The structure described by UCeN2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. U(1) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form UN6 octahedra that share corners with six equivalent U(1)N6 octahedra, edges with four equivalent U(1)N6 octahedra, and edges with eight equivalent Ce(1)N6 octahedra. The corner-sharing octahedra are not tilted. Ce(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form CeN6 octahedra that share corners with six equivalent Ce(1)N6 octahedra, edges with four equivalent Ce(1)N6 octahedra, and edges with eight equivalent U(1)N6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent N sites. In the first N site, N(1) is bonded to two equivalent U(1) and four equivalent Ce(1) atoms to form NCe4U2 octahedra that share corners with six equivalent N(1)Ce4U2 octahedra, edges with four equivalent N(1)Ce4U2 octahedra, and edges with eight equivalent N(2)Ce2U4 octahedra. The corner-sharing octahedra are not tilted. In the second N site, N(2) is bonded to four equivalent U(1) and two equivalent Ce(1) atoms to form NCe2U4 octahedra that share corners with six equivalent N(2)Ce2U4 octahedra, edges with four equivalent N(2)Ce2U4 octahedra, and edges with eight equivalent N(1)Ce4U2 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_CeUN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.487
_cell_length_b   3.487
_cell_length_c   4.931
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   59.977
_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
  Ce  Ce0  1  0.500  0.500  0.500  1.0
  U  U1  1  0.000  0.000  0.000  1.0
  N  N2  1  0.000  0.000  0.500  1.0
  N  N3  1  0.500  0.500  0.000  1.0
[/CIF]
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The structure described by UCeN2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. U(1) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form UN6 octahedra that share corners with six equivalent U(1)N6 octahedra, edges with four equivalent U(1)N6 octahedra, and edges with eight equivalent Ce(1)N6 octahedra. The corner-sharing octahedra are not tilted. Ce(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form CeN6 octahedra that share corners with six equivalent Ce(1)N6 octahedra, edges with four equivalent Ce(1)N6 octahedra, and edges with eight equivalent U(1)N6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent N sites. In the first N site, N(1) is bonded to two equivalent U(1) and four equivalent Ce(1) atoms to form NCe4U2 octahedra that share corners with six equivalent N(1)Ce4U2 octahedra, edges with four equivalent N(1)Ce4U2 octahedra, and edges with eight equivalent N(2)Ce2U4 octahedra. The corner-sharing octahedra are not tilted. In the second N site, N(2) is bonded to four equivalent U(1) and two equivalent Ce(1) atoms to form NCe2U4 octahedra that share corners with six equivalent N(2)Ce2U4 octahedra, edges with four equivalent N(2)Ce2U4 octahedra, and edges with eight equivalent N(1)Ce4U2 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_CeUN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.487
_cell_length_b   3.487
_cell_length_c   4.931
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   59.977
_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
  Ce  Ce0  1  0.500  0.500  0.500  1.0
  U  U1  1  0.000  0.000  0.000  1.0
  N  N2  1  0.000  0.000  0.500  1.0
  N  N3  1  0.500  0.500  0.000  1.0
[/CIF]
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