The structure described by CrN2 crystallizes in the hexagonal P6_3/mmc space group. Cr(1) is bonded to one N(1), one N(3), and two equivalent N(2) atoms to form corner-sharing CrN4 tetrahedra. There are three inequivalent N sites. In the first N site, N(2) is bonded in a bent 120 degrees geometry to two equivalent Cr(1) atoms. In the second N site, N(1) is bonded in a linear geometry to two equivalent Cr(1) atoms. In the third N site, N(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Cr(1) atoms. is represented by the CIF file [CIF]
data_CrN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.587
_cell_length_b   10.587
_cell_length_c   11.043
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   1071.888
_cell_formula_units_Z   12
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  0.430  0.570  0.105  1.0
  Cr  Cr1  1  0.430  0.861  0.105  1.0
  Cr  Cr2  1  0.139  0.570  0.105  1.0
  Cr  Cr3  1  0.570  0.430  0.895  1.0
  Cr  Cr4  1  0.570  0.139  0.895  1.0
  Cr  Cr5  1  0.861  0.430  0.895  1.0
  Cr  Cr6  1  0.570  0.430  0.605  1.0
  Cr  Cr7  1  0.570  0.139  0.605  1.0
  Cr  Cr8  1  0.861  0.430  0.605  1.0
  Cr  Cr9  1  0.430  0.570  0.395  1.0
  Cr  Cr10  1  0.430  0.861  0.395  1.0
  Cr  Cr11  1  0.139  0.570  0.395  1.0
  N  N12  1  0.000  0.500  0.000  1.0
  N  N13  1  0.500  0.500  0.000  1.0
  N  N14  1  0.500  0.000  0.000  1.0
  N  N15  1  0.000  0.500  0.500  1.0
  N  N16  1  0.500  0.500  0.500  1.0
  N  N17  1  0.500  0.000  0.500  1.0
  N  N18  1  0.514  0.757  0.084  1.0
  N  N19  1  0.243  0.757  0.084  1.0
  N  N20  1  0.243  0.486  0.084  1.0
  N  N21  1  0.486  0.243  0.916  1.0
  N  N22  1  0.757  0.243  0.916  1.0
  N  N23  1  0.757  0.514  0.916  1.0
  N  N24  1  0.486  0.243  0.584  1.0
  N  N25  1  0.757  0.243  0.584  1.0
  N  N26  1  0.757  0.514  0.584  1.0
  N  N27  1  0.514  0.757  0.416  1.0
  N  N28  1  0.243  0.757  0.416  1.0
  N  N29  1  0.243  0.486  0.416  1.0
  N  N30  1  0.934  0.467  0.750  1.0
  N  N31  1  0.533  0.467  0.750  1.0
  N  N32  1  0.533  0.066  0.750  1.0
  N  N33  1  0.066  0.533  0.250  1.0
  N  N34  1  0.467  0.533  0.250  1.0
  N  N35  1  0.467  0.934  0.250  1.0
[/CIF]
.
The structure described by CrN2 crystallizes in the hexagonal P6_3/mmc space group. Cr(1) is bonded to one N(1), one N(3), and two equivalent N(2) atoms to form corner-sharing CrN4 tetrahedra. There are three inequivalent N sites. In the first N site, N(2) is bonded in a bent 120 degrees geometry to two equivalent Cr(1) atoms. In the second N site, N(1) is bonded in a linear geometry to two equivalent Cr(1) atoms. In the third N site, N(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Cr(1) atoms. is represented by the CIF file [CIF]
data_CrN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.587
_cell_length_b   10.587
_cell_length_c   11.043
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   1071.888
_cell_formula_units_Z   12
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  0.430  0.570  0.105  1.0
  Cr  Cr1  1  0.430  0.861  0.105  1.0
  Cr  Cr2  1  0.139  0.570  0.105  1.0
  Cr  Cr3  1  0.570  0.430  0.895  1.0
  Cr  Cr4  1  0.570  0.139  0.895  1.0
  Cr  Cr5  1  0.861  0.430  0.895  1.0
  Cr  Cr6  1  0.570  0.430  0.605  1.0
  Cr  Cr7  1  0.570  0.139  0.605  1.0
  Cr  Cr8  1  0.861  0.430  0.605  1.0
  Cr  Cr9  1  0.430  0.570  0.395  1.0
  Cr  Cr10  1  0.430  0.861  0.395  1.0
  Cr  Cr11  1  0.139  0.570  0.395  1.0
  N  N12  1  0.000  0.500  0.000  1.0
  N  N13  1  0.500  0.500  0.000  1.0
  N  N14  1  0.500  0.000  0.000  1.0
  N  N15  1  0.000  0.500  0.500  1.0
  N  N16  1  0.500  0.500  0.500  1.0
  N  N17  1  0.500  0.000  0.500  1.0
  N  N18  1  0.514  0.757  0.084  1.0
  N  N19  1  0.243  0.757  0.084  1.0
  N  N20  1  0.243  0.486  0.084  1.0
  N  N21  1  0.486  0.243  0.916  1.0
  N  N22  1  0.757  0.243  0.916  1.0
  N  N23  1  0.757  0.514  0.916  1.0
  N  N24  1  0.486  0.243  0.584  1.0
  N  N25  1  0.757  0.243  0.584  1.0
  N  N26  1  0.757  0.514  0.584  1.0
  N  N27  1  0.514  0.757  0.416  1.0
  N  N28  1  0.243  0.757  0.416  1.0
  N  N29  1  0.243  0.486  0.416  1.0
  N  N30  1  0.934  0.467  0.750  1.0
  N  N31  1  0.533  0.467  0.750  1.0
  N  N32  1  0.533  0.066  0.750  1.0
  N  N33  1  0.066  0.533  0.250  1.0
  N  N34  1  0.467  0.533  0.250  1.0
  N  N35  1  0.467  0.934  0.250  1.0
[/CIF]
.