The material structure described by Sr11(CN5)2 crystallizes in the tetragonal P4_2/mnm space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent N(4) and four equivalent N(1) atoms to form a mixture of corner and edge-sharing SrN6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one N(1), two equivalent N(2), and two equivalent N(4) atoms. In the third Sr site, Sr(3) is bonded to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms to form SrN6 octahedra that share corners with two equivalent Sr(1)N6 octahedra, corners with two equivalent Sr(4)N4 trigonal pyramids,  an edgeedge with one Sr(1)N6 octahedra, edges with two equivalent Sr(3)N6 octahedra, and edges with four equivalent Sr(4)N4 trigonal pyramids. The corner-sharing octahedral tilt angles are 4°. In the fourth Sr site, Sr(4) is bonded to one N(3) and three equivalent N(2) atoms to form distorted SrN4 trigonal pyramids that share  a cornercorner with one Sr(3)N6 octahedra, corners with seven equivalent Sr(4)N4 trigonal pyramids, and edges with two equivalent Sr(3)N6 octahedra. The corner-sharing octahedral tilt angles are 17°. C(1) is bonded in a linear geometry to one N(3) and one N(4) atom. There are four inequivalent N sites. In the first N site, N(3) is bonded in a 5-coordinate geometry to two equivalent Sr(3), two equivalent Sr(4), and one C(1) atom. In the second N site, N(4) is bonded to one Sr(1), four equivalent Sr(2), and one C(1) atom to form distorted NSr5C octahedra that share  a cornercorner with one N(4)Sr5C octahedra, corners with four equivalent N(2)Sr6 octahedra, edges with two equivalent N(4)Sr5C octahedra, edges with two equivalent N(2)Sr6 octahedra, and edges with four equivalent N(1)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 0-19°. In the third N site, N(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Sr(3) atoms to form NSr6 octahedra that share corners with two equivalent N(1)Sr6 octahedra, edges with three equivalent N(1)Sr6 octahedra, edges with four equivalent N(4)Sr5C octahedra, and edges with four equivalent N(2)Sr6 octahedra. The corner-sharing octahedra are not tilted. In the fourth N site, N(2) is bonded to one Sr(3), two equivalent Sr(2), and three equivalent Sr(4) atoms to form distorted NSr6 octahedra that share corners with two equivalent N(4)Sr5C octahedra, corners with five equivalent N(2)Sr6 octahedra,  an edgeedge with one N(4)Sr5C octahedra, edges with two equivalent N(1)Sr6 octahedra, and edges with two equivalent N(2)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 0-53°. is represented by the CIF card [CIF]
data_Sr11(CN5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.507
_cell_length_b   15.507
_cell_length_c   3.888
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   934.862
_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  0.500  0.500  0.500  1.0
  Sr  Sr1  1  0.000  0.000  0.000  1.0
  Sr  Sr2  1  0.980  0.795  0.500  1.0
  Sr  Sr3  1  0.020  0.205  0.500  1.0
  Sr  Sr4  1  0.520  0.295  0.000  1.0
  Sr  Sr5  1  0.480  0.705  0.000  1.0
  Sr  Sr6  1  0.795  0.980  0.500  1.0
  Sr  Sr7  1  0.205  0.020  0.500  1.0
  Sr  Sr8  1  0.295  0.520  0.000  1.0
  Sr  Sr9  1  0.705  0.480  0.000  1.0
  Sr  Sr10  1  0.671  0.671  0.500  1.0
  Sr  Sr11  1  0.329  0.329  0.500  1.0
  Sr  Sr12  1  0.829  0.171  0.000  1.0
  Sr  Sr13  1  0.171  0.829  0.000  1.0
  Sr  Sr14  1  0.382  0.889  0.500  1.0
  Sr  Sr15  1  0.618  0.111  0.500  1.0
  Sr  Sr16  1  0.118  0.389  0.000  1.0
  Sr  Sr17  1  0.882  0.611  0.000  1.0
  Sr  Sr18  1  0.889  0.382  0.500  1.0
  Sr  Sr19  1  0.111  0.618  0.500  1.0
  Sr  Sr20  1  0.389  0.118  0.000  1.0
  Sr  Sr21  1  0.611  0.882  0.000  1.0
  C  C22  1  0.318  0.682  0.500  1.0
  C  C23  1  0.682  0.318  0.500  1.0
  C  C24  1  0.182  0.182  0.000  1.0
  C  C25  1  0.818  0.818  0.000  1.0
  N  N26  1  0.091  0.909  0.500  1.0
  N  N27  1  0.909  0.091  0.500  1.0
  N  N28  1  0.409  0.409  0.000  1.0
  N  N29  1  0.591  0.591  0.000  1.0
  N  N30  1  0.468  0.190  0.500  1.0
  N  N31  1  0.532  0.810  0.500  1.0
  N  N32  1  0.032  0.690  0.000  1.0
  N  N33  1  0.968  0.310  0.000  1.0
  N  N34  1  0.190  0.468  0.500  1.0
  N  N35  1  0.810  0.532  0.500  1.0
  N  N36  1  0.690  0.032  0.000  1.0
  N  N37  1  0.310  0.968  0.000  1.0
  N  N38  1  0.262  0.738  0.500  1.0
  N  N39  1  0.738  0.262  0.500  1.0
  N  N40  1  0.238  0.238  0.000  1.0
  N  N41  1  0.762  0.762  0.000  1.0
  N  N42  1  0.375  0.625  0.500  1.0
  N  N43  1  0.625  0.375  0.500  1.0
  N  N44  1  0.125  0.125  0.000  1.0
  N  N45  1  0.875  0.875  0.000  1.0
[/CIF]
.
