The material described by Sr2MgTi6N2O11 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(8), two equivalent O(10), two equivalent O(11), two equivalent O(2), and two equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to one Mg(1), one N(1), two equivalent N(2), one O(4), one O(8), two equivalent O(11), and two equivalent O(9) atoms. Mg(1) is bonded in a rectangular see-saw-like geometry to one Sr(2), one O(4), one O(5), and two equivalent O(1) atoms. There are six inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one N(1), one O(1), one O(11), one O(3), and two equivalent O(4) atoms to form TiNO5 octahedra that share  a cornercorner with one Ti(6)NO5 octahedra,  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(1)NO5 octahedra,  an edgeedge with one Ti(2)NO5 octahedra, and edges with two equivalent Ti(4)N3O3 octahedra. The corner-sharing octahedral tilt angles range from 2-21°. In the second Ti site, Ti(2) is bonded to one N(1), one O(1), one O(2), one O(7), and two equivalent O(5) atoms to form TiNO5 octahedra that share corners with two equivalent Ti(2)NO5 octahedra,  an edgeedge with one Ti(1)NO5 octahedra,  an edgeedge with one Ti(3)O6 octahedra, and edges with two equivalent Ti(4)N3O3 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third Ti site, Ti(3) is bonded to one O(2), one O(3), one O(7), one O(8), and two equivalent O(6) atoms to form distorted TiO6 octahedra that share  a cornercorner with one Ti(1)NO5 octahedra, corners with two equivalent Ti(3)O6 octahedra,  an edgeedge with one Ti(2)NO5 octahedra, and edges with two equivalent Ti(6)NO5 octahedra. The corner-sharing octahedral tilt angles range from 13-28°. In the fourth Ti site, Ti(4) is bonded to one N(2), two equivalent N(1), one O(4), one O(5), and one O(9) atom to form distorted TiN3O3 octahedra that share  a cornercorner with one Ti(6)NO5 octahedra, corners with two equivalent Ti(4)N3O3 octahedra, edges with two equivalent Ti(1)NO5 octahedra, and edges with two equivalent Ti(2)NO5 octahedra. The corner-sharing octahedral tilt angles range from 4-19°. In the fifth Ti site, Ti(5) is bonded in a 6-coordinate geometry to one O(10), one O(5), one O(6), one O(9), and two equivalent O(7) atoms. In the sixth Ti site, Ti(6) is bonded to one N(2), one O(10), one O(11), one O(6), and two equivalent O(8) atoms to form distorted TiNO5 octahedra that share  a cornercorner with one Ti(4)N3O3 octahedra,  a cornercorner with one Ti(1)NO5 octahedra, corners with two equivalent Ti(6)NO5 octahedra, and edges with two equivalent Ti(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-15°. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to one Sr(2), one Ti(1), one Ti(2), and two equivalent Ti(4) atoms. In the second N site, N(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(2), one Ti(4), and one Ti(6) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1), one Ti(1), and one Ti(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ti(2), and one Ti(3) atom. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent Sr(1), one Ti(1), and one Ti(3) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one Mg(1), one Ti(4), and two equivalent Ti(1) atoms. In the fifth O site, O(5) is bonded to one Mg(1), one Ti(4), one Ti(5), and two equivalent Ti(2) atoms to form OMgTi4 square pyramids that share corners with two equivalent O(5)MgTi4 square pyramids,  a cornercorner with one O(10)Sr2Ti2 trigonal pyramid,  a cornercorner with one O(6)Ti4 trigonal pyramid, and edges with two equivalent O(7)Ti4 trigonal pyramids. In the sixth O site, O(6) is bonded to one Ti(5), one Ti(6), and two equivalent Ti(3) atoms to form OTi4 trigonal pyramids that share  a cornercorner with one O(5)MgTi4 square pyramid, corners with two equivalent O(6)Ti4 trigonal pyramids, edges with two equivalent O(8)Sr2Ti3 trigonal bipyramids,  an edgeedge with one O(10)Sr2Ti2 trigonal pyramid, and edges with two equivalent O(7)Ti4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Ti(2), one Ti(3), and two equivalent Ti(5) atoms to form distorted OTi4 trigonal pyramids that share  a cornercorner with one O(8)Sr2Ti3 trigonal bipyramid, corners with two equivalent O(10)Sr2Ti2 trigonal pyramids, corners with two equivalent O(7)Ti4 trigonal pyramids, edges with two equivalent O(5)MgTi4 square pyramids, and edges with two equivalent O(6)Ti4 trigonal pyramids. