The structure described by Cr3N2 is Corundum-like structured and crystallizes in the cubic Ia-3 space group. Cr(1) is bonded to one N(1) and three equivalent N(2) atoms to form a mixture of edge and corner-sharing CrN4 trigonal pyramids. There are two inequivalent N sites. In the first N site, N(1) is bonded to six equivalent Cr(1) atoms to form a mixture of edge and corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second N site, N(2) is bonded to six equivalent Cr(1) atoms to form a mixture of distorted edge and corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr3N2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.922
_cell_length_b   7.922
_cell_length_c   7.922
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   382.685
_cell_formula_units_Z   8
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
  Cr  Cr0  1  0.777  0.553  0.508  1.0
  Cr  Cr1  1  0.723  0.231  0.776  1.0
  Cr  Cr2  1  0.545  0.269  0.992  1.0
  Cr  Cr3  1  0.955  0.947  0.724  1.0
  Cr  Cr4  1  0.553  0.508  0.777  1.0
  Cr  Cr5  1  0.231  0.776  0.723  1.0
  Cr  Cr6  1  0.269  0.992  0.545  1.0
  Cr  Cr7  1  0.947  0.724  0.955  1.0
  Cr  Cr8  1  0.508  0.777  0.553  1.0
  Cr  Cr9  1  0.776  0.723  0.231  1.0
  Cr  Cr10  1  0.992  0.545  0.269  1.0
  Cr  Cr11  1  0.724  0.955  0.947  1.0
  Cr  Cr12  1  0.223  0.447  0.492  1.0
  Cr  Cr13  1  0.277  0.769  0.224  1.0
  Cr  Cr14  1  0.455  0.731  0.008  1.0
  Cr  Cr15  1  0.045  0.053  0.276  1.0
  Cr  Cr16  1  0.447  0.492  0.223  1.0
  Cr  Cr17  1  0.769  0.224  0.277  1.0
  Cr  Cr18  1  0.731  0.008  0.455  1.0
  Cr  Cr19  1  0.053  0.276  0.045  1.0
  Cr  Cr20  1  0.492  0.223  0.447  1.0
  Cr  Cr21  1  0.224  0.277  0.769  1.0
  Cr  Cr22  1  0.008  0.455  0.731  1.0
  Cr  Cr23  1  0.276  0.045  0.053  1.0
  N  N24  1  0.000  0.500  0.500  1.0
  N  N25  1  0.500  0.000  0.500  1.0
  N  N26  1  0.500  0.500  0.000  1.0
  N  N27  1  0.000  0.000  0.000  1.0
  N  N28  1  0.750  0.956  0.206  1.0
  N  N29  1  0.250  0.544  0.294  1.0
  N  N30  1  0.956  0.206  0.750  1.0
  N  N31  1  0.544  0.294  0.250  1.0
  N  N32  1  0.206  0.750  0.956  1.0
  N  N33  1  0.294  0.250  0.544  1.0
  N  N34  1  0.250  0.044  0.794  1.0
  N  N35  1  0.750  0.456  0.706  1.0
  N  N36  1  0.044  0.794  0.250  1.0
  N  N37  1  0.456  0.706  0.750  1.0
  N  N38  1  0.794  0.250  0.044  1.0
  N  N39  1  0.706  0.750  0.456  1.0
[/CIF]
.
The structure described by Cr3N2 is Corundum-like structured and crystallizes in the cubic Ia-3 space group. Cr(1) is bonded to one N(1) and three equivalent N(2) atoms to form a mixture of edge and corner-sharing CrN4 trigonal pyramids. There are two inequivalent N sites. In the first N site, N(1) is bonded to six equivalent Cr(1) atoms to form a mixture of edge and corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second N site, N(2) is bonded to six equivalent Cr(1) atoms to form a mixture of distorted edge and corner-sharing NCr6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr3N2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.922
_cell_length_b   7.922
_cell_length_c   7.922
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   382.685
_cell_formula_units_Z   8
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
  Cr  Cr0  1  0.777  0.553  0.508  1.0
  Cr  Cr1  1  0.723  0.231  0.776  1.0
  Cr  Cr2  1  0.545  0.269  0.992  1.0
  Cr  Cr3  1  0.955  0.947  0.724  1.0
  Cr  Cr4  1  0.553  0.508  0.777  1.0
  Cr  Cr5  1  0.231  0.776  0.723  1.0
  Cr  Cr6  1  0.269  0.992  0.545  1.0
  Cr  Cr7  1  0.947  0.724  0.955  1.0
  Cr  Cr8  1  0.508  0.777  0.553  1.0
  Cr  Cr9  1  0.776  0.723  0.231  1.0
  Cr  Cr10  1  0.992  0.545  0.269  1.0
  Cr  Cr11  1  0.724  0.955  0.947  1.0
  Cr  Cr12  1  0.223  0.447  0.492  1.0
  Cr  Cr13  1  0.277  0.769  0.224  1.0
  Cr  Cr14  1  0.455  0.731  0.008  1.0
  Cr  Cr15  1  0.045  0.053  0.276  1.0
  Cr  Cr16  1  0.447  0.492  0.223  1.0
  Cr  Cr17  1  0.769  0.224  0.277  1.0
  Cr  Cr18  1  0.731  0.008  0.455  1.0
  Cr  Cr19  1  0.053  0.276  0.045  1.0
  Cr  Cr20  1  0.492  0.223  0.447  1.0
  Cr  Cr21  1  0.224  0.277  0.769  1.0
  Cr  Cr22  1  0.008  0.455  0.731  1.0
  Cr  Cr23  1  0.276  0.045  0.053  1.0
  N  N24  1  0.000  0.500  0.500  1.0
  N  N25  1  0.500  0.000  0.500  1.0
  N  N26  1  0.500  0.500  0.000  1.0
  N  N27  1  0.000  0.000  0.000  1.0
  N  N28  1  0.750  0.956  0.206  1.0
  N  N29  1  0.250  0.544  0.294  1.0
  N  N30  1  0.956  0.206  0.750  1.0
  N  N31  1  0.544  0.294  0.250  1.0
  N  N32  1  0.206  0.750  0.956  1.0
  N  N33  1  0.294  0.250  0.544  1.0
  N  N34  1  0.250  0.044  0.794  1.0
  N  N35  1  0.750  0.456  0.706  1.0
  N  N36  1  0.044  0.794  0.250  1.0
  N  N37  1  0.456  0.706  0.750  1.0
  N  N38  1  0.794  0.250  0.044  1.0
  N  N39  1  0.706  0.750  0.456  1.0
[/CIF]
.