The structure described by Fe2NiN2 crystallizes in the trigonal R-3m space group. Fe(1) is bonded to four equivalent N(1) atoms to form a mixture of corner and edge-sharing FeN4 trigonal pyramids. Ni(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to four equivalent Fe(1) and one Ni(1) atom to form a mixture of corner and edge-sharing NFe4Ni trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe2NiN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.213
_cell_length_b   3.217
_cell_length_c   6.959
_cell_angle_alpha   90.000
_cell_angle_beta   117.522
_cell_angle_gamma   120.035
_symmetry_Int_Tables_number   1
_cell_volume   52.651
_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
  Fe  Fe0  1  0.857  0.428  0.142  1.0
  Fe  Fe1  1  0.143  0.572  0.858  1.0
  Ni  Ni2  1  0.000  0.000  0.500  1.0
  N  N3  1  0.409  0.205  0.808  1.0
  N  N4  1  0.591  0.795  0.192  1.0
[/CIF]
.
The structure described by Fe2NiN2 crystallizes in the trigonal R-3m space group. Fe(1) is bonded to four equivalent N(1) atoms to form a mixture of corner and edge-sharing FeN4 trigonal pyramids. Ni(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to four equivalent Fe(1) and one Ni(1) atom to form a mixture of corner and edge-sharing NFe4Ni trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe2NiN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.213
_cell_length_b   3.217
_cell_length_c   6.959
_cell_angle_alpha   90.000
_cell_angle_beta   117.522
_cell_angle_gamma   120.035
_symmetry_Int_Tables_number   1
_cell_volume   52.651
_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
  Fe  Fe0  1  0.857  0.428  0.142  1.0
  Fe  Fe1  1  0.143  0.572  0.858  1.0
  Ni  Ni2  1  0.000  0.000  0.500  1.0
  N  N3  1  0.409  0.205  0.808  1.0
  N  N4  1  0.591  0.795  0.192  1.0
[/CIF]
.