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 9-coordinate geometry to one O(10), one O(13), one O(15), one O(16), one O(17), one O(18), one O(19), 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(15), one O(16), one O(17), one O(18), one O(20), 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 7-coordinate geometry to 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(2), one O(22), one O(3), 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(4), and one O(5) atom. Mg(1) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(12), one O(20), one O(21), and one O(3) atom. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted T-shaped 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 T-shaped geometry to one O(1), one O(20), and one O(6) atom. In the third Te site, Te(3) is bonded in a rectangular 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 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 3-coordinate 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 T-shaped geometry to one O(3), one O(8), and one O(9) atom. In the eighth Te site, Te(8) is bonded in a 4-coordinate geometry to one O(10), one O(19), one O(4), 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(5), one Sr(6), one Mg(1), and one Te(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar 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 trigonal non-coplanar geometry to one Sr(5), one Mg(1), and one Te(7) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sr(5), one Sr(6), and one Te(8) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(6), and one Te(1) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(4), one Te(2), and one Te(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sr(2), one Te(3), and one Te(8) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar 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(12)Sr2MgTe tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra, and corners with two equivalent O(20)Sr2MgTe tetrahedra. 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 distorted OSr3Te tetrahedra that share  a cornercorner with one O(12)Sr2MgTe tetrahedra,  a cornercorner with one O(19)Sr2Te2 tetrahedra, corners with two equivalent O(17)Sr3Te tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid,  an edgeedge with one O(19)Sr2Te2 tetrahedra, and  an edgeedge with one O(15)Sr3Te tetrahedra. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Sr(3), one Sr(4), and one Te(3) atom. In the twelfth O site, O(12) is bonded to one Sr(3), one Sr(4), one Mg(1), and one Te(4) atom to form distorted OSr2MgTe tetrahedra that share  a cornercorner with one O(19)Sr2Te2 tetrahedra,  a cornercorner with one O(10)Sr3Te tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(9)Sr3Te tetrahedra,  an edgeedge with one O(20)Sr2MgTe tetrahedra,  an edgeedge with one O(17)Sr3Te tetrahedra, and  an edgeedge with one O(21)SrMgTe2 trigonal pyramid. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(6), and one Te(6) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar 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(2), one Sr(3), and one Te(5) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(12)Sr2MgTe tetrahedra,  a cornercorner with one O(20)Sr2MgTe tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra,  a cornercorner with one O(9)Sr3Te tetrahedra, corners with two equivalent O(19)Sr2Te2 tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid,  an edgeedge with one O(10)Sr3Te tetrahedra, and  an edgeedge with one O(17)Sr3Te tetrahedra. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), and one Te(6) atom. In the seventeenth O site, O(17) is bonded to one Sr(1), one Sr(2), one Sr(3), and one Te(4) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(20)Sr2MgTe tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(9)Sr3Te tetrahedra, corners with two equivalent O(10)Sr3Te tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid,  an edgeedge with one O(12)Sr2MgTe tetrahedra,  an edgeedge with one O(19)Sr2Te2 tetrahedra, and  an edgeedge with one O(15)Sr3Te tetrahedra. 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 to one Sr(1), one Sr(3), one Te(1), and one Te(8) atom to form distorted OSr2Te2 tetrahedra that share  a cornercorner with one O(12)Sr2MgTe tetrahedra,  a cornercorner with one O(10)Sr3Te tetrahedra, corners with two equivalent O(15)Sr3Te tetrahedra,  an edgeedge with one O(10)Sr3Te tetrahedra, and  an edgeedge with one O(17)Sr3Te tetrahedra. In the twentieth O site, O(20) is bonded to one Sr(2), one Sr(4), one Mg(1), and one Te(2) atom to form distorted OSr2MgTe tetrahedra that share  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra, corners with two equivalent O(9)Sr3Te tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid, and  an edgeedge with one O(12)Sr2MgTe tetrahedra. In the twenty-first O site, O(21) is bonded to one Sr(6), one Mg(1), one Te(4), and one Te(5) atom to form distorted OSrMgTe2 trigonal pyramids that share  a cornercorner with one O(20)Sr2MgTe tetrahedra,  a cornercorner with one O(10)Sr3Te tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra, and  an edgeedge with one O(12)Sr2MgTe tetrahedra. In the twenty-second O site, O(22) is bonded in a trigonal planar geometry to one Sr(5), one Te(3), and one Te(6) atom. is represented by the CIF card [CIF]
