The material structure described by CrNCN crystallizes in the hexagonal P6_3/mmc space group. Cr(1) is bonded to six equivalent N(1) atoms to form edge-sharing CrN6 octahedra. C(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to three equivalent Cr(1) and one C(1) atom to form a mixture of distorted corner and edge-sharing NCr3C trigonal pyramids. is represented by the CIF card [CIF]
data_CrCN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.225
_cell_length_b   3.225
_cell_length_c   9.559
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   86.102
_cell_formula_units_Z   2
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  0.000  0.000  0.000  1.0
  Cr  Cr1  1  0.000  0.000  0.500  1.0
  C  C2  1  0.667  0.333  0.250  1.0
  C  C3  1  0.333  0.667  0.750  1.0
  N  N4  1  0.667  0.333  0.120  1.0
  N  N5  1  0.333  0.667  0.880  1.0
  N  N6  1  0.333  0.667  0.620  1.0
  N  N7  1  0.667  0.333  0.380  1.0
[/CIF]
.
The material structure described by CrNCN crystallizes in the hexagonal P6_3/mmc space group. Cr(1) is bonded to six equivalent N(1) atoms to form edge-sharing CrN6 octahedra. C(1) is bonded in a linear geometry to two equivalent N(1) atoms. N(1) is bonded to three equivalent Cr(1) and one C(1) atom to form a mixture of distorted corner and edge-sharing NCr3C trigonal pyramids. is represented by the CIF card [CIF]
data_CrCN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.225
_cell_length_b   3.225
_cell_length_c   9.559
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   86.102
_cell_formula_units_Z   2
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  0.000  0.000  0.000  1.0
  Cr  Cr1  1  0.000  0.000  0.500  1.0
  C  C2  1  0.667  0.333  0.250  1.0
  C  C3  1  0.333  0.667  0.750  1.0
  N  N4  1  0.667  0.333  0.120  1.0
  N  N5  1  0.333  0.667  0.880  1.0
  N  N6  1  0.333  0.667  0.620  1.0
  N  N7  1  0.667  0.333  0.380  1.0
[/CIF]
.