The material described by Sr11(GeN5)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 Ge(1) and four equivalent N(1) atoms to form distorted SrGe2N4 octahedra that share corners with two equivalent N(4)Sr4Ge trigonal bipyramids, corners with four equivalent N(3)Sr4N trigonal bipyramids, and edges with two equivalent Sr(1)Ge2N4 octahedra. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent Ge(1), one N(1), one N(3), and two equivalent N(2) atoms. In the third Sr site, Sr(3) is bonded to two equivalent N(2), two equivalent N(3), and two equivalent N(4) atoms to form distorted SrN6 octahedra that share corners with two equivalent Sr(4)N4 trigonal pyramids, edges with two equivalent Sr(3)N6 octahedra, and edges with four equivalent Sr(4)N4 trigonal pyramids. In the fourth Sr site, Sr(4) is bonded to one N(4) 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 15°. Ge(1) is bonded in a single-bond geometry to one Sr(1), four equivalent Sr(2), and one N(4) atom. There are four inequivalent N sites. In the first N site, N(3) is bonded to two equivalent Sr(2), two equivalent Sr(3), and one N(1) atom to form NSr4N trigonal bipyramids that share corners with two equivalent Sr(1)Ge2N4 octahedra, corners with two equivalent N(4)Sr4Ge trigonal bipyramids, corners with two equivalent N(3)Sr4N trigonal bipyramids, edges with four equivalent N(2)Sr6 octahedra, and  an edgeedge with one N(4)Sr4Ge trigonal bipyramid. The corner-sharing octahedral tilt angles are 49°. In the second N site, N(4) is bonded to two equivalent Sr(3), two equivalent Sr(4), and one Ge(1) atom to form distorted NSr4Ge trigonal bipyramids that share  a cornercorner with one Sr(1)Ge2N4 octahedra, corners with two equivalent N(2)Sr6 octahedra, corners with two equivalent N(4)Sr4Ge trigonal bipyramids, corners with two equivalent N(3)Sr4N trigonal bipyramids, edges with four equivalent N(2)Sr6 octahedra, and  an edgeedge with one N(3)Sr4N trigonal bipyramid. The corner-sharing octahedral tilt angles range from 0-73°. In the third N site, N(1) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and one N(3) atom. 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 five equivalent N(2)Sr6 octahedra,  a cornercorner with one N(4)Sr4Ge trigonal bipyramid, edges with two equivalent N(2)Sr6 octahedra, edges with two equivalent N(4)Sr4Ge trigonal bipyramids, and edges with two equivalent N(3)Sr4N trigonal bipyramids. The corner-sharing octahedral tilt angles range from 19-54°. is represented by the CIF card [CIF]
data_Sr11(GeN5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.277
_cell_length_b   16.277
_cell_length_c   3.903
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1034.007
_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  0.006  0.778  0.500  1.0
  Sr  Sr3  1  0.994  0.222  0.500  1.0
  Sr  Sr4  1  0.494  0.278  0.000  1.0
  Sr  Sr5  1  0.506  0.722  0.000  1.0
  Sr  Sr6  1  0.778  0.006  0.500  1.0
  Sr  Sr7  1  0.222  0.994  0.500  1.0
  Sr  Sr8  1  0.278  0.494  0.000  1.0
  Sr  Sr9  1  0.722  0.506  0.000  1.0
  Sr  Sr10  1  0.707  0.707  0.500  1.0
  Sr  Sr11  1  0.293  0.293  0.500  1.0
  Sr  Sr12  1  0.793  0.207  0.000  1.0
  Sr  Sr13  1  0.207  0.793  0.000  1.0
  Sr  Sr14  1  0.394  0.879  0.500  1.0
  Sr  Sr15  1  0.606  0.121  0.500  1.0
  Sr  Sr16  1  0.106  0.379  0.000  1.0
  Sr  Sr17  1  0.894  0.621  0.000  1.0
  Sr  Sr18  1  0.879  0.394  0.500  1.0
  Sr  Sr19  1  0.121  0.606  0.500  1.0
  Sr  Sr20  1  0.379  0.106  0.000  1.0
  Sr  Sr21  1  0.621  0.894  0.000  1.0
  Ge  Ge22  1  0.353  0.647  0.500  1.0
  Ge  Ge23  1  0.647  0.353  0.500  1.0
  Ge  Ge24  1  0.147  0.147  0.000  1.0
  Ge  Ge25  1  0.853  0.853  0.000  1.0
  N  N26  1  0.075  0.925  0.500  1.0
  N  N27  1  0.925  0.075  0.500  1.0
  N  N28  1  0.425  0.425  0.000  1.0
  N  N29  1  0.575  0.575  0.000  1.0
  N  N30  1  0.454  0.178  0.500  1.0
  N  N31  1  0.546  0.822  0.500  1.0
  N  N32  1  0.046  0.678  0.000  1.0
  N  N33  1  0.954  0.322  0.000  1.0
  N  N34  1  0.178  0.454  0.500  1.0
  N  N35  1  0.822  0.546  0.500  1.0
  N  N36  1  0.678  0.046  0.000  1.0
  N  N37  1  0.322  0.954  0.000  1.0
  N  N38  1  0.869  0.131  0.500  1.0
  N  N39  1  0.131  0.869  0.500  1.0
  N  N40  1  0.631  0.631  0.000  1.0
  N  N41  1  0.369  0.369  0.000  1.0
  N  N42  1  0.725  0.275  0.500  1.0
  N  N43  1  0.275  0.725  0.500  1.0
  N  N44  1  0.775  0.775  0.000  1.0
  N  N45  1  0.225  0.225  0.000  1.0
[/CIF]
.
