The structure described by SrSn7N10 crystallizes in the monoclinic Pc space group. Sr(1) is bonded in a 4-coordinate geometry to one N(1), one N(3), one N(4), and one N(7) atom. There are seven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one N(1), one N(2), one N(3), and one N(6) atom to form a mixture of edge and corner-sharing SnN4 tetrahedra. In the second Sn site, Sn(2) is bonded to one N(2), one N(3), one N(4), and one N(6) atom to form a mixture of edge and corner-sharing SnN4 tetrahedra. In the third Sn site, Sn(3) is bonded to one N(4), one N(5), one N(7), and one N(8) atom to form corner-sharing SnN4 tetrahedra. In the fourth Sn site, Sn(4) is bonded to one N(10), one N(2), one N(7), and one N(9) atom to form corner-sharing SnN4 tetrahedra. In the fifth Sn site, Sn(5) is bonded to one N(1), one N(7), one N(8), and one N(9) atom to form corner-sharing SnN4 tetrahedra. In the sixth Sn site, Sn(6) is bonded to one N(10), one N(3), one N(5), and one N(8) atom to form corner-sharing SnN4 tetrahedra. In the seventh Sn site, Sn(7) is bonded to one N(10), one N(5), one N(6), and one N(9) atom to form corner-sharing SnN4 tetrahedra. There are ten inequivalent N sites. In the first N site, N(9) is bonded in a trigonal non-coplanar geometry to one Sn(4), one Sn(5), and one Sn(7) atom. In the second N site, N(10) is bonded in a trigonal planar geometry to one Sn(4), one Sn(6), and one Sn(7) atom. In the third N site, N(1) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sn(1), and one Sn(5) atom. In the fourth N site, N(2) is bonded in a 3-coordinate geometry to one Sn(1), one Sn(2), and one Sn(4) atom. In the fifth N site, N(3) is bonded to one Sr(1), one Sn(1), one Sn(2), and one Sn(6) atom to form corner-sharing NSrSn3 tetrahedra. In the sixth N site, N(4) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sn(2), and one Sn(3) atom. In the seventh N site, N(5) is bonded in a trigonal planar geometry to one Sn(3), one Sn(6), and one Sn(7) atom. In the eighth N site, N(6) is bonded in a trigonal planar geometry to one Sn(1), one Sn(2), and one Sn(7) atom. In the ninth N site, N(7) is bonded to one Sr(1), one Sn(3), one Sn(4), and one Sn(5) atom to form corner-sharing NSrSn3 trigonal pyramids. In the tenth N site, N(8) is bonded in a trigonal non-coplanar geometry to one Sn(3), one Sn(5), and one Sn(6) atom. is represented by the CIF file [CIF]
data_SrSn7N10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.845
_cell_length_b   8.050
_cell_length_c   11.451
_cell_angle_alpha   90.000
_cell_angle_beta   105.740
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   696.026
_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
  Sr  Sr0  1  0.969  0.972  0.679  1.0
  Sr  Sr1  1  0.969  0.028  0.179  1.0
  Sn  Sn2  1  0.542  0.970  0.822  1.0
  Sn  Sn3  1  0.542  0.030  0.322  1.0
  Sn  Sn4  1  0.342  0.024  0.017  1.0
  Sn  Sn5  1  0.342  0.976  0.517  1.0
  Sn  Sn6  1  0.114  0.394  0.071  1.0
  Sn  Sn7  1  0.114  0.606  0.571  1.0
  Sn  Sn8  1  0.666  0.351  0.997  1.0
  Sn  Sn9  1  0.666  0.649  0.497  1.0
  Sn  Sn10  1  0.844  0.620  0.812  1.0
  Sn  Sn11  1  0.844  0.380  0.312  1.0
  Sn  Sn12  1  0.301  0.624  0.881  1.0
  Sn  Sn13  1  0.301  0.376  0.381  1.0
  Sn  Sn14  1  0.488  0.364  0.687  1.0
  Sn  Sn15  1  0.488  0.636  0.187  1.0
  N  N16  1  0.765  0.861  0.806  1.0
  N  N17  1  0.765  0.139  0.306  1.0
  N  N18  1  0.577  0.111  0.982  1.0
  N  N19  1  0.577  0.889  0.482  1.0
  N  N20  1  0.303  0.878  0.856  1.0
  N  N21  1  0.303  0.122  0.356  1.0
  N  N22  1  0.126  0.149  0.029  1.0
  N  N23  1  0.126  0.851  0.529  1.0
  N  N24  1  0.290  0.506  0.722  1.0
  N  N25  1  0.290  0.494  0.222  1.0
  N  N26  1  0.423  0.119  0.674  1.0
  N  N27  1  0.423  0.881  0.174  1.0
  N  N28  1  0.893  0.360  0.138  1.0
  N  N29  1  0.893  0.640  0.638  1.0
  N  N30  1  0.081  0.585  0.945  1.0
  N  N31  1  0.081  0.415  0.445  1.0
  N  N32  1  0.713  0.401  0.829  1.0
  N  N33  1  0.713  0.599  0.329  1.0
  N  N34  1  0.507  0.544  0.023  1.0
  N  N35  1  0.507  0.456  0.523  1.0
[/CIF]
.