data_Sr6Mg(Te4O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.613
_cell_length_b   9.925
_cell_length_c   9.335
_cell_angle_alpha   93.746
_cell_angle_beta   107.962
_cell_angle_gamma   98.618
_symmetry_Int_Tables_number   1
_cell_volume   658.650
_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  0.287  0.036  0.113  1.0
  Sr  Sr1  1  0.701  0.932  0.878  1.0
  Sr  Sr2  1  0.843  0.052  0.310  1.0
  Sr  Sr3  1  0.171  0.949  0.701  1.0
  Sr  Sr4  1  0.349  0.550  0.619  1.0
  Sr  Sr5  1  0.705  0.409  0.340  1.0
  Mg  Mg6  1  0.792  0.717  0.480  1.0
  Te  Te7  1  0.078  0.340  0.200  1.0
  Te  Te8  1  0.982  0.638  0.796  1.0
  Te  Te9  1  0.973  0.237  0.747  1.0
  Te  Te10  1  0.986  0.744  0.230  1.0
  Te  Te11  1  0.457  0.707  0.067  1.0
  Te  Te12  1  0.501  0.295  0.929  1.0
  Te  Te13  1  0.487  0.866  0.472  1.0
  Te  Te14  1  0.467  0.188  0.523  1.0
  O  O15  1  0.922  0.567  0.579  1.0
  O  O16  1  0.085  0.453  0.372  1.0
  O  O17  1  0.515  0.673  0.452  1.0
  O  O18  1  0.537  0.381  0.540  1.0
  O  O19  1  0.821  0.259  0.155  1.0
  O  O20  1  0.212  0.787  0.926  1.0
  O  O21  1  0.686  0.153  0.694  1.0
  O  O22  1  0.278  0.835  0.280  1.0
  O  O23  1  0.412  0.829  0.649  1.0
  O  O24  1  0.573  0.156  0.365  1.0
  O  O25  1  0.991  0.129  0.581  1.0
  O  O26  1  0.993  0.840  0.421  1.0
  O  O27  1  0.431  0.322  0.103  1.0
  O  O28  1  0.543  0.673  0.902  1.0
  O  O29  1  0.560  0.896  0.121  1.0
  O  O30  1  0.444  0.100  0.900  1.0
  O  O31  1  0.939  0.894  0.117  1.0
  O  O32  1  0.024  0.109  0.889  1.0
  O  O33  1  0.170  0.187  0.290  1.0
  O  O34  1  0.881  0.799  0.712  1.0
  O  O35  1  0.721  0.656  0.233  1.0
  O  O36  1  0.275  0.332  0.782  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 9-coordinate geometry to one O(10), one O(13), one O(15), one O(16), one O(17), one O(18), one O(19), 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(15), one O(16), one O(17), one O(18), one O(20), 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 7-coordinate geometry to 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(2), one O(22), one O(3), 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(4), and one O(5) atom. Mg(1) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(12), one O(20), one O(21), and one O(3) atom. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted T-shaped 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 T-shaped geometry to one O(1), one O(20), and one O(6) atom. In the third Te site, Te(3) is bonded in a rectangular 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 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 3-coordinate 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 T-shaped geometry to one O(3), one O(8), and one O(9) atom. In the eighth Te site, Te(8) is bonded in a 4-coordinate geometry to one O(10), one O(19), one O(4), 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(5), one Sr(6), one Mg(1), and one Te(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar 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 trigonal non-coplanar geometry to one Sr(5), one Mg(1), and one Te(7) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sr(5), one Sr(6), and one Te(8) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(3), one Sr(6), and one Te(1) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one Sr(1), one Sr(4), one Te(2), and one Te(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sr(2), one Te(3), and one Te(8) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar 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(12)Sr2MgTe tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra, and corners with two equivalent O(20)Sr2MgTe tetrahedra. 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 distorted OSr3Te tetrahedra that share  a cornercorner with one O(12)Sr2MgTe tetrahedra,  a cornercorner with one O(19)Sr2Te2 tetrahedra, corners with two equivalent O(17)Sr3Te tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid,  an edgeedge with one O(19)Sr2Te2 tetrahedra, and  an edgeedge with one O(15)Sr3Te tetrahedra. