The compound described by Sr5(FeN2)2 is Pb(Zr_(1-x)Ti_x)O3-like structured and crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent N(1) atoms. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. Fe(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to one Sr(1), four equivalent Sr(2), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing NSr5Fe octahedra. The corner-sharing octahedral tilt angles range from 7-23°. is represented by the CIF file [CIF]
data_Sr5(FeN2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.731
_cell_length_b   8.731
_cell_length_c   12.419
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   946.741
_cell_formula_units_Z   4
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  0.750  0.750  0.338  1.0
  Sr  Sr1  1  0.750  0.750  0.838  1.0
  Sr  Sr2  1  0.250  0.250  0.662  1.0
  Sr  Sr3  1  0.250  0.250  0.162  1.0
  Sr  Sr4  1  0.137  0.569  0.398  1.0
  Sr  Sr5  1  0.363  0.569  0.898  1.0
  Sr  Sr6  1  0.137  0.931  0.898  1.0
  Sr  Sr7  1  0.363  0.931  0.398  1.0
  Sr  Sr8  1  0.569  0.137  0.898  1.0
  Sr  Sr9  1  0.931  0.137  0.398  1.0
  Sr  Sr10  1  0.569  0.363  0.398  1.0
  Sr  Sr11  1  0.931  0.363  0.898  1.0
  Sr  Sr12  1  0.863  0.431  0.602  1.0
  Sr  Sr13  1  0.637  0.431  0.102  1.0
  Sr  Sr14  1  0.863  0.069  0.102  1.0
  Sr  Sr15  1  0.637  0.069  0.602  1.0
  Sr  Sr16  1  0.431  0.863  0.102  1.0
  Sr  Sr17  1  0.069  0.863  0.602  1.0
  Sr  Sr18  1  0.431  0.637  0.602  1.0
  Sr  Sr19  1  0.069  0.637  0.102  1.0
  Fe  Fe20  1  0.092  0.908  0.250  1.0
  Fe  Fe21  1  0.408  0.908  0.750  1.0
  Fe  Fe22  1  0.092  0.592  0.750  1.0
  Fe  Fe23  1  0.408  0.592  0.250  1.0
  Fe  Fe24  1  0.908  0.092  0.750  1.0
  Fe  Fe25  1  0.592  0.092  0.250  1.0
  Fe  Fe26  1  0.908  0.408  0.250  1.0
  Fe  Fe27  1  0.592  0.408  0.750  1.0
  N  N28  1  0.642  0.058  0.384  1.0
  N  N29  1  0.858  0.058  0.884  1.0
  N  N30  1  0.642  0.442  0.884  1.0
  N  N31  1  0.858  0.442  0.384  1.0
  N  N32  1  0.058  0.642  0.884  1.0
  N  N33  1  0.442  0.642  0.384  1.0
  N  N34  1  0.058  0.858  0.384  1.0
  N  N35  1  0.442  0.858  0.884  1.0
  N  N36  1  0.358  0.942  0.616  1.0
  N  N37  1  0.142  0.942  0.116  1.0
  N  N38  1  0.358  0.558  0.116  1.0
  N  N39  1  0.142  0.558  0.616  1.0
  N  N40  1  0.942  0.358  0.116  1.0
  N  N41  1  0.558  0.358  0.616  1.0
  N  N42  1  0.942  0.142  0.616  1.0
  N  N43  1  0.558  0.142  0.116  1.0
[/CIF]
.
The compound described by Sr5(FeN2)2 is Pb(Zr_(1-x)Ti_x)O3-like structured and crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent N(1) atoms. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to four equivalent N(1) atoms. Fe(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to one Sr(1), four equivalent Sr(2), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing NSr5Fe octahedra. The corner-sharing octahedral tilt angles range from 7-23°. is represented by the CIF file [CIF]
data_Sr5(FeN2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.731
_cell_length_b   8.731
_cell_length_c   12.419
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   946.741
_cell_formula_units_Z   4
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  0.750  0.750  0.338  1.0
  Sr  Sr1  1  0.750  0.750  0.838  1.0
  Sr  Sr2  1  0.250  0.250  0.662  1.0
  Sr  Sr3  1  0.250  0.250  0.162  1.0
  Sr  Sr4  1  0.137  0.569  0.398  1.0
  Sr  Sr5  1  0.363  0.569  0.898  1.0
  Sr  Sr6  1  0.137  0.931  0.898  1.0
  Sr  Sr7  1  0.363  0.931  0.398  1.0
  Sr  Sr8  1  0.569  0.137  0.898  1.0
  Sr  Sr9  1  0.931  0.137  0.398  1.0
  Sr  Sr10  1  0.569  0.363  0.398  1.0
  Sr  Sr11  1  0.931  0.363  0.898  1.0
  Sr  Sr12  1  0.863  0.431  0.602  1.0
  Sr  Sr13  1  0.637  0.431  0.102  1.0
  Sr  Sr14  1  0.863  0.069  0.102  1.0
  Sr  Sr15  1  0.637  0.069  0.602  1.0
  Sr  Sr16  1  0.431  0.863  0.102  1.0
  Sr  Sr17  1  0.069  0.863  0.602  1.0
  Sr  Sr18  1  0.431  0.637  0.602  1.0
  Sr  Sr19  1  0.069  0.637  0.102  1.0
  Fe  Fe20  1  0.092  0.908  0.250  1.0
  Fe  Fe21  1  0.408  0.908  0.750  1.0
  Fe  Fe22  1  0.092  0.592  0.750  1.0
  Fe  Fe23  1  0.408  0.592  0.250  1.0
  Fe  Fe24  1  0.908  0.092  0.750  1.0
  Fe  Fe25  1  0.592  0.092  0.250  1.0
  Fe  Fe26  1  0.908  0.408  0.250  1.0
  Fe  Fe27  1  0.592  0.408  0.750  1.0
  N  N28  1  0.642  0.058  0.384  1.0
  N  N29  1  0.858  0.058  0.884  1.0
  N  N30  1  0.642  0.442  0.884  1.0
  N  N31  1  0.858  0.442  0.384  1.0
  N  N32  1  0.058  0.642  0.884  1.0
  N  N33  1  0.442  0.642  0.384  1.0
  N  N34  1  0.058  0.858  0.384  1.0
  N  N35  1  0.442  0.858  0.884  1.0
  N  N36  1  0.358  0.942  0.616  1.0
  N  N37  1  0.142  0.942  0.116  1.0
  N  N38  1  0.358  0.558  0.116  1.0
  N  N39  1  0.142  0.558  0.616  1.0
  N  N40  1  0.942  0.358  0.116  1.0
  N  N41  1  0.558  0.358  0.616  1.0
  N  N42  1  0.942  0.142  0.616  1.0
  N  N43  1  0.558  0.142  0.116  1.0
[/CIF]
.