The crystal structure described by Sr4GeN4 crystallizes in the triclinic P-1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one N(1), one N(3), one N(4), and two equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded to one N(4), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(3)N5 trigonal bipyramid, and edges with two equivalent Sr(2)N5 trigonal bipyramids. In the third Sr site, Sr(3) is bonded to one N(3), two equivalent N(1), and two equivalent N(4) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(2)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and edges with two equivalent Sr(3)N5 trigonal bipyramids. In the fourth Sr site, Sr(4) is bonded in a 5-coordinate geometry to one N(2), one N(3), one N(4), and two equivalent N(1) atoms. Ge(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form GeN4 tetrahedra that share corners with three equivalent Sr(2)N5 trigonal bipyramids, corners with three equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and  an edgeedge with one Sr(3)N5 trigonal bipyramid. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(2), and one Ge(1) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), two equivalent Sr(3), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Sr4GeN4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.887
_cell_length_b   6.767
_cell_length_c   8.576
_cell_angle_alpha   74.156
_cell_angle_beta   82.302
_cell_angle_gamma   60.708
_symmetry_Int_Tables_number   1
_cell_volume   335.319
_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  0.795  0.617  0.133  1.0
  Sr  Sr1  1  0.205  0.383  0.867  1.0
  Sr  Sr2  1  0.726  0.237  0.944  1.0
  Sr  Sr3  1  0.274  0.763  0.056  1.0
  Sr  Sr4  1  0.727  0.536  0.557  1.0
  Sr  Sr5  1  0.273  0.464  0.443  1.0
  Sr  Sr6  1  0.207  0.912  0.633  1.0
  Sr  Sr7  1  0.793  0.088  0.367  1.0
  Ge  Ge8  1  0.748  0.876  0.750  1.0
  Ge  Ge9  1  0.252  0.124  0.250  1.0
  N  N10  1  0.960  0.723  0.592  1.0
  N  N11  1  0.040  0.277  0.408  1.0
  N  N12  1  0.960  0.818  0.908  1.0
  N  N13  1  0.040  0.182  0.092  1.0
  N  N14  1  0.580  0.711  0.840  1.0
  N  N15  1  0.420  0.289  0.160  1.0
  N  N16  1  0.423  0.793  0.340  1.0
  N  N17  1  0.577  0.207  0.660  1.0
[/CIF]
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The crystal structure described by Sr4GeN4 crystallizes in the triclinic P-1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to one N(1), one N(3), one N(4), and two equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded to one N(4), two equivalent N(2), and two equivalent N(3) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(3)N5 trigonal bipyramid, and edges with two equivalent Sr(2)N5 trigonal bipyramids. In the third Sr site, Sr(3) is bonded to one N(3), two equivalent N(1), and two equivalent N(4) atoms to form distorted SrN5 trigonal bipyramids that share corners with three equivalent Ge(1)N4 tetrahedra, corners with two equivalent Sr(2)N5 trigonal bipyramids,  an edgeedge with one Ge(1)N4 tetrahedra,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and edges with two equivalent Sr(3)N5 trigonal bipyramids. In the fourth Sr site, Sr(4) is bonded in a 5-coordinate geometry to one N(2), one N(3), one N(4), and two equivalent N(1) atoms. Ge(1) is bonded to one N(1), one N(2), one N(3), and one N(4) atom to form GeN4 tetrahedra that share corners with three equivalent Sr(2)N5 trigonal bipyramids, corners with three equivalent Sr(3)N5 trigonal bipyramids,  an edgeedge with one Sr(2)N5 trigonal bipyramid, and  an edgeedge with one Sr(3)N5 trigonal bipyramid. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the second N site, N(2) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(2), and one Ge(1) atom to form a mixture of distorted corner, face, and edge-sharing NSr5Ge octahedra. The corner-sharing octahedral tilt angles are 57°. In the third N site, N(3) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), two equivalent Sr(2), and one Ge(1) atom. In the fourth N site, N(4) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(4), two equivalent Sr(3), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Sr4GeN4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.887
_cell_length_b   6.767
_cell_length_c   8.576
_cell_angle_alpha   74.156
_cell_angle_beta   82.302
_cell_angle_gamma   60.708
_symmetry_Int_Tables_number   1
_cell_volume   335.319
_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  0.795  0.617  0.133  1.0
  Sr  Sr1  1  0.205  0.383  0.867  1.0
  Sr  Sr2  1  0.726  0.237  0.944  1.0
  Sr  Sr3  1  0.274  0.763  0.056  1.0
  Sr  Sr4  1  0.727  0.536  0.557  1.0
  Sr  Sr5  1  0.273  0.464  0.443  1.0
  Sr  Sr6  1  0.207  0.912  0.633  1.0
  Sr  Sr7  1  0.793  0.088  0.367  1.0
  Ge  Ge8  1  0.748  0.876  0.750  1.0
  Ge  Ge9  1  0.252  0.124  0.250  1.0
  N  N10  1  0.960  0.723  0.592  1.0
  N  N11  1  0.040  0.277  0.408  1.0
  N  N12  1  0.960  0.818  0.908  1.0
  N  N13  1  0.040  0.182  0.092  1.0
  N  N14  1  0.580  0.711  0.840  1.0
  N  N15  1  0.420  0.289  0.160  1.0
  N  N16  1  0.423  0.793  0.340  1.0
  N  N17  1  0.577  0.207  0.660  1.0
[/CIF]
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