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Sr(3), one Sr(4), and one Te(3) atom. In the twelfth O site, O(12) is bonded to one Sr(3), one Sr(4), one Mg(1), and one Te(4) atom to form distorted OSr2MgTe tetrahedra that share  a cornercorner with one O(19)Sr2Te2 tetrahedra,  a cornercorner with one O(10)Sr3Te tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(9)Sr3Te tetrahedra,  an edgeedge with one O(20)Sr2MgTe tetrahedra,  an edgeedge with one O(17)Sr3Te tetrahedra, and  an edgeedge with one O(21)SrMgTe2 trigonal pyramid. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(6), and one Te(6) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar 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(2), one Sr(3), and one Te(5) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(12)Sr2MgTe tetrahedra,  a cornercorner with one O(20)Sr2MgTe tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra,  a cornercorner with one O(9)Sr3Te tetrahedra, corners with two equivalent O(19)Sr2Te2 tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid,  an edgeedge with one O(10)Sr3Te tetrahedra, and  an edgeedge with one O(17)Sr3Te tetrahedra. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), and one Te(6) atom. In the seventeenth O site, O(17) is bonded to one Sr(1), one Sr(2), one Sr(3), and one Te(4) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(20)Sr2MgTe tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(9)Sr3Te tetrahedra, corners with two equivalent O(10)Sr3Te tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid,  an edgeedge with one O(12)Sr2MgTe tetrahedra,  an edgeedge with one O(19)Sr2Te2 tetrahedra, and  an edgeedge with one O(15)Sr3Te tetrahedra. 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 to one Sr(1), one Sr(3), one Te(1), and one Te(8) atom to form distorted OSr2Te2 tetrahedra that share  a cornercorner with one O(12)Sr2MgTe tetrahedra,  a cornercorner with one O(10)Sr3Te tetrahedra, corners with two equivalent O(15)Sr3Te tetrahedra,  an edgeedge with one O(10)Sr3Te tetrahedra, and  an edgeedge with one O(17)Sr3Te tetrahedra. In the twentieth O site, O(20) is bonded to one Sr(2), one Sr(4), one Mg(1), and one Te(2) atom to form distorted OSr2MgTe tetrahedra that share  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra, corners with two equivalent O(9)Sr3Te tetrahedra,  a cornercorner with one O(21)SrMgTe2 trigonal pyramid, and  an edgeedge with one O(12)Sr2MgTe tetrahedra. In the twenty-first O site, O(21) is bonded to one Sr(6), one Mg(1), one Te(4), and one Te(5) atom to form distorted OSrMgTe2 trigonal pyramids that share  a cornercorner with one O(20)Sr2MgTe tetrahedra,  a cornercorner with one O(10)Sr3Te tetrahedra,  a cornercorner with one O(15)Sr3Te tetrahedra,  a cornercorner with one O(17)Sr3Te tetrahedra, and  an edgeedge with one O(12)Sr2MgTe tetrahedra. In the twenty-second O site, O(22) is bonded in a trigonal planar geometry to one Sr(5), one Te(3), and one Te(6) atom. is represented by the CIF card [CIF]
data_Sr6Mg(Te4O11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.613
_cell_length_b   9.925
_cell_length_c   9.335
_cell_angle_alpha   93.746
_cell_angle_beta   107.962
_cell_angle_gamma   98.618
_symmetry_Int_Tables_number   1
_cell_volume   658.650
_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  0.287  0.036  0.113  1.0
  Sr  Sr1  1  0.701  0.932  0.878  1.0
  Sr  Sr2  1  0.843  0.052  0.310  1.0
  Sr  Sr3  1  0.171  0.949  0.701  1.0
  Sr  Sr4  1  0.349  0.550  0.619  1.0
  Sr  Sr5  1  0.705  0.409  0.340  1.0
  Mg  Mg6  1  0.792  0.717  0.480  1.0
  Te  Te7  1  0.078  0.340  0.200  1.0
  Te  Te8  1  0.982  0.638  0.796  1.0
  Te  Te9  1  0.973  0.237  0.747  1.0
  Te  Te10  1  0.986  0.744  0.230  1.0
  Te  Te11  1  0.457  0.707  0.067  1.0
  Te  Te12  1  0.501  0.295  0.929  1.0
  Te  Te13  1  0.487  0.866  0.472  1.0
  Te  Te14  1  0.467  0.188  0.523  1.0
  O  O15  1  0.922  0.567  0.579  1.0
  O  O16  1  0.085  0.453  0.372  1.0
  O  O17  1  0.515  0.673  0.452  1.0
  O  O18  1  0.537  0.381  0.540  1.0
  O  O19  1  0.821  0.259  0.155  1.0
  O  O20  1  0.212  0.787  0.926  1.0
  O  O21  1  0.686  0.153  0.694  1.0
  O  O22  1  0.278  0.835  0.280  1.0
  O  O23  1  0.412  0.829  0.649  1.0
  O  O24  1  0.573  0.156  0.365  1.0
  O  O25  1  0.991  0.129  0.581  1.0
  O  O26  1  0.993  0.840  0.421  1.0
  O  O27  1  0.431  0.322  0.103  1.0
  O  O28  1  0.543  0.673  0.902  1.0
  O  O29  1  0.560  0.896  0.121  1.0
  O  O30  1  0.444  0.100  0.900  1.0
  O  O31  1  0.939  0.894  0.117  1.0
  O  O32  1  0.024  0.109  0.889  1.0
  O  O33  1  0.170  0.187  0.290  1.0
  O  O34  1  0.881  0.799  0.712  1.0
  O  O35  1  0.721  0.656  0.233  1.0
  O  O36  1  0.275  0.332  0.782  1.0
[/CIF]
.