The material described by Eu(Cu2As)2 crystallizes in the trigonal R-3m space group. Eu(1) is bonded to six equivalent As(1) atoms to form distorted edge-sharing EuAs6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to three equivalent As(1) atoms. In the second Cu site, Cu(2) is bonded in a distorted single-bond geometry to four equivalent As(1) atoms. As(1) is bonded in a 10-coordinate geometry to three equivalent Eu(1), three equivalent Cu(1), and four equivalent Cu(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu(Cu2As)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.041
_cell_length_b   8.041
_cell_length_c   8.041
_cell_angle_alpha   29.796
_cell_angle_beta   29.796
_cell_angle_gamma   29.796
_symmetry_Int_Tables_number   1
_cell_volume   113.663
_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
  Eu  Eu0  1  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.440  0.440  0.440  1.0
  Cu  Cu2  1  0.146  0.146  0.146  1.0
  Cu  Cu3  1  0.560  0.560  0.560  1.0
  Cu  Cu4  1  0.854  0.854  0.854  1.0
  As  As5  1  0.251  0.251  0.251  1.0
  As  As6  1  0.749  0.749  0.749  1.0
[/CIF]
.
The material described by Eu(Cu2As)2 crystallizes in the trigonal R-3m space group. Eu(1) is bonded to six equivalent As(1) atoms to form distorted edge-sharing EuAs6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to three equivalent As(1) atoms. In the second Cu site, Cu(2) is bonded in a distorted single-bond geometry to four equivalent As(1) atoms. As(1) is bonded in a 10-coordinate geometry to three equivalent Eu(1), three equivalent Cu(1), and four equivalent Cu(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu(Cu2As)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.041
_cell_length_b   8.041
_cell_length_c   8.041
_cell_angle_alpha   29.796
_cell_angle_beta   29.796
_cell_angle_gamma   29.796
_symmetry_Int_Tables_number   1
_cell_volume   113.663
_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
  Eu  Eu0  1  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.440  0.440  0.440  1.0
  Cu  Cu2  1  0.146  0.146  0.146  1.0
  Cu  Cu3  1  0.560  0.560  0.560  1.0
  Cu  Cu4  1  0.854  0.854  0.854  1.0
  As  As5  1  0.251  0.251  0.251  1.0
  As  As6  1  0.749  0.749  0.749  1.0
[/CIF]
.