The structure described by SrSn7N10 crystallizes in the monoclinic Pc space group. Sr(1) is bonded in a 4-coordinate geometry to one N(1), one N(3), one N(4), and one N(7) atom. There are seven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one N(1), one N(2), one N(3), and one N(6) atom to form a mixture of edge and corner-sharing SnN4 tetrahedra. In the second Sn site, Sn(2) is bonded to one N(2), one N(3), one N(4), and one N(6) atom to form a mixture of edge and corner-sharing SnN4 tetrahedra. In the third Sn site, Sn(3) is bonded to one N(4), one N(5), one N(7), and one N(8) atom to form corner-sharing SnN4 tetrahedra. In the fourth Sn site, Sn(4) is bonded to one N(10), one N(2), one N(7), and one N(9) atom to form corner-sharing SnN4 tetrahedra. In the fifth Sn site, Sn(5) is bonded to one N(1), one N(7), one N(8), and one N(9) atom to form corner-sharing SnN4 tetrahedra. In the sixth Sn site, Sn(6) is bonded to one N(10), one N(3), one N(5), and one N(8) atom to form corner-sharing SnN4 tetrahedra. In the seventh Sn site, Sn(7) is bonded to one N(10), one N(5), one N(6), and one N(9) atom to form corner-sharing SnN4 tetrahedra. There are ten inequivalent N sites. In the first N site, N(9) is bonded in a trigonal non-coplanar geometry to one Sn(4), one Sn(5), and one Sn(7) atom. In the second N site, N(10) is bonded in a trigonal planar geometry to one Sn(4), one Sn(6), and one Sn(7) atom. In the third N site, N(1) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sn(1), and one Sn(5) atom. In the fourth N site, N(2) is bonded in a 3-coordinate geometry to one Sn(1), one Sn(2), and one Sn(4) atom. In the fifth N site, N(3) is bonded to one Sr(1), one Sn(1), one Sn(2), and one Sn(6) atom to form corner-sharing NSrSn3 tetrahedra. In the sixth N site, N(4) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sn(2), and one Sn(3) atom. In the seventh N site, N(5) is bonded in a trigonal planar geometry to one Sn(3), one Sn(6), and one Sn(7) atom. In the eighth N site, N(6) is bonded in a trigonal planar geometry to one Sn(1), one Sn(2), and one Sn(7) atom. In the ninth N site, N(7) is bonded to one Sr(1), one Sn(3), one Sn(4), and one Sn(5) atom to form corner-sharing NSrSn3 trigonal pyramids. In the tenth N site, N(8) is bonded in a trigonal non-coplanar geometry to one Sn(3), one Sn(5), and one Sn(6) atom. is represented by the CIF file [CIF]
data_SrSn7N10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.845
_cell_length_b   8.050
_cell_length_c   11.451
_cell_angle_alpha   90.000
_cell_angle_beta   105.740
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   696.026
_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
  Sr  Sr0  1  0.969  0.972  0.679  1.0
  Sr  Sr1  1  0.969  0.028  0.179  1.0
  Sn  Sn2  1  0.542  0.970  0.822  1.0
  Sn  Sn3  1  0.542  0.030  0.322  1.0
  Sn  Sn4  1  0.342  0.024  0.017  1.0
  Sn  Sn5  1  0.342  0.976  0.517  1.0
  Sn  Sn6  1  0.114  0.394  0.071  1.0
  Sn  Sn7  1  0.114  0.606  0.571  1.0
  Sn  Sn8  1  0.666  0.351  0.997  1.0
  Sn  Sn9  1  0.666  0.649  0.497  1.0
  Sn  Sn10  1  0.844  0.620  0.812  1.0
  Sn  Sn11  1  0.844  0.380  0.312  1.0
  Sn  Sn12  1  0.301  0.624  0.881  1.0
  Sn  Sn13  1  0.301  0.376  0.381  1.0
  Sn  Sn14  1  0.488  0.364  0.687  1.0
  Sn  Sn15  1  0.488  0.636  0.187  1.0
  N  N16  1  0.765  0.861  0.806  1.0
  N  N17  1  0.765  0.139  0.306  1.0
  N  N18  1  0.577  0.111  0.982  1.0
  N  N19  1  0.577  0.889  0.482  1.0
  N  N20  1  0.303  0.878  0.856  1.0
  N  N21  1  0.303  0.122  0.356  1.0
  N  N22  1  0.126  0.149  0.029  1.0
  N  N23  1  0.126  0.851  0.529  1.0
  N  N24  1  0.290  0.506  0.722  1.0
  N  N25  1  0.290  0.494  0.222  1.0
  N  N26  1  0.423  0.119  0.674  1.0
  N  N27  1  0.423  0.881  0.174  1.0
  N  N28  1  0.893  0.360  0.138  1.0
  N  N29  1  0.893  0.640  0.638  1.0
  N  N30  1  0.081  0.585  0.945  1.0
  N  N31  1  0.081  0.415  0.445  1.0
  N  N32  1  0.713  0.401  0.829  1.0
  N  N33  1  0.713  0.599  0.329  1.0
  N  N34  1  0.507  0.544  0.023  1.0
  N  N35  1  0.507  0.456  0.523  1.0
[/CIF]
.