The crystal 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 5-coordinate geometry to one O(10), one O(15), one O(17), one O(19), and one O(8) atom. In the second Sr site, Sr(2) is bonded to one O(14), one O(16), one O(17), one O(18), one O(20), one O(5), and one O(7) atom to form distorted SrO7 pentagonal bipyramids that share corners with two equivalent Mg(1)O5 trigonal bipyramids. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(17), and one O(19) 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 6-coordinate geometry to one O(1), one O(14), one O(22), one O(3), one O(4), and one O(9) atom. In the sixth Sr site, Sr(6) is bonded to one O(1), one O(10), one O(13), one O(2), one O(3), and one O(4) atom to form distorted SrO6 pentagonal pyramids that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. Mg(1) is bonded to one O(13), one O(15), one O(16), one O(18), and one O(6) atom to form MgO5 trigonal bipyramids that share corners with two equivalent Sr(2)O7 pentagonal bipyramids and  a cornercorner with one Sr(6)O6 pentagonal pyramid. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted rectangular see-saw-like geometry to one O(19), one O(2), one O(3), and one O(5) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(1), one O(20), and one O(4) atom. In the third Te site, Te(3) is bonded in a see-saw-like geometry to one O(11), one O(18), one O(22), and one O(7) atom. In the fourth Te site, Te(4) is bonded in a distorted rectangular 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 rectangular 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 rectangular see-saw-like geometry to one O(13), one O(16), one O(22), and one O(5) 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 distorted L-shaped geometry to one O(10) and one O(7) atom. There are twenty-two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(4), one Sr(5), one Sr(6), and one Te(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sr(6) and one Te(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(5), one Sr(6), one Te(1), and one Te(7) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Sr(5), one Sr(6), and one Te(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(2), one Te(1), and one Te(6) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(4), one Mg(1), and one Te(5) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Sr(2), one Te(3), and one Te(8) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), one Te(4), and one Te(7) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(4), one Sr(5), and one Te(7) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Sr(3), one Sr(6), and one Te(8) atom to form edge-sharing OSr3Te tetrahedra. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(4), and one Te(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Sr(3), one Sr(4), and one Te(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Sr(6), one Mg(1), 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 to one Sr(1), one Sr(3), one Mg(1), and one Te(5) atom to form distorted OSr2MgTe trigonal pyramids that share  a cornercorner with one O(18)Sr2MgTe trigonal pyramid and  an edgeedge with one O(10)Sr3Te tetrahedra. In the sixteenth O site, O(16) is bonded in a 2-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 distorted rectangular see-saw-like 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 to one Sr(2), one Sr(4), one Mg(1), and one Te(3) atom to form distorted corner-sharing OSr2MgTe trigonal pyramids. In the nineteenth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(3), and one Te(1) atom. In the twentieth O site, O(20) is bonded in a trigonal non-coplanar 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 bent 120 degrees geometry to one Te(4) and one Te(5) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Sr(5), one Te(3), and one Te(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr6Mg(Te4O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.635
_cell_length_b   9.838
_cell_length_c   10.057
_cell_angle_alpha   101.326
_cell_angle_beta   107.226
_cell_angle_gamma   101.739
_symmetry_Int_Tables_number   1
_cell_volume   679.318
_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  0.301  0.043  0.271  1.0
  Sr  Sr1  1  0.760  0.960  0.885  1.0
  Sr  Sr2  1  0.848  0.086  0.332  1.0
  Sr  Sr3  1  0.103  0.883  0.637  1.0
  Sr  Sr4  1  0.312  0.538  0.630  1.0
  Sr  Sr5  1  0.662  0.438  0.390  1.0
  Mg  Mg6  1  0.347  0.039  0.970  1.0
  Te  Te7  1  0.071  0.371  0.200  1.0
  Te  Te8  1  0.859  0.613  0.758  1.0
  Te  Te9  1  0.057  0.228  0.768  1.0
  Te  Te10  1  0.898  0.743  0.198  1.0
  Te  Te11  1  0.392  0.748  0.011  1.0
  Te  Te12  1  0.576  0.307  0.965  1.0
  Te  Te13  1  0.461  0.764  0.436  1.0
  Te  Te14  1  0.573  0.172  0.616  1.0
  O  O15  1  0.985  0.557  0.629  1.0
  O  O16  1  0.946  0.448  0.319  1.0
  O  O17  1  0.393  0.559  0.382  1.0
  O  O18  1  0.616  0.487  0.638  1.0
  O  O19  1  0.842  0.225  0.061  1.0
  O  O20  1  0.205  0.829  0.889  1.0
  O  O21  1  0.768  0.072  0.674  1.0
  O  O22  1  0.267  0.796  0.285  1.0
  O  O23  1  0.352  0.780  0.582  1.0
  O  O24  1  0.626  0.198  0.438  1.0
  O  O25  1  0.085  0.151  0.592  1.0
  O  O26  1  0.945  0.860  0.384  1.0
  O  O27  1  0.479  0.252  0.108  1.0
  O  O28  1  0.519  0.731  0.877  1.0
  O  O29  1  0.508  0.952  0.123  1.0
  O  O30  1  0.494  0.108  0.849  1.0
  O  O31  1  0.939  0.910  0.127  1.0
  O  O32  1  0.104  0.085  0.866  1.0
  O  O33  1  0.154  0.242  0.306  1.0
  O  O34  1  0.809  0.775  0.696  1.0
  O  O35  1  0.627  0.686  0.158  1.0
  O  O36  1  0.340  0.352  0.850  1.0
[/CIF]
.
