The material structure described by CeCu4Al crystallizes in the orthorhombic Cmmm space group. Ce(1) is bonded in a 18-coordinate geometry to six equivalent Cu(1), eight equivalent Cu(2), and four equivalent Al(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), four equivalent Cu(2), and two equivalent Al(1) atoms. In the second Cu site, Cu(2) is bonded to four equivalent Ce(1), two equivalent Cu(2), four equivalent Cu(1), and two equivalent Al(1) atoms to form distorted CuCe4Al2Cu6 cuboctahedra that share corners with four equivalent Al(1)Ce4Cu8 cuboctahedra, corners with twelve equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, edges with four equivalent Al(1)Ce4Cu8 cuboctahedra, edges with six equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, faces with four equivalent Al(1)Ce4Cu8 cuboctahedra, and faces with six equivalent Cu(2)Ce4Al2Cu6 cuboctahedra. Al(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Cu(2) atoms to form distorted AlCe4Cu8 cuboctahedra that share corners with eight equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, corners with eight equivalent Al(1)Ce4Cu8 cuboctahedra, edges with two equivalent Al(1)Ce4Cu8 cuboctahedra, edges with eight equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, faces with two equivalent Al(1)Ce4Cu8 cuboctahedra, and faces with eight equivalent Cu(2)Ce4Al2Cu6 cuboctahedra. is represented by the CIF card [CIF]
data_CeAlCu4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.090
_cell_length_b   5.090
_cell_length_c   4.145
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.312
_symmetry_Int_Tables_number   1
_cell_volume   93.624
_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  0.000  1.0
  Al  Al1  1  0.000  0.000  0.500  1.0
  Cu  Cu2  1  0.167  0.833  0.000  1.0
  Cu  Cu3  1  0.833  0.167  0.000  1.0
  Cu  Cu4  1  0.000  0.500  0.500  1.0
  Cu  Cu5  1  0.500  0.000  0.500  1.0
[/CIF]
.
The material structure described by CeCu4Al crystallizes in the orthorhombic Cmmm space group. Ce(1) is bonded in a 18-coordinate geometry to six equivalent Cu(1), eight equivalent Cu(2), and four equivalent Al(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), four equivalent Cu(2), and two equivalent Al(1) atoms. In the second Cu site, Cu(2) is bonded to four equivalent Ce(1), two equivalent Cu(2), four equivalent Cu(1), and two equivalent Al(1) atoms to form distorted CuCe4Al2Cu6 cuboctahedra that share corners with four equivalent Al(1)Ce4Cu8 cuboctahedra, corners with twelve equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, edges with four equivalent Al(1)Ce4Cu8 cuboctahedra, edges with six equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, faces with four equivalent Al(1)Ce4Cu8 cuboctahedra, and faces with six equivalent Cu(2)Ce4Al2Cu6 cuboctahedra. Al(1) is bonded to four equivalent Ce(1), four equivalent Cu(1), and four equivalent Cu(2) atoms to form distorted AlCe4Cu8 cuboctahedra that share corners with eight equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, corners with eight equivalent Al(1)Ce4Cu8 cuboctahedra, edges with two equivalent Al(1)Ce4Cu8 cuboctahedra, edges with eight equivalent Cu(2)Ce4Al2Cu6 cuboctahedra, faces with two equivalent Al(1)Ce4Cu8 cuboctahedra, and faces with eight equivalent Cu(2)Ce4Al2Cu6 cuboctahedra. is represented by the CIF card [CIF]
data_CeAlCu4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.090
_cell_length_b   5.090
_cell_length_c   4.145
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.312
_symmetry_Int_Tables_number   1
_cell_volume   93.624
_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  0.000  1.0
  Al  Al1  1  0.000  0.000  0.500  1.0
  Cu  Cu2  1  0.167  0.833  0.000  1.0
  Cu  Cu3  1  0.833  0.167  0.000  1.0
  Cu  Cu4  1  0.000  0.500  0.500  1.0
  Cu  Cu5  1  0.500  0.000  0.500  1.0
[/CIF]
.