ga(6)O6 octahedra, and corners with two equivalent Ga(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the third Ga site, Ga(3) is bonded to one O(13), one O(14), one O(5), and one O(6) atom to form GaO4 tetrahedra that share  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ga(6)O6 octahedra,  a cornercorner with one Ga(4)O4 tetrahedra, and  a cornercorner with one Ga(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-67°. In the fourth Ga site, Ga(4) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form corner-sharing GaO4 tetrahedra. In the fifth Ga site, Ga(5) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form corner-sharing GaO4 tetrahedra. In the sixth Ga site, Ga(6) is bonded to two equivalent O(12), two equivalent O(14), and two equivalent O(9) atoms to form corner-sharing GaO6 octahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one La(1), one La(2), one Ga(1), and one Ga(4) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one La(1), one La(2), one Ga(2), and one Ga(5) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(2), one La(3), one Ga(1), and one Ga(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one La(1), one La(4), one Ga(2), and one Ga(5) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one La(1), one La(3), one Ga(3), and one Ga(4) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one La(2), one La(4), one Ga(3), and one Ga(5) atom. In the seventh O site, O(7) is bonded to one La(1), one La(2), one La(4), and one Ga(4) atom to form distorted corner-sharing OLa3Ga tetrahedra. In the eighth O site, O(8) is bonded to one La(1), one La(2), one La(3), and one Ga(5) atom to form distorted corner-sharing OLa3Ga tetrahedra. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one La(1), one Ga(1), and one Ga(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one La(2), one Ta(1), and one Ga(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one La(4), one Ta(1), and one Ga(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(3), one Ga(2), and one Ga(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one La(2), one Ta(1), and one Ga(3) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one La(1), one Ga(3), and one Ga(6) atom. is represented by the CIF card [CIF]
data_La6TaGa11O28
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.801
_cell_length_b   9.801
_cell_length_c   10.355
_cell_angle_alpha   58.101
_cell_angle_beta   58.101
_cell_angle_gamma   50.243
_symmetry_Int_Tables_number   1
_cell_volume   620.897
_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  0.580  0.001  0.209  1.0
  La  La1  1  0.571  0.999  0.715  1.0
  La  La2  1  0.419  0.581  0.000  1.0
  La  La3  1  0.430  0.570  0.500  1.0
  La  La4  1  0.999  0.420  0.791  1.0
  La  La5  1  0.001  0.429  0.285  1.0
  Ta  Ta6  1  1.000  0.000  0.500  1.0
  Ga  Ga7  1  0.241  0.999  0.635  1.0
  Ga  Ga8  1  0.241  0.001  0.125  1.0
  Ga  Ga9  1  0.759  0.240  0.245  1.0
  Ga  Ga10  1  0.760  0.241  0.755  1.0
  Ga  Ga11  1  0.001  0.759  0.365  1.0
  Ga  Ga12  1  0.999  0.759  0.875  1.0
  Ga  Ga13  1  0.333  0.331  0.403  1.0
  Ga  Ga14  1  0.333  0.336  0.900  1.0
  Ga  Ga15  1  0.669  0.667  0.597  1.0
  Ga  Ga16  1  0.664  0.667  0.100  1.0
  Ga  Ga17  1  0.000  1.000  0.000  1.0
  O  O18  1  0.855  0.691  0.576  1.0
  O  O19  1  0.852  0.688  0.079  1.0
  O  O20  1  0.459  0.853  0.693  1.0
  O  O21  1  0.454  0.854  0.194  1.0
  O  O22  1  0.689  0.459  0.775  1.0
  O  O23  1  0.690  0.454  0.276  1.0
  O  O24  1  0.147  0.541  0.307  1.0
  O  O25  1  0.146  0.546  0.806  1.0
  O  O26  1  0.309  0.145  0.424  1.0
  O  O27  1  0.312  0.148  0.921  1.0
  O  O28  1  0.541  0.311  0.225  1.0
  O  O29  1  0.546  0.310  0.724  1.0
  O  O30  1  0.336  0.333  0.577  1.0
  O  O31  1  0.331  0.334  0.078  1.0
  O  O32  1  0.667  0.664  0.423  1.0
  O  O33  1  0.666  0.669  0.922  1.0
  O  O34  1  0.855  0.925  0.230  1.0
  O  O35  1  0.860  0.920  0.727  1.0
  O  O36  1  0.220  0.860  0.576  1.0
  O  O37  1  0.220  0.855  0.083  1.0
  O  O38  1  0.919  0.221  0.546  1.0
  O  O39  1  0.926  0.220  0.048  1.0
  O  O40  1  0.140  0.780  0.424  1.0
  O  O41  1  0.145  0.780  0.917  1.0
  O  O42  1  0.075  0.145  0.770  1.0
  O  O43  1  0.080  0.140  0.273  1.0
  O  O44  1  0.779  0.081  0.454  1.0
  O  O45  1  0.780  0.074  0.952  1.0
[/CIF]
.