The material described by Cs2NpO4 is (La,Ba)CuO4-like structured and crystallizes in the tetragonal I4/mmm space group. Cs(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Np(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing NpO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted linear geometry to four equivalent Cs(1) and two equivalent Np(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to five equivalent Cs(1) and one Np(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs2NpO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.366
_cell_length_b   4.366
_cell_length_c   8.070
_cell_angle_alpha   105.700
_cell_angle_beta   105.695
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   142.128
_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
  Cs  Cs0  1  0.344  0.344  0.688  1.0
  Cs  Cs1  1  0.656  0.656  0.312  1.0
  Np  Np2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.128  0.128  0.256  1.0
  O  O4  1  0.872  0.872  0.744  1.0
  O  O5  1  0.000  0.500  0.000  1.0
  O  O6  1  0.500  0.000  0.000  1.0
[/CIF]
.
The material described by Cs2NpO4 is (La,Ba)CuO4-like structured and crystallizes in the tetragonal I4/mmm space group. Cs(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Np(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing NpO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted linear geometry to four equivalent Cs(1) and two equivalent Np(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to five equivalent Cs(1) and one Np(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs2NpO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.366
_cell_length_b   4.366
_cell_length_c   8.070
_cell_angle_alpha   105.700
_cell_angle_beta   105.695
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   142.128
_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
  Cs  Cs0  1  0.344  0.344  0.688  1.0
  Cs  Cs1  1  0.656  0.656  0.312  1.0
  Np  Np2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.128  0.128  0.256  1.0
  O  O4  1  0.872  0.872  0.744  1.0
  O  O5  1  0.000  0.500  0.000  1.0
  O  O6  1  0.500  0.000  0.000  1.0
[/CIF]
.