The crystal structure described by Mg3Te4O11 crystallizes in the triclinic P-1 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), one O(2), and two equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing MgO5 trigonal bipyramids. In the second Mg site, Mg(2) is bonded to one O(1), one O(10), one O(6), one O(7), and one O(9) atom to form distorted corner-sharing MgO5 trigonal bipyramids. In the third Mg site, Mg(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(4), one O(5), and one O(8) atom. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted see-saw-like geometry to one O(3), one O(4), one O(8), and one O(9) atom. In the second Te site, Te(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the third Te site, Te(3) is bonded in a distorted rectangular see-saw-like geometry to one O(5), one O(6), one O(7), and one O(8) atom. In the fourth Te site, Te(4) is bonded in a 3-coordinate geometry to one O(10), one O(11), and one O(9) atom. There are eleven inequivalent O sites. In the first O site, O(11) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(3), and one Te(4) atom. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(2), and one Te(2) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Mg(1), one Mg(3), and one Te(2) atom. In the fourth O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one Te(1) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(3), one Te(1), and one Te(2) atom. In the sixth O site, O(5) is bonded in a trigonal planar geometry to one Mg(3), one Te(2), and one Te(3) atom. In the seventh O site, O(6) is bonded in a bent 120 degrees geometry to one Mg(2) and one Te(3) atom. In the eighth O site, O(7) is bonded in a bent 120 degrees geometry to one Mg(2) and one Te(3) atom. In the ninth O site, O(8) is bonded in a trigonal planar geometry to one Mg(3), one Te(1), and one Te(3) atom. In the tenth O site, O(9) is bonded in a 3-coordinate geometry to one Mg(2), one Te(1), and one Te(4) atom. In the eleventh O site, O(10) is bonded in a trigonal planar geometry to one Mg(2), one Mg(3), and one Te(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg3Te4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.201
_cell_length_b   8.299
_cell_length_c   8.920
_cell_angle_alpha   65.365
_cell_angle_beta   70.212
_cell_angle_gamma   75.797
_symmetry_Int_Tables_number   1
_cell_volume   515.396
_cell_formula_units_Z   2
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  0.410  0.014  0.354  1.0
  Mg  Mg1  1  0.590  0.986  0.646  1.0
  Mg  Mg2  1  0.977  0.186  0.652  1.0
  Mg  Mg3  1  0.448  0.698  0.107  1.0
  Mg  Mg4  1  0.023  0.814  0.348  1.0
  Mg  Mg5  1  0.552  0.302  0.893  1.0
  Te  Te6  1  0.241  0.727  0.773  1.0
  Te  Te7  1  0.817  0.628  0.780  1.0
  Te  Te8  1  0.183  0.372  0.220  1.0
  Te  Te9  1  0.759  0.273  0.227  1.0
  Te  Te10  1  0.297  0.460  0.548  1.0
  Te  Te11  1  0.803  0.899  0.053  1.0
  Te  Te12  1  0.703  0.540  0.452  1.0
  Te  Te13  1  0.197  0.101  0.947  1.0
  O  O14  1  0.838  0.838  0.569  1.0
  O  O15  1  0.366  0.224  0.122  1.0
  O  O16  1  0.162  0.162  0.431  1.0
  O  O17  1  0.425  0.857  0.607  1.0
  O  O18  1  0.575  0.143  0.393  1.0
  O  O19  1  0.684  0.371  0.026  1.0
  O  O20  1  0.301  0.489  0.291  1.0
  O  O21  1  0.316  0.629  0.974  1.0
  O  O22  1  0.923  0.623  0.335  1.0
  O  O23  1  0.785  0.294  0.520  1.0
  O  O24  1  0.077  0.377  0.665  1.0
  O  O25  1  0.662  0.517  0.243  1.0
  O  O26  1  0.634  0.776  0.878  1.0
  O  O27  1  0.122  0.996  0.830  1.0
  O  O28  1  0.238  0.891  0.135  1.0
  O  O29  1  0.338  0.483  0.757  1.0
  O  O30  1  0.215  0.706  0.480  1.0
  O  O31  1  0.762  0.109  0.865  1.0
  O  O32  1  0.878  0.004  0.170  1.0
  O  O33  1  0.432  0.125  0.802  1.0
  O  O34  1  0.568  0.875  0.198  1.0
  O  O35  1  0.699  0.511  0.709  1.0
[/CIF]
.