The material described by Sr11(GeN5)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 Ge(1) and four equivalent N(1) atoms to form distorted SrGe2N4 octahedra that share corners with two equivalent N(4)Sr4Ge trigonal bipyramids, corners with four equivalent N(3)Sr4N trigonal bipyramids, and edges with two equivalent Sr(1)Ge2N4 octahedra. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent Ge(1), one N(1), one N(3), and two equivalent N(2) atoms. In the third Sr site, Sr(3) is bonded to two equivalent N(2), two equivalent N(3), and two equivalent N(4) atoms to form distorted SrN6 octahedra that share corners with two equivalent Sr(4)N4 trigonal pyramids, edges with two equivalent Sr(3)N6 octahedra, and edges with four equivalent Sr(4)N4 trigonal pyramids. In the fourth Sr site, Sr(4) is bonded to one N(4) 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 15°. Ge(1) is bonded in a single-bond geometry to one Sr(1), four equivalent Sr(2), and one N(4) atom. There are four inequivalent N sites. In the first N site, N(3) is bonded to two equivalent Sr(2), two equivalent Sr(3), and one N(1) atom to form NSr4N trigonal bipyramids that share corners with two equivalent Sr(1)Ge2N4 octahedra, corners with two equivalent N(4)Sr4Ge trigonal bipyramids, corners with two equivalent N(3)Sr4N trigonal bipyramids, edges with four equivalent N(2)Sr6 octahedra, and  an edgeedge with one N(4)Sr4Ge trigonal bipyramid. The corner-sharing octahedral tilt angles are 49°. In the second N site, N(4) is bonded to two equivalent Sr(3), two equivalent Sr(4), and one Ge(1) atom to form distorted NSr4Ge trigonal bipyramids that share  a cornercorner with one Sr(1)Ge2N4 octahedra, corners with two equivalent N(2)Sr6 octahedra, corners with two equivalent N(4)Sr4Ge trigonal bipyramids, corners with two equivalent N(3)Sr4N trigonal bipyramids, edges with four equivalent N(2)Sr6 octahedra, and  an edgeedge with one N(3)Sr4N trigonal bipyramid. The corner-sharing octahedral tilt angles range from 0-73°. In the third N site, N(1) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and one N(3) atom. 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 five equivalent N(2)Sr6 octahedra,  a cornercorner with one N(4)Sr4Ge trigonal bipyramid, edges with two equivalent N(2)Sr6 octahedra, edges with two equivalent N(4)Sr4Ge trigonal bipyramids, and edges with two equivalent N(3)Sr4N trigonal bipyramids. The corner-sharing octahedral tilt angles range from 19-54°. is represented by the CIF card [CIF]
data_Sr11(GeN5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.277
_cell_length_b   16.277
_cell_length_c   3.903
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1034.007
_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  0.006  0.778  0.500  1.0
  Sr  Sr3  1  0.994  0.222  0.500  1.0
  Sr  Sr4  1  0.494  0.278  0.000  1.0
  Sr  Sr5  1  0.506  0.722  0.000  1.0
  Sr  Sr6  1  0.778  0.006  0.500  1.0
  Sr  Sr7  1  0.222  0.994  0.500  1.0
  Sr  Sr8  1  0.278  0.494  0.000  1.0
  Sr  Sr9  1  0.722  0.506  0.000  1.0
  Sr  Sr10  1  0.707  0.707  0.500  1.0
  Sr  Sr11  1  0.293  0.293  0.500  1.0
  Sr  Sr12  1  0.793  0.207  0.000  1.0
  Sr  Sr13  1  0.207  0.793  0.000  1.0
  Sr  Sr14  1  0.394  0.879  0.500  1.0
  Sr  Sr15  1  0.606  0.121  0.500  1.0
  Sr  Sr16  1  0.106  0.379  0.000  1.0
  Sr  Sr17  1  0.894  0.621  0.000  1.0
  Sr  Sr18  1  0.879  0.394  0.500  1.0
  Sr  Sr19  1  0.121  0.606  0.500  1.0
  Sr  Sr20  1  0.379  0.106  0.000  1.0
  Sr  Sr21  1  0.621  0.894  0.000  1.0
  Ge  Ge22  1  0.353  0.647  0.500  1.0
  Ge  Ge23  1  0.647  0.353  0.500  1.0
  Ge  Ge24  1  0.147  0.147  0.000  1.0
  Ge  Ge25  1  0.853  0.853  0.000  1.0
  N  N26  1  0.075  0.925  0.500  1.0
  N  N27  1  0.925  0.075  0.500  1.0
  N  N28  1  0.425  0.425  0.000  1.0
  N  N29  1  0.575  0.575  0.000  1.0
  N  N30  1  0.454  0.178  0.500  1.0
  N  N31  1  0.546  0.822  0.500  1.0
  N  N32  1  0.046  0.678  0.000  1.0
  N  N33  1  0.954  0.322  0.000  1.0
  N  N34  1  0.178  0.454  0.500  1.0
  N  N35  1  0.822  0.546  0.500  1.0
  N  N36  1  0.678  0.046  0.000  1.0
  N  N37  1  0.322  0.954  0.000  1.0
  N  N38  1  0.869  0.131  0.500  1.0
  N  N39  1  0.131  0.869  0.500  1.0
  N  N40  1  0.631  0.631  0.000  1.0
  N  N41  1  0.369  0.369  0.000  1.0
  N  N42  1  0.725  0.275  0.500  1.0
  N  N43  1  0.275  0.725  0.500  1.0
  N  N44  1  0.775  0.775  0.000  1.0
  N  N45  1  0.225  0.225  0.000  1.0
[/CIF]
.