The material described by Eu(CdAs)2 crystallizes in the trigonal P-3m1 space group. Eu(1) is bonded to six equivalent As(1) atoms to form EuAs6 octahedra that share corners with twelve equivalent Cd(1)As4 tetrahedra, edges with six equivalent Eu(1)As6 octahedra, and edges with six equivalent Cd(1)As4 tetrahedra. Cd(1) is bonded to four equivalent As(1) atoms to form CdAs4 tetrahedra that share corners with six equivalent Eu(1)As6 octahedra, corners with six equivalent Cd(1)As4 tetrahedra, edges with three equivalent Eu(1)As6 octahedra, and edges with three equivalent Cd(1)As4 tetrahedra. The corner-sharing octahedral tilt angles range from 16-55°. As(1) is bonded to three equivalent Eu(1) and four equivalent Cd(1) atoms to form a mixture of distorted edge and corner-sharing AsEu3Cd4 pentagonal bipyramids. is represented by the CIF card [CIF]
data_Eu(CdAs)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.470
_cell_length_b   4.470
_cell_length_c   7.278
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   125.952
_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
  Cd  Cd1  1  0.667  0.333  0.365  1.0
  Cd  Cd2  1  0.333  0.667  0.635  1.0
  As  As3  1  0.667  0.333  0.756  1.0
  As  As4  1  0.333  0.667  0.244  1.0
[/CIF]
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The material described by Eu(CdAs)2 crystallizes in the trigonal P-3m1 space group. Eu(1) is bonded to six equivalent As(1) atoms to form EuAs6 octahedra that share corners with twelve equivalent Cd(1)As4 tetrahedra, edges with six equivalent Eu(1)As6 octahedra, and edges with six equivalent Cd(1)As4 tetrahedra. Cd(1) is bonded to four equivalent As(1) atoms to form CdAs4 tetrahedra that share corners with six equivalent Eu(1)As6 octahedra, corners with six equivalent Cd(1)As4 tetrahedra, edges with three equivalent Eu(1)As6 octahedra, and edges with three equivalent Cd(1)As4 tetrahedra. The corner-sharing octahedral tilt angles range from 16-55°. As(1) is bonded to three equivalent Eu(1) and four equivalent Cd(1) atoms to form a mixture of distorted edge and corner-sharing AsEu3Cd4 pentagonal bipyramids. is represented by the CIF card [CIF]
data_Eu(CdAs)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.470
_cell_length_b   4.470
_cell_length_c   7.278
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   125.952
_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
  Cd  Cd1  1  0.667  0.333  0.365  1.0
  Cd  Cd2  1  0.333  0.667  0.635  1.0
  As  As3  1  0.667  0.333  0.756  1.0
  As  As4  1  0.333  0.667  0.244  1.0
[/CIF]
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