The compound described by Sr8Mn2FeN8 crystallizes in the monoclinic C2/m space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one N(1), two equivalent N(3), and two equivalent N(4) atoms to form a mixture of distorted corner and edge-sharing SrN5 trigonal bipyramids. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one N(1), one N(4), and three equivalent N(2) atoms. In the third Sr site, Sr(3) is bonded to one N(2), two equivalent N(3), and two equivalent N(4) atoms to form a mixture of distorted corner and edge-sharing SrN5 square pyramids. In the fourth Sr site, Sr(4) is bonded to one N(2), one N(3), and three equivalent N(1) atoms to form a mixture of distorted corner and edge-sharing SrN5 trigonal bipyramids. Mn(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one N(3) atom. Fe(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), one Sr(2), three equivalent Sr(4), and one Mn(1) atom to form distorted NSr5Mn octahedra that share corners with two equivalent N(1)Sr5Mn octahedra, corners with three equivalent N(4)Sr5Fe octahedra, edges with two equivalent N(1)Sr5Mn octahedra, and edges with three equivalent N(3)Sr5Mn octahedra. The corner-sharing octahedral tilt angles range from 19-66°. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Sr(3), one Sr(4), three equivalent Sr(2), and one Mn(1) atom. In the third N site, N(3) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(3), and one Mn(1) atom to form distorted NSr5Mn octahedra that share corners with two equivalent N(3)Sr5Mn octahedra,  an edgeedge with one N(3)Sr5Mn octahedra, edges with three equivalent N(1)Sr5Mn octahedra, and edges with four equivalent N(4)Sr5Fe octahedra. The corner-sharing octahedral tilt angles are 16°. In the fourth N site, N(4) is bonded to one Sr(2), two equivalent Sr(1), two equivalent Sr(3), and one Fe(1) atom to form distorted NSr5Fe octahedra that share corners with three equivalent N(4)Sr5Fe octahedra, corners with three equivalent N(1)Sr5Mn octahedra,  an edgeedge with one N(4)Sr5Fe octahedra, and edges with four equivalent N(3)Sr5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-66°. is represented by the CIF file [CIF]
data_Sr8Mn2FeN8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.805
_cell_length_b   9.805
_cell_length_c   7.565
_cell_angle_alpha   74.451
_cell_angle_beta   74.451
_cell_angle_gamma   31.587
_symmetry_Int_Tables_number   1
_cell_volume   365.877
_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  0.404  0.404  0.966  1.0
  Sr  Sr1  1  0.333  0.333  0.467  1.0
  Sr  Sr2  1  0.971  0.971  0.259  1.0
  Sr  Sr3  1  0.199  0.199  0.193  1.0
  Sr  Sr4  1  0.801  0.801  0.807  1.0
  Sr  Sr5  1  0.029  0.029  0.741  1.0
  Sr  Sr6  1  0.667  0.667  0.533  1.0
  Sr  Sr7  1  0.596  0.596  0.034  1.0
  Mn  Mn8  1  0.812  0.812  0.206  1.0
  Mn  Mn9  1  0.188  0.188  0.794  1.0
  Fe  Fe10  1  0.500  0.500  0.500  1.0
  N  N11  1  0.276  0.276  0.828  1.0
  N  N12  1  0.822  0.822  0.426  1.0
  N  N13  1  0.108  0.108  0.985  1.0
  N  N14  1  0.892  0.892  0.015  1.0
  N  N15  1  0.178  0.178  0.574  1.0
  N  N16  1  0.475  0.475  0.282  1.0
  N  N17  1  0.724  0.724  0.172  1.0
  N  N18  1  0.525  0.525  0.718  1.0
[/CIF]
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The compound described by Sr8Mn2FeN8 crystallizes in the monoclinic C2/m space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one N(1), two equivalent N(3), and two equivalent N(4) atoms to form a mixture of distorted corner and edge-sharing SrN5 trigonal bipyramids. In the second Sr site, Sr(2) is bonded in a 5-coordinate geometry to one N(1), one N(4), and three equivalent N(2) atoms. In the third Sr site, Sr(3) is bonded to one N(2), two equivalent N(3), and two equivalent N(4) atoms to form a mixture of distorted corner and edge-sharing SrN5 square pyramids. In the fourth Sr site, Sr(4) is bonded to one N(2), one N(3), and three equivalent N(1) atoms to form a mixture of distorted corner and edge-sharing SrN5 trigonal bipyramids. Mn(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one N(3) atom. Fe(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), one Sr(2), three equivalent Sr(4), and one Mn(1) atom to form distorted NSr5Mn octahedra that share corners with two equivalent N(1)Sr5Mn octahedra, corners with three equivalent N(4)Sr5Fe octahedra, edges with two equivalent N(1)Sr5Mn octahedra, and edges with three equivalent N(3)Sr5Mn octahedra. The corner-sharing octahedral tilt angles range from 19-66°. In the second N site, N(2) is bonded in a distorted single-bond geometry to one Sr(3), one Sr(4), three equivalent Sr(2), and one Mn(1) atom. In the third N site, N(3) is bonded to one Sr(4), two equivalent Sr(1), two equivalent Sr(3), and one Mn(1) atom to form distorted NSr5Mn octahedra that share corners with two equivalent N(3)Sr5Mn octahedra,  an edgeedge with one N(3)Sr5Mn octahedra, edges with three equivalent N(1)Sr5Mn octahedra, and edges with four equivalent N(4)Sr5Fe octahedra. The corner-sharing octahedral tilt angles are 16°. In the fourth N site, N(4) is bonded to one Sr(2), two equivalent Sr(1), two equivalent Sr(3), and one Fe(1) atom to form distorted NSr5Fe octahedra that share corners with three equivalent N(4)Sr5Fe octahedra, corners with three equivalent N(1)Sr5Mn octahedra,  an edgeedge with one N(4)Sr5Fe octahedra, and edges with four equivalent N(3)Sr5Mn octahedra. The corner-sharing octahedral tilt angles range from 0-66°. is represented by the CIF file [CIF]
data_Sr8Mn2FeN8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.805
_cell_length_b   9.805
_cell_length_c   7.565
_cell_angle_alpha   74.451
_cell_angle_beta   74.451
_cell_angle_gamma   31.587
_symmetry_Int_Tables_number   1
_cell_volume   365.877
_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  0.404  0.404  0.966  1.0
  Sr  Sr1  1  0.333  0.333  0.467  1.0
  Sr  Sr2  1  0.971  0.971  0.259  1.0
  Sr  Sr3  1  0.199  0.199  0.193  1.0
  Sr  Sr4  1  0.801  0.801  0.807  1.0
  Sr  Sr5  1  0.029  0.029  0.741  1.0
  Sr  Sr6  1  0.667  0.667  0.533  1.0
  Sr  Sr7  1  0.596  0.596  0.034  1.0
  Mn  Mn8  1  0.812  0.812  0.206  1.0
  Mn  Mn9  1  0.188  0.188  0.794  1.0
  Fe  Fe10  1  0.500  0.500  0.500  1.0
  N  N11  1  0.276  0.276  0.828  1.0
  N  N12  1  0.822  0.822  0.426  1.0
  N  N13  1  0.108  0.108  0.985  1.0
  N  N14  1  0.892  0.892  0.015  1.0
  N  N15  1  0.178  0.178  0.574  1.0
  N  N16  1  0.475  0.475  0.282  1.0
  N  N17  1  0.724  0.724  0.172  1.0
  N  N18  1  0.525  0.525  0.718  1.0
[/CIF]
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