The material structure described by Sr11(CN5)2 crystallizes in the tetragonal P4_2/mnm space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent N(4) and four equivalent N(1) atoms to form a mixture of corner and edge-sharing SrN6 octahedra. The corner-sharing octahedral tilt angles are 4°. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one N(1), two equivalent N(2), and two equivalent N(4) atoms. In the third Sr site, Sr(3) is bonded to two equivalent N(1), two equivalent N(2), and two equivalent N(3) atoms to form SrN6 octahedra that share corners with two equivalent Sr(1)N6 octahedra, corners with two equivalent Sr(4)N4 trigonal pyramids,  an edgeedge with one Sr(1)N6 octahedra, edges with two equivalent Sr(3)N6 octahedra, and edges with four equivalent Sr(4)N4 trigonal pyramids. The corner-sharing octahedral tilt angles are 4°. In the fourth Sr site, Sr(4) is bonded to one N(3) and three equivalent N(2) atoms to form distorted SrN4 trigonal pyramids that share  a cornercorner with one Sr(3)N6 octahedra, corners with seven equivalent Sr(4)N4 trigonal pyramids, and edges with two equivalent Sr(3)N6 octahedra. The corner-sharing octahedral tilt angles are 17°. C(1) is bonded in a linear geometry to one N(3) and one N(4) atom. There are four inequivalent N sites. In the first N site, N(3) is bonded in a 5-coordinate geometry to two equivalent Sr(3), two equivalent Sr(4), and one C(1) atom. In the second N site, N(4) is bonded to one Sr(1), four equivalent Sr(2), and one C(1) atom to form distorted NSr5C octahedra that share  a cornercorner with one N(4)Sr5C octahedra, corners with four equivalent N(2)Sr6 octahedra, edges with two equivalent N(4)Sr5C octahedra, edges with two equivalent N(2)Sr6 octahedra, and edges with four equivalent N(1)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 0-19°. In the third N site, N(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Sr(3) atoms to form NSr6 octahedra that share corners with two equivalent N(1)Sr6 octahedra, edges with three equivalent N(1)Sr6 octahedra, edges with four equivalent N(4)Sr5C octahedra, and edges with four equivalent N(2)Sr6 octahedra. The corner-sharing octahedra are not tilted. In the fourth N site, N(2) is bonded to one Sr(3), two equivalent Sr(2), and three equivalent Sr(4) atoms to form distorted NSr6 octahedra that share corners with two equivalent N(4)Sr5C octahedra, corners with five equivalent N(2)Sr6 octahedra,  an edgeedge with one N(4)Sr5C octahedra, edges with two equivalent N(1)Sr6 octahedra, and edges with two equivalent N(2)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 0-53°. is represented by the CIF card [CIF]
data_Sr11(CN5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.507
_cell_length_b   15.507
_cell_length_c   3.888
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   934.862
_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  0.500  0.500  0.500  1.0
  Sr  Sr1  1  0.000  0.000  0.000  1.0
  Sr  Sr2  1  0.980  0.795  0.500  1.0
  Sr  Sr3  1  0.020  0.205  0.500  1.0
  Sr  Sr4  1  0.520  0.295  0.000  1.0
  Sr  Sr5  1  0.480  0.705  0.000  1.0
  Sr  Sr6  1  0.795  0.980  0.500  1.0
  Sr  Sr7  1  0.205  0.020  0.500  1.0
  Sr  Sr8  1  0.295  0.520  0.000  1.0
  Sr  Sr9  1  0.705  0.480  0.000  1.0
  Sr  Sr10  1  0.671  0.671  0.500  1.0
  Sr  Sr11  1  0.329  0.329  0.500  1.0
  Sr  Sr12  1  0.829  0.171  0.000  1.0
  Sr  Sr13  1  0.171  0.829  0.000  1.0
  Sr  Sr14  1  0.382  0.889  0.500  1.0
  Sr  Sr15  1  0.618  0.111  0.500  1.0
  Sr  Sr16  1  0.118  0.389  0.000  1.0
  Sr  Sr17  1  0.882  0.611  0.000  1.0
  Sr  Sr18  1  0.889  0.382  0.500  1.0
  Sr  Sr19  1  0.111  0.618  0.500  1.0
  Sr  Sr20  1  0.389  0.118  0.000  1.0
  Sr  Sr21  1  0.611  0.882  0.000  1.0
  C  C22  1  0.318  0.682  0.500  1.0
  C  C23  1  0.682  0.318  0.500  1.0
  C  C24  1  0.182  0.182  0.000  1.0
  C  C25  1  0.818  0.818  0.000  1.0
  N  N26  1  0.091  0.909  0.500  1.0
  N  N27  1  0.909  0.091  0.500  1.0
  N  N28  1  0.409  0.409  0.000  1.0
  N  N29  1  0.591  0.591  0.000  1.0
  N  N30  1  0.468  0.190  0.500  1.0
  N  N31  1  0.532  0.810  0.500  1.0
  N  N32  1  0.032  0.690  0.000  1.0
  N  N33  1  0.968  0.310  0.000  1.0
  N  N34  1  0.190  0.468  0.500  1.0
  N  N35  1  0.810  0.532  0.500  1.0
  N  N36  1  0.690  0.032  0.000  1.0
  N  N37  1  0.310  0.968  0.000  1.0
  N  N38  1  0.262  0.738  0.500  1.0
  N  N39  1  0.738  0.262  0.500  1.0
  N  N40  1  0.238  0.238  0.000  1.0
  N  N41  1  0.762  0.762  0.000  1.0
  N  N42  1  0.375  0.625  0.500  1.0
  N  N43  1  0.625  0.375  0.500  1.0
  N  N44  1  0.125  0.125  0.000  1.0
  N  N45  1  0.875  0.875  0.000  1.0
[/CIF]
.