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(2), one Ti(3), and two equivalent Ti(6) atoms to form distorted OSr2Ti3 trigonal bipyramids that share corners with two equivalent O(8)Sr2Ti3 trigonal bipyramids,  a cornercorner with one O(7)Ti4 trigonal pyramid, edges with two equivalent O(10)Sr2Ti2 trigonal pyramids, and edges with two equivalent O(6)Ti4 trigonal pyramids. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Sr(2), one Ti(4), and one Ti(5) atom. In the tenth O site, O(10) is bonded to two equivalent Sr(1), one Ti(5), and one Ti(6) atom to form distorted OSr2Ti2 trigonal pyramids that share  a cornercorner with one O(5)MgTi4 square pyramid, corners with two equivalent O(10)Sr2Ti2 trigonal pyramids, corners with two equivalent O(7)Ti4 trigonal pyramids, edges with two equivalent O(8)Sr2Ti3 trigonal bipyramids, and  an edgeedge with one O(6)Ti4 trigonal pyramid. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Ti(1), and one Ti(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2MgTi6N2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.959
_cell_length_b   7.927
_cell_length_c   9.175
_cell_angle_alpha   86.578
_cell_angle_beta   89.701
_cell_angle_gamma   74.275
_symmetry_Int_Tables_number   1
_cell_volume   276.683
_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  0.569  0.903  0.787  1.0
  Sr  Sr1  1  0.423  0.185  0.164  1.0
  Mg  Mg2  1  0.553  0.852  0.362  1.0
  Ti  Ti3  1  0.111  0.764  0.110  1.0
  Ti  Ti4  1  0.189  0.605  0.446  1.0
  Ti  Ti5  1  0.240  0.513  0.773  1.0
  Ti  Ti6  1  0.749  0.503  0.218  1.0
  Ti  Ti7  1  0.851  0.307  0.552  1.0
  Ti  Ti8  1  0.885  0.240  0.895  1.0
  N  N9  1  0.231  0.537  0.240  1.0
  N  N10  1  0.822  0.363  0.060  1.0
  O  O11  1  0.045  0.868  0.340  1.0
  O  O12  1  0.127  0.714  0.642  1.0
  O  O13  1  0.157  0.663  0.927  1.0
  O  O14  1  0.602  0.777  0.148  1.0
  O  O15  1  0.689  0.606  0.445  1.0
  O  O16  1  0.768  0.458  0.747  1.0
  O  O17  1  0.315  0.374  0.565  1.0
  O  O18  1  0.382  0.244  0.866  1.0
  O  O19  1  0.878  0.268  0.355  1.0
  O  O20  1  0.960  0.108  0.667  1.0
  O  O21  1  0.993  0.007  0.996  1.0
[/CIF]
.
The material described by Sr2MgTi6N2O11 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(8), two equivalent O(10), two equivalent O(11), two equivalent O(2), and two equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to one Mg(1), one N(1), two equivalent N(2), one O(4), one O(8), two equivalent O(11), and two equivalent O(9) atoms. Mg(1) is bonded in a rectangular see-saw-like geometry to one Sr(2), one O(4), one O(5), and two equivalent O(1) atoms. There are six inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one N(1), one O(1), one O(11), one O(3), and two equivalent O(4) atoms to form TiNO5 octahedra that share  a cornercorner with one Ti(6)NO5 octahedra,  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(1)NO5 octahedra,  an edgeedge with one Ti(2)NO5 octahedra, and edges with two equivalent Ti(4)N3O3 octahedra. The corner-sharing octahedral tilt angles range from 2-21°. In the second Ti site, Ti(2) is bonded to one N(1), one O(1), one O(2), one O(7), and two equivalent O(5) atoms to form TiNO5 octahedra that share corners with two equivalent Ti(2)NO5 octahedra,  an edgeedge with one Ti(1)NO5 octahedra,  an edgeedge with one Ti(3)O6 octahedra, and edges with two equivalent Ti(4)N3O3 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third Ti site, Ti(3) is bonded to one O(2), one O(3), one O(7), one O(8), and two equivalent O(6) atoms to form distorted TiO6 octahedra that share  a cornercorner with one Ti(1)NO5 octahedra, corners with two equivalent Ti(3)O6 octahedra,  an edgeedge with one Ti(2)NO5 octahedra, and edges with two equivalent Ti(6)NO5 octahedra. The corner-sharing octahedral tilt angles range from 13-28°. In the fourth Ti site, Ti(4) is bonded to one N(2), two equivalent N(1), one O(4), one O(5), and one O(9) atom to form distorted TiN3O3 octahedra that share  a cornercorner with one Ti(6)NO5 octahedra, corners with two equivalent Ti(4)N3O3 octahedra, edges with two equivalent Ti(1)NO5 octahedra, and edges with two equivalent Ti(2)NO5 octahedra. The corner-sharing octahedral tilt angles range from 4-19°. In the fifth Ti site, Ti(5) is bonded in a 6-coordinate geometry to one O(10), one O(5), one O(6), one O(9), and two equivalent O(7) atoms. In the sixth Ti site, Ti(6) is bonded to one N(2), one O(10), one O(11), one O(6), and two equivalent O(8) atoms to form distorted TiNO5 octahedra that share  a cornercorner with one Ti(4)N3O3 octahedra,  a cornercorner with one Ti(1)NO5 octahedra, corners with two equivalent Ti(6)NO5 octahedra, and edges with two equivalent Ti(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-15°. