The structure described by ErCu3Ga2 crystallizes in the orthorhombic Cmmm space group. Er(1) is bonded in a 18-coordinate geometry to four equivalent Cu(2), six equivalent Cu(1), and eight equivalent Ga(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(2) is bonded to four equivalent Er(1), four equivalent Cu(1), and four equivalent Ga(1) atoms to form distorted CuEr4Ga4Cu4 cuboctahedra that share corners with eight equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, corners with eight equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, edges with two equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, edges with eight equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, faces with two equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, and faces with eight equivalent Ga(1)Er4Ga2Cu6 cuboctahedra. In the second Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Er(1), two equivalent Cu(2), and four equivalent Ga(1) atoms. Ga(1) is bonded to four equivalent Er(1), two equivalent Cu(2), four equivalent Cu(1), and two equivalent Ga(1) atoms to form distorted GaEr4Ga2Cu6 cuboctahedra that share corners with four equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, corners with twelve equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, edges with four equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, edges with six equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, faces with four equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, and faces with six equivalent Ga(1)Er4Ga2Cu6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErGa2Cu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.048
_cell_length_b   5.048
_cell_length_c   4.069
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.552
_symmetry_Int_Tables_number   1
_cell_volume   91.067
_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
  Er  Er0  1  0.500  0.500  0.000  1.0
  Ga  Ga1  1  0.000  0.500  0.500  1.0
  Ga  Ga2  1  0.500  0.000  0.500  1.0
  Cu  Cu3  1  0.162  0.838  0.000  1.0
  Cu  Cu4  1  0.838  0.162  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.500  1.0
[/CIF]
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The structure described by ErCu3Ga2 crystallizes in the orthorhombic Cmmm space group. Er(1) is bonded in a 18-coordinate geometry to four equivalent Cu(2), six equivalent Cu(1), and eight equivalent Ga(1) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(2) is bonded to four equivalent Er(1), four equivalent Cu(1), and four equivalent Ga(1) atoms to form distorted CuEr4Ga4Cu4 cuboctahedra that share corners with eight equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, corners with eight equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, edges with two equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, edges with eight equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, faces with two equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, and faces with eight equivalent Ga(1)Er4Ga2Cu6 cuboctahedra. In the second Cu site, Cu(1) is bonded in a 9-coordinate geometry to three equivalent Er(1), two equivalent Cu(2), and four equivalent Ga(1) atoms. Ga(1) is bonded to four equivalent Er(1), two equivalent Cu(2), four equivalent Cu(1), and two equivalent Ga(1) atoms to form distorted GaEr4Ga2Cu6 cuboctahedra that share corners with four equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, corners with twelve equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, edges with four equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, edges with six equivalent Ga(1)Er4Ga2Cu6 cuboctahedra, faces with four equivalent Cu(2)Er4Ga4Cu4 cuboctahedra, and faces with six equivalent Ga(1)Er4Ga2Cu6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_ErGa2Cu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.048
_cell_length_b   5.048
_cell_length_c   4.069
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.552
_symmetry_Int_Tables_number   1
_cell_volume   91.067
_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
  Er  Er0  1  0.500  0.500  0.000  1.0
  Ga  Ga1  1  0.000  0.500  0.500  1.0
  Ga  Ga2  1  0.500  0.000  0.500  1.0
  Cu  Cu3  1  0.162  0.838  0.000  1.0
  Cu  Cu4  1  0.838  0.162  0.000  1.0
  Cu  Cu5  1  0.000  0.000  0.500  1.0
[/CIF]
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