The crystal structure described by Mg3Te4O11 crystallizes in the triclinic P-1 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(11), one O(2), and two equivalent O(3) atoms to form a mixture of distorted corner and edge-sharing MgO5 trigonal bipyramids. In the second Mg site, Mg(2) is bonded to one O(1), one O(10), one O(6), one O(7), and one O(9) atom to form distorted corner-sharing MgO5 trigonal bipyramids. In the third Mg site, Mg(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(4), one O(5), and one O(8) atom. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted see-saw-like geometry to one O(3), one O(4), one O(8), and one O(9) atom. In the second Te site, Te(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the third Te site, Te(3) is bonded in a distorted rectangular see-saw-like geometry to one O(5), one O(6), one O(7), and one O(8) atom. In the fourth Te site, Te(4) is bonded in a 3-coordinate geometry to one O(10), one O(11), and one O(9) atom. There are eleven inequivalent O sites. In the first O site, O(11) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(3), and one Te(4) atom. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(2), and one Te(2) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Mg(1), one Mg(3), and one Te(2) atom. In the fourth O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one Te(1) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(3), one Te(1), and one Te(2) atom. In the sixth O site, O(5) is bonded in a trigonal planar geometry to one Mg(3), one Te(2), and one Te(3) atom. In the seventh O site, O(6) is bonded in a bent 120 degrees geometry to one Mg(2) and one Te(3) atom. In the eighth O site, O(7) is bonded in a bent 120 degrees geometry to one Mg(2) and one Te(3) atom. In the ninth O site, O(8) is bonded in a trigonal planar geometry to one Mg(3), one Te(1), and one Te(3) atom. In the tenth O site, O(9) is bonded in a 3-coordinate geometry to one Mg(2), one Te(1), and one Te(4) atom. In the eleventh O site, O(10) is bonded in a trigonal planar geometry to one Mg(2), one Mg(3), and one Te(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg3Te4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.201
_cell_length_b   8.299
_cell_length_c   8.920
_cell_angle_alpha   65.365
_cell_angle_beta   70.212
_cell_angle_gamma   75.797
_symmetry_Int_Tables_number   1
_cell_volume   515.396
_cell_formula_units_Z   2
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  0.410  0.014  0.354  1.0
  Mg  Mg1  1  0.590  0.986  0.646  1.0
  Mg  Mg2  1  0.977  0.186  0.652  1.0
  Mg  Mg3  1  0.448  0.698  0.107  1.0
  Mg  Mg4  1  0.023  0.814  0.348  1.0
  Mg  Mg5  1  0.552  0.302  0.893  1.0
  Te  Te6  1  0.241  0.727  0.773  1.0
  Te  Te7  1  0.817  0.628  0.780  1.0
  Te  Te8  1  0.183  0.372  0.220  1.0
  Te  Te9  1  0.759  0.273  0.227  1.0
  Te  Te10  1  0.297  0.460  0.548  1.0
  Te  Te11  1  0.803  0.899  0.053  1.0
  Te  Te12  1  0.703  0.540  0.452  1.0
  Te  Te13  1  0.197  0.101  0.947  1.0
  O  O14  1  0.838  0.838  0.569  1.0
  O  O15  1  0.366  0.224  0.122  1.0
  O  O16  1  0.162  0.162  0.431  1.0
  O  O17  1  0.425  0.857  0.607  1.0
  O  O18  1  0.575  0.143  0.393  1.0
  O  O19  1  0.684  0.371  0.026  1.0
  O  O20  1  0.301  0.489  0.291  1.0
  O  O21  1  0.316  0.629  0.974  1.0
  O  O22  1  0.923  0.623  0.335  1.0
  O  O23  1  0.785  0.294  0.520  1.0
  O  O24  1  0.077  0.377  0.665  1.0
  O  O25  1  0.662  0.517  0.243  1.0
  O  O26  1  0.634  0.776  0.878  1.0
  O  O27  1  0.122  0.996  0.830  1.0
  O  O28  1  0.238  0.891  0.135  1.0
  O  O29  1  0.338  0.483  0.757  1.0
  O  O30  1  0.215  0.706  0.480  1.0
  O  O31  1  0.762  0.109  0.865  1.0
  O  O32  1  0.878  0.004  0.170  1.0
  O  O33  1  0.432  0.125  0.802  1.0
  O  O34  1  0.568  0.875  0.198  1.0
  O  O35  1  0.699  0.511  0.709  1.0
[/CIF]
.