The structure described by Sr10IrN8 crystallizes in the monoclinic C2/m space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted water-like geometry to one N(1) and three equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded to two equivalent N(1) and two equivalent N(4) atoms to form a mixture of corner and edge-sharing SrN4 trigonal pyramids. In the third Sr site, Sr(3) is bonded in a 4-coordinate geometry to one N(3), one N(4), and two equivalent N(2) atoms. In the fourth Sr site, Sr(4) is bonded to one N(3), one N(4), and two equivalent N(1) atoms to form a mixture of corner and edge-sharing SrN4 tetrahedra. In the fifth Sr site, Sr(5) is bonded in a see-saw-like geometry to one N(2) and three equivalent N(3) atoms. Ir(1) is bonded in a linear geometry to two equivalent N(4) atoms. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(2), and two equivalent Sr(4) atoms to form NSr5 trigonal bipyramids that share corners with two equivalent N(4)Sr4Ir trigonal bipyramids, corners with two equivalent N(1)Sr5 trigonal bipyramids, corners with two equivalent N(3)Sr5 trigonal bipyramids,  an edgeedge with one N(1)Sr5 trigonal bipyramid, and edges with two equivalent N(4)Sr4Ir trigonal bipyramids. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Sr(5), two equivalent Sr(3), and three equivalent Sr(1) atoms. In the third N site, N(3) is bonded to one Sr(3), one Sr(4), and three equivalent Sr(5) atoms to form distorted NSr5 trigonal bipyramids that share corners with two equivalent N(4)Sr4Ir trigonal bipyramids, corners with two equivalent N(1)Sr5 trigonal bipyramids, corners with two equivalent N(3)Sr5 trigonal bipyramids, and edges with two equivalent N(3)Sr5 trigonal bipyramids. In the fourth N site, N(4) is bonded to one Sr(3), one Sr(4), two equivalent Sr(2), and one Ir(1) atom to form NSr4Ir trigonal bipyramids that share corners with two equivalent N(1)Sr5 trigonal bipyramids, corners with two equivalent N(3)Sr5 trigonal bipyramids, corners with three equivalent N(4)Sr4Ir trigonal bipyramids, and edges with two equivalent N(1)Sr5 trigonal bipyramids. is represented by the CIF file [CIF]
data_Sr10IrN8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.936
_cell_length_b   4.866
_cell_length_c   8.755
_cell_angle_alpha   90.000
_cell_angle_beta   64.565
_cell_angle_gamma   78.239
_symmetry_Int_Tables_number   1
_cell_volume   447.373
_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  0.409  0.795  0.698  1.0
  Sr  Sr1  1  0.591  0.205  0.302  1.0
  Sr  Sr2  1  0.058  0.971  0.782  1.0
  Sr  Sr3  1  0.942  0.029  0.218  1.0
  Sr  Sr4  1  0.716  0.642  0.549  1.0
  Sr  Sr5  1  0.284  0.358  0.451  1.0
  Sr  Sr6  1  0.803  0.598  0.946  1.0
  Sr  Sr7  1  0.197  0.402  0.054  1.0
  Sr  Sr8  1  0.397  0.802  0.138  1.0
  Sr  Sr9  1  0.603  0.198  0.862  1.0
  Ir  Ir10  1  0.000  0.500  0.500  1.0
  N  N11  1  0.180  0.910  0.956  1.0
  N  N12  1  0.820  0.090  0.044  1.0
  N  N13  1  0.383  0.808  0.439  1.0
  N  N14  1  0.617  0.192  0.561  1.0
  N  N15  1  0.619  0.691  0.868  1.0
  N  N16  1  0.381  0.309  0.132  1.0
  N  N17  1  0.966  0.517  0.319  1.0
  N  N18  1  0.034  0.483  0.681  1.0
[/CIF]
