The material structure described by Sr6Mg(Te4O11)2 crystallizes in the triclinic P1 space group. There are six inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(17), one O(18), one O(6), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(14), one O(16), one O(17), one O(18), one O(20), one O(5), one O(7), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(17), one O(19), and one O(5) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(16), one O(18), one O(20), one O(6), and one O(9) atom. In the fifth Sr site, Sr(5) is bonded in a 7-coordinate geometry to one O(1), one O(14), one O(19), one O(2), one O(22), one O(4), and one O(9) atom. In the sixth Sr site, Sr(6) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(13), one O(2), one O(21), one O(3), and one O(4) atom. Mg(1) is bonded in a distorted see-saw-like geometry to one O(11), one O(16), one O(19), and one O(22) atom. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted trigonal non-coplanar geometry to one O(19), one O(2), and one O(5) atom. In the second Te site, Te(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(20), one O(4), and one O(6) atom. In the third Te site, Te(3) is bonded in a distorted T-shaped geometry to one O(11), one O(18), and one O(7) atom. In the fourth Te site, Te(4) is bonded in a see-saw-like geometry to one O(12), one O(17), one O(21), and one O(8) atom. In the fifth Te site, Te(5) is bonded in a distorted see-saw-like geometry to one O(14), one O(15), one O(21), and one O(6) atom. In the sixth Te site, Te(6) is bonded in a distorted trigonal non-coplanar geometry to one O(13), one O(16), and one O(22) atom. In the seventh Te site, Te(7) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(8), and one O(9) atom. In the eighth Te site, Te(8) is bonded in a 2-coordinate geometry to one O(10), one O(4), and one O(7) atom. There are twenty-two inequivalent O sites. In the first O site, O(1) is bonded to one Sr(4), one Sr(5), one Sr(6), and one Te(2) atom to form distorted OSr3Te tetrahedra that share  an edgeedge with one O(9)Sr3Te tetrahedra and  an edgeedge with one O(6)Sr2Te2 trigonal pyramid. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(5), one Sr(6), and one Te(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(6) and one Te(7) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(5), one Sr(6), one Te(2), and one Te(8) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(3), and one Te(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(4), one Te(2), and one Te(5) atom to form a mixture of distorted corner and edge-sharing OSr2Te2 trigonal pyramids. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sr(2), one Te(3), and one Te(8) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Sr(1), one Te(4), and one Te(7) atom. In the ninth O site, O(9) is bonded to one Sr(2), one Sr(4), one Sr(5), and one Te(7) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr2Te2 trigonal pyramid and  an edgeedge with one O(1)Sr3Te tetrahedra. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Sr(6), and one Te(8) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(4), one Mg(1), and one Te(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(4), and one Te(4) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Sr(6) and one Te(6) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Sr(2), one Sr(5), and one Te(5) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sr(3), and one Te(5) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Mg(1), and one Te(6) atom. In the seventeenth O site, O(17) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one Te(4) atom. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), and one Te(3) atom. In the nineteenth O site, O(19) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(5), one Mg(1), and one Te(1) atom. In the twentieth O site, O(20) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(4), and one Te(2) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal non-coplanar geometry to one Sr(6), one Te(4), and one Te(5) atom. In the twenty-second O site, O(22) is bonded in a distorted T-shaped geometry to one Sr(5), one Mg(1), and one Te(6) atom. is represented by the CIF file [CIF]
