The crystal structure described by MgFe4(TeO6)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(5) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(4), one O(6), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with three equivalent Te(1)O5 trigonal bipyramids,  an edgeedge with one Fe(2)O6 octahedra, and  an edgeedge with one Te(2)O6 octahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(6) and four equivalent O(3) atoms to form distorted TeO5 trigonal bipyramids that share corners with six equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-50°. In the second Te site, Te(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form TeO6 octahedra that share edges with two equivalent Fe(2)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Fe(2), and one Te(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Te(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Te(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to two equivalent Fe(2) atoms. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Fe(1), and one Te(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Fe(2) and one Te(1) atom. is represented by the CIF card [CIF]
data_MgFe4(TeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.307
_cell_length_b   5.305
_cell_length_c   9.008
_cell_angle_alpha   89.997
_cell_angle_beta   89.997
_cell_angle_gamma   76.351
_symmetry_Int_Tables_number   1
_cell_volume   246.429
_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
  Mg  Mg0  1  0.810  0.811  0.500  1.0
  Fe  Fe1  1  0.090  0.090  0.316  1.0
  Fe  Fe2  1  0.496  0.497  0.841  1.0
  Fe  Fe3  1  0.090  0.090  0.684  1.0
  Fe  Fe4  1  0.496  0.497  0.159  1.0
  Te  Te5  1  0.927  0.928  1.000  1.0
  Te  Te6  1  0.474  0.474  0.500  1.0
  O  O7  1  0.640  0.641  0.652  1.0
  O  O8  1  0.326  0.326  0.663  1.0
  O  O9  1  0.640  0.641  0.348  1.0
  O  O10  1  0.179  0.804  0.156  1.0
  O  O11  1  0.804  0.181  0.156  1.0
  O  O12  1  0.804  0.181  0.844  1.0
  O  O13  1  0.353  0.353  0.000  1.0
  O  O14  1  0.183  0.791  0.500  1.0
  O  O15  1  0.791  0.184  0.500  1.0
  O  O16  1  0.179  0.804  0.844  1.0
  O  O17  1  0.326  0.325  0.337  1.0
  O  O18  1  0.698  0.701  0.000  1.0
[/CIF]
.
The crystal structure described by MgFe4(TeO6)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(5) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Fe site, Fe(2) is bonded to one O(1), one O(2), one O(4), one O(6), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with three equivalent Te(1)O5 trigonal bipyramids,  an edgeedge with one Fe(2)O6 octahedra, and  an edgeedge with one Te(2)O6 octahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(6) and four equivalent O(3) atoms to form distorted TeO5 trigonal bipyramids that share corners with six equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-50°. In the second Te site, Te(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form TeO6 octahedra that share edges with two equivalent Fe(2)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to one Mg(1), one Fe(2), and one Te(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Te(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Te(1) atom. In the fourth O site, O(4) is bonded in a water-like geometry to two equivalent Fe(2) atoms. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Fe(1), and one Te(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Fe(2) and one Te(1) atom. is represented by the CIF card [CIF]
data_MgFe4(TeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.307
_cell_length_b   5.305
_cell_length_c   9.008
_cell_angle_alpha   89.997
_cell_angle_beta   89.997
_cell_angle_gamma   76.351
_symmetry_Int_Tables_number   1
_cell_volume   246.429
_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
  Mg  Mg0  1  0.810  0.811  0.500  1.0
  Fe  Fe1  1  0.090  0.090  0.316  1.0
  Fe  Fe2  1  0.496  0.497  0.841  1.0
  Fe  Fe3  1  0.090  0.090  0.684  1.0
  Fe  Fe4  1  0.496  0.497  0.159  1.0
  Te  Te5  1  0.927  0.928  1.000  1.0
  Te  Te6  1  0.474  0.474  0.500  1.0
  O  O7  1  0.640  0.641  0.652  1.0
  O  O8  1  0.326  0.326  0.663  1.0
  O  O9  1  0.640  0.641  0.348  1.0
  O  O10  1  0.179  0.804  0.156  1.0
  O  O11  1  0.804  0.181  0.156  1.0
  O  O12  1  0.804  0.181  0.844  1.0
  O  O13  1  0.353  0.353  0.000  1.0
  O  O14  1  0.183  0.791  0.500  1.0
  O  O15  1  0.791  0.184  0.500  1.0
  O  O16  1  0.179  0.804  0.844  1.0
  O  O17  1  0.326  0.325  0.337  1.0
  O  O18  1  0.698  0.701  0.000  1.0
[/CIF]
.