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 4-coordinate geometry to one Sr(2), one Ti(1), one Ti(2), and two equivalent Ti(4) atoms. In the second N site, N(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(2), one Ti(4), and one Ti(6) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1), one Ti(1), and one Ti(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Ti(2), and one Ti(3) atom. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent Sr(1), one Ti(1), and one Ti(3) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one Mg(1), one Ti(4), and two equivalent Ti(1) atoms. In the fifth O site, O(5) is bonded to one Mg(1), one Ti(4), one Ti(5), and two equivalent Ti(2) atoms to form OMgTi4 square pyramids that share corners with two equivalent O(5)MgTi4 square pyramids,  a cornercorner with one O(10)Sr2Ti2 trigonal pyramid,  a cornercorner with one O(6)Ti4 trigonal pyramid, and edges with two equivalent O(7)Ti4 trigonal pyramids. In the sixth O site, O(6) is bonded to one Ti(5), one Ti(6), and two equivalent Ti(3) atoms to form OTi4 trigonal pyramids that share  a cornercorner with one O(5)MgTi4 square pyramid, corners with two equivalent O(6)Ti4 trigonal pyramids, edges with two equivalent O(8)Sr2Ti3 trigonal bipyramids,  an edgeedge with one O(10)Sr2Ti2 trigonal pyramid, and edges with two equivalent O(7)Ti4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Ti(2), one Ti(3), and two equivalent Ti(5) atoms to form distorted OTi4 trigonal pyramids that share  a cornercorner with one O(8)Sr2Ti3 trigonal bipyramid, corners with two equivalent O(10)Sr2Ti2 trigonal pyramids, corners with two equivalent O(7)Ti4 trigonal pyramids, edges with two equivalent O(5)MgTi4 square pyramids, and edges with two equivalent O(6)Ti4 trigonal pyramids. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(2), one Ti(3), and two equivalent Ti(6) atoms to form distorted OSr2Ti3 trigonal bipyramids that share corners with two equivalent O(8)Sr2Ti3 trigonal bipyramids,  a cornercorner with one O(7)Ti4 trigonal pyramid, edges with two equivalent O(10)Sr2Ti2 trigonal pyramids, and edges with two equivalent O(6)Ti4 trigonal pyramids. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Sr(2), one Ti(4), and one Ti(5) atom. In the tenth O site, O(10) is bonded to two equivalent Sr(1), one Ti(5), and one Ti(6) atom to form distorted OSr2Ti2 trigonal pyramids that share  a cornercorner with one O(5)MgTi4 square pyramid, corners with two equivalent O(10)Sr2Ti2 trigonal pyramids, corners with two equivalent O(7)Ti4 trigonal pyramids, edges with two equivalent O(8)Sr2Ti3 trigonal bipyramids, and  an edgeedge with one O(6)Ti4 trigonal pyramid. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent Sr(2), one Ti(1), and one Ti(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2MgTi6N2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.959
_cell_length_b   7.927
_cell_length_c   9.175
_cell_angle_alpha   86.578
_cell_angle_beta   89.701
_cell_angle_gamma   74.275
_symmetry_Int_Tables_number   1
_cell_volume   276.683
_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  0.569  0.903  0.787  1.0
  Sr  Sr1  1  0.423  0.185  0.164  1.0
  Mg  Mg2  1  0.553  0.852  0.362  1.0
  Ti  Ti3  1  0.111  0.764  0.110  1.0
  Ti  Ti4  1  0.189  0.605  0.446  1.0
  Ti  Ti5  1  0.240  0.513  0.773  1.0
  Ti  Ti6  1  0.749  0.503  0.218  1.0
  Ti  Ti7  1  0.851  0.307  0.552  1.0
  Ti  Ti8  1  0.885  0.240  0.895  1.0
  N  N9  1  0.231  0.537  0.240  1.0
  N  N10  1  0.822  0.363  0.060  1.0
  O  O11  1  0.045  0.868  0.340  1.0
  O  O12  1  0.127  0.714  0.642  1.0
  O  O13  1  0.157  0.663  0.927  1.0
  O  O14  1  0.602  0.777  0.148  1.0
  O  O15  1  0.689  0.606  0.445  1.0
  O  O16  1  0.768  0.458  0.747  1.0
  O  O17  1  0.315  0.374  0.565  1.0
  O  O18  1  0.382  0.244  0.866  1.0
  O  O19  1  0.878  0.268  0.355  1.0
  O  O20  1  0.960  0.108  0.667  1.0
  O  O21  1  0.993  0.007  0.996  1.0
[/CIF]
.