The crystal 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 5-coordinate geometry to one O(10), one O(15), one O(17), one O(19), and one O(8) atom. In the second Sr site, Sr(2) is bonded to one O(14), one O(16), one O(17), one O(18), one O(20), one O(5), and one O(7) atom to form distorted SrO7 pentagonal bipyramids that share corners with two equivalent Mg(1)O5 trigonal bipyramids. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(15), one O(17), and one O(19) 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 6-coordinate geometry to one O(1), one O(14), one O(22), one O(3), one O(4), and one O(9) atom. In the sixth Sr site, Sr(6) is bonded to one O(1), one O(10), one O(13), one O(2), one O(3), and one O(4) atom to form distorted SrO6 pentagonal pyramids that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. Mg(1) is bonded to one O(13), one O(15), one O(16), one O(18), and one O(6) atom to form MgO5 trigonal bipyramids that share corners with two equivalent Sr(2)O7 pentagonal bipyramids and  a cornercorner with one Sr(6)O6 pentagonal pyramid. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted rectangular see-saw-like geometry to one O(19), one O(2), one O(3), and one O(5) atom. In the second Te site, Te(2) is bonded in a 3-coordinate geometry to one O(1), one O(20), and one O(4) atom. In the third Te site, Te(3) is bonded in a see-saw-like geometry to one O(11), one O(18), one O(22), and one O(7) atom. In the fourth Te site, Te(4) is bonded in a distorted rectangular 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 rectangular 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 rectangular see-saw-like geometry to one O(13), one O(16), one O(22), and one O(5) 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 distorted L-shaped geometry to one O(10) and one O(7) atom. There are twenty-two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(4), one Sr(5), one Sr(6), and one Te(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sr(6) and one Te(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(5), one Sr(6), one Te(1), and one Te(7) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Sr(5), one Sr(6), and one Te(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(2), one Te(1), and one Te(6) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sr(4), one Mg(1), and one Te(5) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Sr(2), one Te(3), and one Te(8) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), one Te(4), and one Te(7) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(4), one Sr(5), and one Te(7) atom. In the tenth O site, O(10) is bonded to one Sr(1), one Sr(3), one Sr(6), and one Te(8) atom to form edge-sharing OSr3Te tetrahedra. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(4), and one Te(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Sr(3), one Sr(4), and one Te(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Sr(6), one Mg(1), 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 to one Sr(1), one Sr(3), one Mg(1), and one Te(5) atom to form distorted OSr2MgTe trigonal pyramids that share  a cornercorner with one O(18)Sr2MgTe trigonal pyramid and  an edgeedge with one O(10)Sr3Te tetrahedra. In the sixteenth O site, O(16) is bonded in a 2-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 distorted rectangular see-saw-like 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 to one Sr(2), one Sr(4), one Mg(1), and one Te(3) atom to form distorted corner-sharing OSr2MgTe trigonal pyramids. In the nineteenth O site, O(19) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(3), and one Te(1) atom. In the twentieth O site, O(20) is bonded in a trigonal non-coplanar 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 bent 120 degrees geometry to one Te(4) and one Te(5) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Sr(5), one Te(3), and one Te(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr6Mg(Te4O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.635
_cell_length_b   9.838
_cell_length_c   10.057
_cell_angle_alpha   101.326
_cell_angle_beta   107.226
_cell_angle_gamma   101.739
_symmetry_Int_Tables_number   1
_cell_volume   679.318
_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  0.301  0.043  0.271  1.0
  Sr  Sr1  1  0.760  0.960  0.885  1.0
  Sr  Sr2  1  0.848  0.086  0.332  1.0
  Sr  Sr3  1  0.103  0.883  0.637  1.0
  Sr  Sr4  1  0.312  0.538  0.630  1.0
  Sr  Sr5  1  0.662  0.438  0.390  1.0
  Mg  Mg6  1  0.347  0.039  0.970  1.0
  Te  Te7  1  0.071  0.371  0.200  1.0
  Te  Te8  1  0.859  0.613  0.758  1.0
  Te  Te9  1  0.057  0.228  0.768  1.0
  Te  Te10  1  0.898  0.743  0.198  1.0
  Te  Te11  1  0.392  0.748  0.011  1.0
  Te  Te12  1  0.576  0.307  0.965  1.0
  Te  Te13  1  0.461  0.764  0.436  1.0
  Te  Te14  1  0.573  0.172  0.616  1.0
  O  O15  1  0.985  0.557  0.629  1.0
  O  O16  1  0.946  0.448  0.319  1.0
  O  O17  1  0.393  0.559  0.382  1.0
  O  O18  1  0.616  0.487  0.638  1.0
  O  O19  1  0.842  0.225  0.061  1.0
  O  O20  1  0.205  0.829  0.889  1.0
  O  O21  1  0.768  0.072  0.674  1.0
  O  O22  1  0.267  0.796  0.285  1.0
  O  O23  1  0.352  0.780  0.582  1.0
  O  O24  1  0.626  0.198  0.438  1.0
  O  O25  1  0.085  0.151  0.592  1.0
  O  O26  1  0.945  0.860  0.384  1.0
  O  O27  1  0.479  0.252  0.108  1.0
  O  O28  1  0.519  0.731  0.877  1.0
  O  O29  1  0.508  0.952  0.123  1.0
  O  O30  1  0.494  0.108  0.849  1.0
  O  O31  1  0.939  0.910  0.127  1.0
  O  O32  1  0.104  0.085  0.866  1.0
  O  O33  1  0.154  0.242  0.306  1.0
  O  O34  1  0.809  0.775  0.696  1.0
  O  O35  1  0.627  0.686  0.158  1.0
  O  O36  1  0.340  0.352  0.850  1.0
[/CIF]
.