data_Sr6Mg(Te4O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.969
_cell_length_b   10.048
_cell_length_c   9.924
_cell_angle_alpha   102.624
_cell_angle_beta   113.400
_cell_angle_gamma   98.756
_symmetry_Int_Tables_number   1
_cell_volume   685.790
_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
  Sr  Sr0  1  0.280  0.005  0.148  1.0
  Sr  Sr1  1  0.711  0.938  0.884  1.0
  Sr  Sr2  1  0.823  0.050  0.335  1.0
  Sr  Sr3  1  0.145  0.882  0.693  1.0
  Sr  Sr4  1  0.323  0.547  0.609  1.0
  Sr  Sr5  1  0.678  0.495  0.343  1.0
  Mg  Mg6  1  0.276  0.192  0.612  1.0
  Te  Te7  1  0.057  0.306  0.237  1.0
  Te  Te8  1  0.915  0.628  0.769  1.0
  Te  Te9  1  0.017  0.194  0.812  1.0
  Te  Te10  1  0.974  0.752  0.229  1.0
  Te  Te11  1  0.441  0.687  0.033  1.0
  Te  Te12  1  0.560  0.308  0.935  1.0
  Te  Te13  1  0.493  0.822  0.464  1.0
  Te  Te14  1  0.629  0.276  0.575  1.0
  O  O15  1  0.001  0.594  0.615  1.0
  O  O16  1  0.993  0.462  0.323  1.0
  O  O17  1  0.431  0.632  0.350  1.0
  O  O18  1  0.587  0.461  0.555  1.0
  O  O19  1  0.820  0.170  0.122  1.0
  O  O20  1  0.158  0.762  0.923  1.0
  O  O21  1  0.759  0.107  0.742  1.0
  O  O22  1  0.277  0.880  0.338  1.0
  O  O23  1  0.402  0.803  0.610  1.0
  O  O24  1  0.591  0.190  0.365  1.0
  O  O25  1  0.036  0.112  0.626  1.0
  O  O26  1  0.962  0.843  0.411  1.0
  O  O27  1  0.459  0.327  0.076  1.0
  O  O28  1  0.485  0.723  0.871  1.0
  O  O29  1  0.525  0.877  0.161  1.0
  O  O30  1  0.425  0.117  0.801  1.0
  O  O31  1  0.935  0.898  0.135  1.0
  O  O32  1  0.095  0.059  0.912  1.0
  O  O33  1  0.141  0.240  0.415  1.0
  O  O34  1  0.807  0.773  0.711  1.0
  O  O35  1  0.690  0.640  0.139  1.0
  O  O36  1  0.392  0.379  0.781  1.0
[/CIF]
.
The material structure described by Sr6Mg(Te4O11)2 crystallizes in the triclinic P1 space group. There are six inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(17), one O(18), one O(6), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(14), one O(16), one O(17), one O(18), one O(20), one O(5), one O(7), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(17), one O(19), and one O(5) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(16), one O(18), one O(20), one O(6), and one O(9) atom. In the fifth Sr site, Sr(5) is bonded in a 7-coordinate geometry to one O(1), one O(14), one O(19), one O(2), one O(22), one O(4), and one O(9) atom. In the sixth Sr site, Sr(6) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(13), one O(2), one O(21), one O(3), and one O(4) atom. Mg(1) is bonded in a distorted see-saw-like geometry to one O(11), one O(16), one O(19), and one O(22) atom. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted trigonal non-coplanar geometry to one O(19), one O(2), and one O(5) atom. In the second Te site, Te(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(20), one O(4), and one O(6) atom. In the third Te site, Te(3) is bonded in a distorted T-shaped geometry to one O(11), one O(18), and one O(7) atom. In the fourth Te site, Te(4) is bonded in a see-saw-like geometry to one O(12), one O(17), one O(21), and one O(8) atom. In the fifth Te site, Te(5) is bonded in a distorted see-saw-like geometry to one O(14), one O(15), one O(21), and one O(6) atom. In the sixth Te site, Te(6) is bonded in a distorted trigonal non-coplanar geometry to one O(13), one O(16), and one O(22) atom. In the seventh Te site, Te(7) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(8), and one O(9) atom. In the eighth Te site, Te(8) is bonded in a 2-coordinate geometry to one O(10), one O(4), and one O(7) atom. There are twenty-two inequivalent O sites. In the first O site, O(1) is bonded to one Sr(4), one Sr(5), one Sr(6), and one Te(2) atom to form distorted OSr3Te tetrahedra that share  an edgeedge with one O(9)Sr3Te tetrahedra and  an edgeedge with one O(6)Sr2Te2 trigonal pyramid. