The material structure described by Sr11Ge4N6 crystallizes in the tetragonal P4/nbm space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to two equivalent Ge(3) and three equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded in a 2-coordinate geometry to two equivalent Ge(2) and two equivalent N(1) atoms. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one N(1) and four equivalent N(2) atoms. In the fourth Sr site, Sr(4) is bonded in a linear geometry to four equivalent Ge(2) and two equivalent N(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a water-like geometry to two equivalent N(2) atoms. In the second Ge site, Ge(2) is bonded to four equivalent Sr(4) and eight equivalent Sr(2) atoms to form distorted GeSr12 cuboctahedra that share corners with four equivalent Ge(2)Sr12 cuboctahedra, faces with four equivalent Ge(2)Sr12 cuboctahedra, and faces with eight equivalent N(1)Sr6 octahedra. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to eight equivalent Sr(1) atoms. There are two inequivalent N sites. In the first N site, N(2) is bonded to two equivalent Sr(3), three equivalent Sr(1), and one Ge(1) atom to form distorted NSr5Ge octahedra that share corners with two equivalent N(2)Sr5Ge octahedra, corners with two equivalent N(1)Sr6 octahedra, edges with four equivalent N(2)Sr5Ge octahedra, and  a faceface with one N(2)Sr5Ge octahedra. The corner-sharing octahedral tilt angles range from 32-74°. In the second N site, N(1) is bonded to one Sr(3), one Sr(4), and four equivalent Sr(2) atoms to form NSr6 octahedra that share corners with four equivalent N(2)Sr5Ge octahedra, corners with five equivalent N(1)Sr6 octahedra, and faces with four equivalent Ge(2)Sr12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-74°. is represented by the CIF card [CIF]
data_Sr11(Ge2N3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.327
_cell_length_b   7.327
_cell_length_c   18.853
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1012.173
_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  0.828  0.672  0.599  1.0
  Sr  Sr1  1  0.221  0.279  0.130  1.0
  Sr  Sr2  1  0.000  0.000  0.726  1.0
  Sr  Sr3  1  0.779  0.279  0.870  1.0
  Sr  Sr4  1  0.328  0.828  0.599  1.0
  Sr  Sr5  1  0.672  0.828  0.401  1.0
  Sr  Sr6  1  0.172  0.328  0.599  1.0
  Sr  Sr7  1  0.721  0.221  0.130  1.0
  Sr  Sr8  1  0.779  0.721  0.130  1.0
  Sr  Sr9  1  0.279  0.221  0.870  1.0
  Sr  Sr10  1  0.172  0.672  0.401  1.0
  Sr  Sr11  1  0.279  0.779  0.130  1.0
  Sr  Sr12  1  0.000  0.000  0.000  1.0
  Sr  Sr13  1  0.500  0.500  0.726  1.0
  Sr  Sr14  1  0.672  0.172  0.599  1.0
  Sr  Sr15  1  0.328  0.172  0.401  1.0
  Sr  Sr16  1  0.221  0.721  0.870  1.0
  Sr  Sr17  1  0.828  0.328  0.401  1.0
  Sr  Sr18  1  0.721  0.779  0.870  1.0
  Sr  Sr19  1  0.500  0.500  0.000  1.0
  Sr  Sr20  1  0.000  0.000  0.274  1.0
  Sr  Sr21  1  0.500  0.500  0.274  1.0
  Ge  Ge22  1  0.000  0.500  0.258  1.0
  Ge  Ge23  1  0.500  0.000  0.742  1.0
  Ge  Ge24  1  0.000  0.500  0.742  1.0
  Ge  Ge25  1  0.000  0.500  0.000  1.0
  Ge  Ge26  1  0.500  0.500  0.500  1.0
  Ge  Ge27  1  0.500  0.000  0.258  1.0
  Ge  Ge28  1  0.000  0.000  0.500  1.0
  Ge  Ge29  1  0.500  0.000  0.000  1.0
  N  N30  1  0.500  0.500  0.856  1.0
  N  N31  1  0.000  0.000  0.856  1.0
  N  N32  1  0.645  0.855  0.683  1.0
  N  N33  1  0.355  0.855  0.317  1.0
  N  N34  1  0.145  0.645  0.683  1.0
  N  N35  1  0.500  0.500  0.144  1.0
  N  N36  1  0.145  0.355  0.317  1.0
  N  N37  1  0.645  0.145  0.317  1.0
  N  N38  1  0.855  0.355  0.683  1.0
  N  N39  1  0.355  0.145  0.683  1.0
  N  N40  1  0.855  0.645  0.317  1.0
  N  N41  1  0.000  0.000  0.144  1.0
[/CIF]
.
