The structure described by CoAlN2 is Enargite-like structured and crystallizes in the orthorhombic Pna2_1 space group. Co(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form CoN4 tetrahedra that share corners with four equivalent Co(1)N4 tetrahedra and corners with eight equivalent Al(1)N4 tetrahedra. Al(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form AlN4 tetrahedra that share corners with four equivalent Al(1)N4 tetrahedra and corners with eight equivalent Co(1)N4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded to two equivalent Co(1) and two equivalent Al(1) atoms to form corner-sharing NAl2Co2 tetrahedra. In the second N site, N(2) is bonded to two equivalent Co(1) and two equivalent Al(1) atoms to form corner-sharing NAl2Co2 tetrahedra. is represented by the CIF card [CIF]
data_AlCoN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.395
_cell_length_b   6.303
_cell_length_c   4.881
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   165.973
_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
  Al  Al0  1  0.588  0.375  0.001  1.0
  Al  Al1  1  0.412  0.625  0.501  1.0
  Al  Al2  1  0.912  0.875  0.501  1.0
  Al  Al3  1  0.088  0.125  0.001  1.0
  Co  Co4  1  0.579  0.877  0.995  1.0
  Co  Co5  1  0.421  0.123  0.495  1.0
  Co  Co6  1  0.921  0.377  0.495  1.0
  Co  Co7  1  0.079  0.623  0.995  1.0
  N  N8  1  0.584  0.377  0.395  1.0
  N  N9  1  0.416  0.623  0.895  1.0
  N  N10  1  0.916  0.877  0.895  1.0
  N  N11  1  0.084  0.123  0.395  1.0
  N  N12  1  0.582  0.870  0.379  1.0
  N  N13  1  0.418  0.130  0.879  1.0
  N  N14  1  0.918  0.370  0.879  1.0
  N  N15  1  0.082  0.630  0.379  1.0
[/CIF]
.
The structure described by CoAlN2 is Enargite-like structured and crystallizes in the orthorhombic Pna2_1 space group. Co(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form CoN4 tetrahedra that share corners with four equivalent Co(1)N4 tetrahedra and corners with eight equivalent Al(1)N4 tetrahedra. Al(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form AlN4 tetrahedra that share corners with four equivalent Al(1)N4 tetrahedra and corners with eight equivalent Co(1)N4 tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded to two equivalent Co(1) and two equivalent Al(1) atoms to form corner-sharing NAl2Co2 tetrahedra. In the second N site, N(2) is bonded to two equivalent Co(1) and two equivalent Al(1) atoms to form corner-sharing NAl2Co2 tetrahedra. is represented by the CIF card [CIF]
data_AlCoN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.395
_cell_length_b   6.303
_cell_length_c   4.881
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   165.973
_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
  Al  Al0  1  0.588  0.375  0.001  1.0
  Al  Al1  1  0.412  0.625  0.501  1.0
  Al  Al2  1  0.912  0.875  0.501  1.0
  Al  Al3  1  0.088  0.125  0.001  1.0
  Co  Co4  1  0.579  0.877  0.995  1.0
  Co  Co5  1  0.421  0.123  0.495  1.0
  Co  Co6  1  0.921  0.377  0.495  1.0
  Co  Co7  1  0.079  0.623  0.995  1.0
  N  N8  1  0.584  0.377  0.395  1.0
  N  N9  1  0.416  0.623  0.895  1.0
  N  N10  1  0.916  0.877  0.895  1.0
  N  N11  1  0.084  0.123  0.395  1.0
  N  N12  1  0.582  0.870  0.379  1.0
  N  N13  1  0.418  0.130  0.879  1.0
  N  N14  1  0.918  0.370  0.879  1.0
  N  N15  1  0.082  0.630  0.379  1.0
[/CIF]
.