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(5), one Sr(6), and one Te(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(6) and one Te(7) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(5), one Sr(6), one Te(2), and one Te(8) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(3), and one Te(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(4), one Te(2), and one Te(5) atom to form a mixture of distorted corner and edge-sharing OSr2Te2 trigonal pyramids. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sr(2), one Te(3), and one Te(8) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Sr(1), one Te(4), and one Te(7) atom. In the ninth O site, O(9) is bonded to one Sr(2), one Sr(4), one Sr(5), and one Te(7) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr2Te2 trigonal pyramid and  an edgeedge with one O(1)Sr3Te tetrahedra. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Sr(6), and one Te(8) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(4), one Mg(1), and one Te(3) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(4), and one Te(4) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Sr(6) and one Te(6) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Sr(2), one Sr(5), and one Te(5) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sr(3), and one Te(5) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one Mg(1), and one Te(6) atom. In the seventeenth O site, O(17) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one Te(4) atom. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), and one Te(3) atom. In the nineteenth O site, O(19) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(5), one Mg(1), and one Te(1) atom. In the twentieth O site, O(20) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(4), and one Te(2) atom. In the twenty-first O site, O(21) is bonded in a distorted trigonal non-coplanar geometry to one Sr(6), one Te(4), and one Te(5) atom. In the twenty-second O site, O(22) is bonded in a distorted T-shaped geometry to one Sr(5), one Mg(1), and one Te(6) atom. is represented by the CIF file [CIF]
data_Sr6Mg(Te4O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.969
_cell_length_b   10.048
_cell_length_c   9.924
_cell_angle_alpha   102.624
_cell_angle_beta   113.400
_cell_angle_gamma   98.756
_symmetry_Int_Tables_number   1
_cell_volume   685.790
_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
  Sr  Sr0  1  0.280  0.005  0.148  1.0
  Sr  Sr1  1  0.711  0.938  0.884  1.0
  Sr  Sr2  1  0.823  0.050  0.335  1.0
  Sr  Sr3  1  0.145  0.882  0.693  1.0
  Sr  Sr4  1  0.323  0.547  0.609  1.0
  Sr  Sr5  1  0.678  0.495  0.343  1.0
  Mg  Mg6  1  0.276  0.192  0.612  1.0
  Te  Te7  1  0.057  0.306  0.237  1.0
  Te  Te8  1  0.915  0.628  0.769  1.0
  Te  Te9  1  0.017  0.194  0.812  1.0
  Te  Te10  1  0.974  0.752  0.229  1.0
  Te  Te11  1  0.441  0.687  0.033  1.0
  Te  Te12  1  0.560  0.308  0.935  1.0
  Te  Te13  1  0.493  0.822  0.464  1.0
  Te  Te14  1  0.629  0.276  0.575  1.0
  O  O15  1  0.001  0.594  0.615  1.0
  O  O16  1  0.993  0.462  0.323  1.0
  O  O17  1  0.431  0.632  0.350  1.0
  O  O18  1  0.587  0.461  0.555  1.0
  O  O19  1  0.820  0.170  0.122  1.0
  O  O20  1  0.158  0.762  0.923  1.0
  O  O21  1  0.759  0.107  0.742  1.0
  O  O22  1  0.277  0.880  0.338  1.0
  O  O23  1  0.402  0.803  0.610  1.0
  O  O24  1  0.591  0.190  0.365  1.0
  O  O25  1  0.036  0.112  0.626  1.0
  O  O26  1  0.962  0.843  0.411  1.0
  O  O27  1  0.459  0.327  0.076  1.0
  O  O28  1  0.485  0.723  0.871  1.0
  O  O29  1  0.525  0.877  0.161  1.0
  O  O30  1  0.425  0.117  0.801  1.0
  O  O31  1  0.935  0.898  0.135  1.0
  O  O32  1  0.095  0.059  0.912  1.0
  O  O33  1  0.141  0.240  0.415  1.0
  O  O34  1  0.807  0.773  0.711  1.0
  O  O35  1  0.690  0.640  0.139  1.0
  O  O36  1  0.392  0.379  0.781  1.0
[/CIF]
.