The material structure described by Sr11Ge4N6 crystallizes in the tetragonal P4/nbm space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to two equivalent Ge(3) and three equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded in a 2-coordinate geometry to two equivalent Ge(2) and two equivalent N(1) atoms. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one N(1) and four equivalent N(2) atoms. In the fourth Sr site, Sr(4) is bonded in a linear geometry to four equivalent Ge(2) and two equivalent N(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a water-like geometry to two equivalent N(2) atoms. In the second Ge site, Ge(2) is bonded to four equivalent Sr(4) and eight equivalent Sr(2) atoms to form distorted GeSr12 cuboctahedra that share corners with four equivalent Ge(2)Sr12 cuboctahedra, faces with four equivalent Ge(2)Sr12 cuboctahedra, and faces with eight equivalent N(1)Sr6 octahedra. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to eight equivalent Sr(1) atoms. There are two inequivalent N sites. In the first N site, N(2) is bonded to two equivalent Sr(3), three equivalent Sr(1), and one Ge(1) atom to form distorted NSr5Ge octahedra that share corners with two equivalent N(2)Sr5Ge octahedra, corners with two equivalent N(1)Sr6 octahedra, edges with four equivalent N(2)Sr5Ge octahedra, and  a faceface with one N(2)Sr5Ge octahedra. The corner-sharing octahedral tilt angles range from 32-74°. In the second N site, N(1) is bonded to one Sr(3), one Sr(4), and four equivalent Sr(2) atoms to form NSr6 octahedra that share corners with four equivalent N(2)Sr5Ge octahedra, corners with five equivalent N(1)Sr6 octahedra, and faces with four equivalent Ge(2)Sr12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-74°. is represented by the CIF card [CIF]
data_Sr11(Ge2N3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.327
_cell_length_b   7.327
_cell_length_c   18.853
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1012.173
_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  0.828  0.672  0.599  1.0
  Sr  Sr1  1  0.221  0.279  0.130  1.0
  Sr  Sr2  1  0.000  0.000  0.726  1.0
  Sr  Sr3  1  0.779  0.279  0.870  1.0
  Sr  Sr4  1  0.328  0.828  0.599  1.0
  Sr  Sr5  1  0.672  0.828  0.401  1.0
  Sr  Sr6  1  0.172  0.328  0.599  1.0
  Sr  Sr7  1  0.721  0.221  0.130  1.0
  Sr  Sr8  1  0.779  0.721  0.130  1.0
  Sr  Sr9  1  0.279  0.221  0.870  1.0
  Sr  Sr10  1  0.172  0.672  0.401  1.0
  Sr  Sr11  1  0.279  0.779  0.130  1.0
  Sr  Sr12  1  0.000  0.000  0.000  1.0
  Sr  Sr13  1  0.500  0.500  0.726  1.0
  Sr  Sr14  1  0.672  0.172  0.599  1.0
  Sr  Sr15  1  0.328  0.172  0.401  1.0
  Sr  Sr16  1  0.221  0.721  0.870  1.0
  Sr  Sr17  1  0.828  0.328  0.401  1.0
  Sr  Sr18  1  0.721  0.779  0.870  1.0
  Sr  Sr19  1  0.500  0.500  0.000  1.0
  Sr  Sr20  1  0.000  0.000  0.274  1.0
  Sr  Sr21  1  0.500  0.500  0.274  1.0
  Ge  Ge22  1  0.000  0.500  0.258  1.0
  Ge  Ge23  1  0.500  0.000  0.742  1.0
  Ge  Ge24  1  0.000  0.500  0.742  1.0
  Ge  Ge25  1  0.000  0.500  0.000  1.0
  Ge  Ge26  1  0.500  0.500  0.500  1.0
  Ge  Ge27  1  0.500  0.000  0.258  1.0
  Ge  Ge28  1  0.000  0.000  0.500  1.0
  Ge  Ge29  1  0.500  0.000  0.000  1.0
  N  N30  1  0.500  0.500  0.856  1.0
  N  N31  1  0.000  0.000  0.856  1.0
  N  N32  1  0.645  0.855  0.683  1.0
  N  N33  1  0.355  0.855  0.317  1.0
  N  N34  1  0.145  0.645  0.683  1.0
  N  N35  1  0.500  0.500  0.144  1.0
  N  N36  1  0.145  0.355  0.317  1.0
  N  N37  1  0.645  0.145  0.317  1.0
  N  N38  1  0.855  0.355  0.683  1.0
  N  N39  1  0.355  0.145  0.683  1.0
  N  N40  1  0.855  0.645  0.317  1.0
  N  N41  1  0.000  0.000  0.144  1.0
[/CIF]
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