The crystal structure described by Sr4N3 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a rectangular see-saw-like geometry to one N(1), one N(2), and two equivalent N(3) atoms. In the second Sr site, Sr(2) is bonded to one N(2), one N(3), and two equivalent N(1) atoms to form a mixture of distorted corner and edge-sharing SrN4 trigonal pyramids. In the third Sr site, Sr(3) is bonded to one N(2), one N(3), and two equivalent N(1) atoms to form a mixture of distorted corner and edge-sharing SrN4 trigonal pyramids. In the fourth Sr site, Sr(4) is bonded in a 5-coordinate geometry to one N(1), two equivalent N(2), and two equivalent N(3) atoms. There are three inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), one Sr(4), two equivalent Sr(2), and two equivalent Sr(3) atoms to form edge-sharing NSr6 octahedra. In the second N site, N(2) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and two equivalent Sr(4) atoms. In the third N site, N(3) is bonded to one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent Sr(4) atoms to form distorted edge-sharing NSr6 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr4N3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.009
_cell_length_b   6.402
_cell_length_c   6.598
_cell_angle_alpha   115.041
_cell_angle_beta   93.139
_cell_angle_gamma   90.576
_symmetry_Int_Tables_number   1
_cell_volume   153.095
_cell_formula_units_Z   1
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  0.039  0.026  0.906  1.0
  Sr  Sr1  1  0.524  0.437  0.836  1.0
  Sr  Sr2  1  0.484  0.901  0.409  1.0
  Sr  Sr3  1  0.977  0.469  0.437  1.0
  N  N4  1  0.003  0.164  0.593  1.0
  N  N5  1  0.449  0.410  0.180  1.0
  N  N6  1  0.502  0.759  0.722  1.0
[/CIF]
.
The crystal structure described by Sr4N3 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a rectangular see-saw-like geometry to one N(1), one N(2), and two equivalent N(3) atoms. In the second Sr site, Sr(2) is bonded to one N(2), one N(3), and two equivalent N(1) atoms to form a mixture of distorted corner and edge-sharing SrN4 trigonal pyramids. In the third Sr site, Sr(3) is bonded to one N(2), one N(3), and two equivalent N(1) atoms to form a mixture of distorted corner and edge-sharing SrN4 trigonal pyramids. In the fourth Sr site, Sr(4) is bonded in a 5-coordinate geometry to one N(1), two equivalent N(2), and two equivalent N(3) atoms. There are three inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), one Sr(4), two equivalent Sr(2), and two equivalent Sr(3) atoms to form edge-sharing NSr6 octahedra. In the second N site, N(2) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and two equivalent Sr(4) atoms. In the third N site, N(3) is bonded to one Sr(2), one Sr(3), two equivalent Sr(1), and two equivalent Sr(4) atoms to form distorted edge-sharing NSr6 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr4N3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.009
_cell_length_b   6.402
_cell_length_c   6.598
_cell_angle_alpha   115.041
_cell_angle_beta   93.139
_cell_angle_gamma   90.576
_symmetry_Int_Tables_number   1
_cell_volume   153.095
_cell_formula_units_Z   1
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  0.039  0.026  0.906  1.0
  Sr  Sr1  1  0.524  0.437  0.836  1.0
  Sr  Sr2  1  0.484  0.901  0.409  1.0
  Sr  Sr3  1  0.977  0.469  0.437  1.0
  N  N4  1  0.003  0.164  0.593  1.0
  N  N5  1  0.449  0.410  0.180  1.0
  N  N6  1  0.502  0.759  0.722  1.0
[/CIF]
.