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The structure described by Sr10IrN8 crystallizes in the monoclinic C2/m space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted water-like geometry to one N(1) and three equivalent N(2) atoms. In the second Sr site, Sr(2) is bonded to two equivalent N(1) and two equivalent N(4) atoms to form a mixture of corner and edge-sharing SrN4 trigonal pyramids. In the third Sr site, Sr(3) is bonded in a 4-coordinate geometry to one N(3), one N(4), and two equivalent N(2) atoms. In the fourth Sr site, Sr(4) is bonded to one N(3), one N(4), and two equivalent N(1) atoms to form a mixture of corner and edge-sharing SrN4 tetrahedra. In the fifth Sr site, Sr(5) is bonded in a see-saw-like geometry to one N(2) and three equivalent N(3) atoms. Ir(1) is bonded in a linear geometry to two equivalent N(4) atoms. There are four inequivalent N sites. In the first N site, N(1) is bonded to one Sr(1), two equivalent Sr(2), and two equivalent Sr(4) atoms to form NSr5 trigonal bipyramids that share corners with two equivalent N(4)Sr4Ir trigonal bipyramids, corners with two equivalent N(1)Sr5 trigonal bipyramids, corners with two equivalent N(3)Sr5 trigonal bipyramids,  an edgeedge with one N(1)Sr5 trigonal bipyramid, and edges with two equivalent N(4)Sr4Ir trigonal bipyramids. In the second N site, N(2) is bonded in a 6-coordinate geometry to one Sr(5), two equivalent Sr(3), and three equivalent Sr(1) atoms. In the third N site, N(3) is bonded to one Sr(3), one Sr(4), and three equivalent Sr(5) atoms to form distorted NSr5 trigonal bipyramids that share corners with two equivalent N(4)Sr4Ir trigonal bipyramids, corners with two equivalent N(1)Sr5 trigonal bipyramids, corners with two equivalent N(3)Sr5 trigonal bipyramids, and edges with two equivalent N(3)Sr5 trigonal bipyramids. In the fourth N site, N(4) is bonded to one Sr(3), one Sr(4), two equivalent Sr(2), and one Ir(1) atom to form NSr4Ir trigonal bipyramids that share corners with two equivalent N(1)Sr5 trigonal bipyramids, corners with two equivalent N(3)Sr5 trigonal bipyramids, corners with three equivalent N(4)Sr4Ir trigonal bipyramids, and edges with two equivalent N(1)Sr5 trigonal bipyramids. is represented by the CIF file [CIF]
data_Sr10IrN8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.936
_cell_length_b   4.866
_cell_length_c   8.755
_cell_angle_alpha   90.000
_cell_angle_beta   64.565
_cell_angle_gamma   78.239
_symmetry_Int_Tables_number   1
_cell_volume   447.373
_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  0.409  0.795  0.698  1.0
  Sr  Sr1  1  0.591  0.205  0.302  1.0
  Sr  Sr2  1  0.058  0.971  0.782  1.0
  Sr  Sr3  1  0.942  0.029  0.218  1.0
  Sr  Sr4  1  0.716  0.642  0.549  1.0
  Sr  Sr5  1  0.284  0.358  0.451  1.0
  Sr  Sr6  1  0.803  0.598  0.946  1.0
  Sr  Sr7  1  0.197  0.402  0.054  1.0
  Sr  Sr8  1  0.397  0.802  0.138  1.0
  Sr  Sr9  1  0.603  0.198  0.862  1.0
  Ir  Ir10  1  0.000  0.500  0.500  1.0
  N  N11  1  0.180  0.910  0.956  1.0
  N  N12  1  0.820  0.090  0.044  1.0
  N  N13  1  0.383  0.808  0.439  1.0
  N  N14  1  0.617  0.192  0.561  1.0
  N  N15  1  0.619  0.691  0.868  1.0
  N  N16  1  0.381  0.309  0.132  1.0
  N  N17  1  0.966  0.517  0.319  1.0
  N  N18  1  0.034  0.483  0.681  1.0
[/CIF]
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