The structure described by MgLa2Fe2(TeO6)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form MgO6 octahedra that share edges with three equivalent Fe(2)O6 octahedra, edges with three equivalent Te(2)O6 octahedra,  a faceface with one La(1)O6 octahedra, and  a faceface with one La(2)O6 octahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to one O(1), one O(2), one O(3), one O(7), one O(8), and one O(9) atom to form distorted LaO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Te(1)O6 octahedra, corners with three equivalent Te(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-58°. In the second La site, La(2) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(6) atom to form distorted LaO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Te(1)O6 octahedra, corners with three equivalent Te(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(2), and one O(3) atom to form FeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, and edges with three equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-59°. In the second Fe site, Fe(2) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form FeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-54°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(2), and one O(3) atom to form TeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-50°. In the second Te site, Te(2) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form TeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-43°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one La(1), one Fe(1), and one Te(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one La(1), one Fe(1), and one Te(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one La(1), one Fe(1), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(1), one Fe(2), and one Te(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(1), one Fe(2), and one Te(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(1), one Fe(2), and one Te(2) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one La(2), one Fe(1), and one Te(1) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one La(2), one Fe(1), and one Te(1) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one La(2), one Fe(1), and one Te(1) atom. is represented by the CIF file [CIF]
data_La2MgFe2(TeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.349
_cell_length_b   5.341
_cell_length_c   10.990
_cell_angle_alpha   89.890
_cell_angle_beta   89.985
_cell_angle_gamma   59.852
_symmetry_Int_Tables_number   1
_cell_volume   271.467
_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  0.001  0.999  0.534  1.0
  La  La1  1  0.002  0.999  0.966  1.0
  Mg  Mg2  1  0.999  0.000  0.250  1.0
  Fe  Fe3  1  0.338  0.331  0.750  1.0
  Fe  Fe4  1  0.668  0.663  0.250  1.0
  Te  Te5  1  0.668  0.667  0.750  1.0
  Te  Te6  1  0.333  0.332  0.250  1.0
  O  O7  1  0.977  0.376  0.648  1.0
  O  O8  1  0.647  0.975  0.646  1.0
  O  O9  1  0.379  0.653  0.647  1.0
  O  O10  1  0.651  0.029  0.152  1.0
  O  O11  1  0.316  0.651  0.151  1.0
  O  O12  1  0.029  0.321  0.151  1.0
  O  O13  1  0.032  0.650  0.349  1.0
  O  O14  1  0.317  0.031  0.349  1.0
  O  O15  1  0.649  0.322  0.348  1.0
  O  O16  1  0.377  0.973  0.852  1.0
  O  O17  1  0.645  0.379  0.852  1.0
  O  O18  1  0.972  0.650  0.854  1.0
[/CIF]
.
The structure described by MgLa2Fe2(TeO6)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form MgO6 octahedra that share edges with three equivalent Fe(2)O6 octahedra, edges with three equivalent Te(2)O6 octahedra,  a faceface with one La(1)O6 octahedra, and  a faceface with one La(2)O6 octahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to one O(1), one O(2), one O(3), one O(7), one O(8), and one O(9) atom to form distorted LaO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Te(1)O6 octahedra, corners with three equivalent Te(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-58°. In the second La site, La(2) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(6) atom to form distorted LaO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Te(1)O6 octahedra, corners with three equivalent Te(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(2), and one O(3) atom to form FeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, and edges with three equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-59°. In the second Fe site, Fe(2) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form FeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Te(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 53-54°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(2), and one O(3) atom to form TeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, and edges with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-50°. In the second Te site, Te(2) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form TeO6 octahedra that share corners with three equivalent La(1)O6 octahedra, corners with three equivalent La(2)O6 octahedra, edges with three equivalent Mg(1)O6 octahedra, and edges with three equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-43°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one La(1), one Fe(1), and one Te(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one La(1), one Fe(1), and one Te(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one La(1), one Fe(1), and one Te(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), one Fe(2), and one Te(2) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(1), one Fe(2), and one Te(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(1), one Fe(2), and one Te(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(1), one Fe(2), and one Te(2) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one La(2), one Fe(1), and one Te(1) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one La(2), one Fe(1), and one Te(1) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one La(2), one Fe(1), and one Te(1) atom. is represented by the CIF file [CIF]
data_La2MgFe2(TeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.349
_cell_length_b   5.341
_cell_length_c   10.990
_cell_angle_alpha   89.890
_cell_angle_beta   89.985
_cell_angle_gamma   59.852
_symmetry_Int_Tables_number   1
_cell_volume   271.467
_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  0.001  0.999  0.534  1.0
  La  La1  1  0.002  0.999  0.966  1.0
  Mg  Mg2  1  0.999  0.000  0.250  1.0
  Fe  Fe3  1  0.338  0.331  0.750  1.0
  Fe  Fe4  1  0.668  0.663  0.250  1.0
  Te  Te5  1  0.668  0.667  0.750  1.0
  Te  Te6  1  0.333  0.332  0.250  1.0
  O  O7  1  0.977  0.376  0.648  1.0
  O  O8  1  0.647  0.975  0.646  1.0
  O  O9  1  0.379  0.653  0.647  1.0
  O  O10  1  0.651  0.029  0.152  1.0
  O  O11  1  0.316  0.651  0.151  1.0
  O  O12  1  0.029  0.321  0.151  1.0
  O  O13  1  0.032  0.650  0.349  1.0
  O  O14  1  0.317  0.031  0.349  1.0
  O  O15  1  0.649  0.322  0.348  1.0
  O  O16  1  0.377  0.973  0.852  1.0
  O  O17  1  0.645  0.379  0.852  1.0
  O  O18  1  0.972  0.650  0.854  1.0
[/CIF]
.