The crystal structure described by GdCu9In2 crystallizes in the tetragonal P4/mbm space group. Gd(1) is bonded in a 20-coordinate geometry to eight equivalent Cu(2), eight equivalent Cu(3), and four equivalent In(1) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Cu(2), four equivalent Cu(3), and four equivalent In(1) atoms to form CuIn4Cu8 cuboctahedra that share corners with four equivalent Cu(3)Gd2In3Cu7 cuboctahedra, corners with twelve equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with two equivalent Cu(1)In4Cu8 cuboctahedra, faces with eight equivalent Cu(2)Gd2In2Cu8 cuboctahedra, and faces with twelve equivalent Cu(3)Gd2In3Cu7 cuboctahedra. In the second Cu site, Cu(2) is bonded to two equivalent Gd(1), one Cu(1), three equivalent Cu(2), four equivalent Cu(3), and two equivalent In(1) atoms to form distorted CuGd2In2Cu8 cuboctahedra that share corners with three equivalent Cu(1)In4Cu8 cuboctahedra, corners with six equivalent Cu(3)Gd2In3Cu7 cuboctahedra, corners with eleven equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with two equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with four equivalent Cu(3)Gd2In3Cu7 cuboctahedra, faces with two equivalent Cu(1)In4Cu8 cuboctahedra, faces with seven equivalent Cu(2)Gd2In2Cu8 cuboctahedra, and faces with ten equivalent Cu(3)Gd2In3Cu7 cuboctahedra. In the third Cu site, Cu(3) is bonded to two equivalent Gd(1), one Cu(1), two equivalent Cu(3), four equivalent Cu(2), and three equivalent In(1) atoms to form distorted CuGd2In3Cu7 cuboctahedra that share  a cornercorner with one Cu(1)In4Cu8 cuboctahedra, corners with six equivalent Cu(2)Gd2In2Cu8 cuboctahedra, corners with eleven equivalent Cu(3)Gd2In3Cu7 cuboctahedra, edges with four equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with five equivalent Cu(3)Gd2In3Cu7 cuboctahedra, faces with three equivalent Cu(1)In4Cu8 cuboctahedra, faces with seven equivalent Cu(3)Gd2In3Cu7 cuboctahedra, and faces with ten equivalent Cu(2)Gd2In2Cu8 cuboctahedra. In(1) is bonded in a 15-coordinate geometry to two equivalent Gd(1), two equivalent Cu(1), four equivalent Cu(2), six equivalent Cu(3), and one In(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_GdIn2Cu9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.448
_cell_length_b   8.448
_cell_length_c   5.039
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   359.601
_cell_formula_units_Z   2
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
  Gd  Gd0  1  0.000  0.000  0.000  1.0
  Gd  Gd1  1  0.500  0.500  0.000  1.0
  In  In2  1  0.124  0.624  0.000  1.0
  In  In3  1  0.876  0.376  0.000  1.0
  In  In4  1  0.624  0.876  0.000  1.0
  In  In5  1  0.376  0.124  0.000  1.0
  Cu  Cu6  1  0.500  0.000  0.500  1.0
  Cu  Cu7  1  0.000  0.500  0.500  1.0
  Cu  Cu8  1  0.203  0.063  0.500  1.0
  Cu  Cu9  1  0.797  0.937  0.500  1.0
  Cu  Cu10  1  0.063  0.797  0.500  1.0
  Cu  Cu11  1  0.703  0.437  0.500  1.0
  Cu  Cu12  1  0.937  0.203  0.500  1.0
  Cu  Cu13  1  0.297  0.563  0.500  1.0
  Cu  Cu14  1  0.563  0.703  0.500  1.0
  Cu  Cu15  1  0.437  0.297  0.500  1.0
  Cu  Cu16  1  0.677  0.177  0.246  1.0
  Cu  Cu17  1  0.323  0.823  0.754  1.0
  Cu  Cu18  1  0.323  0.823  0.246  1.0
  Cu  Cu19  1  0.177  0.323  0.246  1.0
  Cu  Cu20  1  0.177  0.323  0.754  1.0
  Cu  Cu21  1  0.677  0.177  0.754  1.0
  Cu  Cu22  1  0.823  0.677  0.754  1.0
  Cu  Cu23  1  0.823  0.677  0.246  1.0
[/CIF]
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The crystal structure described by GdCu9In2 crystallizes in the tetragonal P4/mbm space group. Gd(1) is bonded in a 20-coordinate geometry to eight equivalent Cu(2), eight equivalent Cu(3), and four equivalent In(1) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Cu(2), four equivalent Cu(3), and four equivalent In(1) atoms to form CuIn4Cu8 cuboctahedra that share corners with four equivalent Cu(3)Gd2In3Cu7 cuboctahedra, corners with twelve equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with two equivalent Cu(1)In4Cu8 cuboctahedra, faces with eight equivalent Cu(2)Gd2In2Cu8 cuboctahedra, and faces with twelve equivalent Cu(3)Gd2In3Cu7 cuboctahedra. In the second Cu site, Cu(2) is bonded to two equivalent Gd(1), one Cu(1), three equivalent Cu(2), four equivalent Cu(3), and two equivalent In(1) atoms to form distorted CuGd2In2Cu8 cuboctahedra that share corners with three equivalent Cu(1)In4Cu8 cuboctahedra, corners with six equivalent Cu(3)Gd2In3Cu7 cuboctahedra, corners with eleven equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with two equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with four equivalent Cu(3)Gd2In3Cu7 cuboctahedra, faces with two equivalent Cu(1)In4Cu8 cuboctahedra, faces with seven equivalent Cu(2)Gd2In2Cu8 cuboctahedra, and faces with ten equivalent Cu(3)Gd2In3Cu7 cuboctahedra. In the third Cu site, Cu(3) is bonded to two equivalent Gd(1), one Cu(1), two equivalent Cu(3), four equivalent Cu(2), and three equivalent In(1) atoms to form distorted CuGd2In3Cu7 cuboctahedra that share  a cornercorner with one Cu(1)In4Cu8 cuboctahedra, corners with six equivalent Cu(2)Gd2In2Cu8 cuboctahedra, corners with eleven equivalent Cu(3)Gd2In3Cu7 cuboctahedra, edges with four equivalent Cu(2)Gd2In2Cu8 cuboctahedra, edges with five equivalent Cu(3)Gd2In3Cu7 cuboctahedra, faces with three equivalent Cu(1)In4Cu8 cuboctahedra, faces with seven equivalent Cu(3)Gd2In3Cu7 cuboctahedra, and faces with ten equivalent Cu(2)Gd2In2Cu8 cuboctahedra. In(1) is bonded in a 15-coordinate geometry to two equivalent Gd(1), two equivalent Cu(1), four equivalent Cu(2), six equivalent Cu(3), and one In(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_GdIn2Cu9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.448
_cell_length_b   8.448
_cell_length_c   5.039
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   359.601
_cell_formula_units_Z   2
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
  Gd  Gd0  1  0.000  0.000  0.000  1.0
  Gd  Gd1  1  0.500  0.500  0.000  1.0
  In  In2  1  0.124  0.624  0.000  1.0
  In  In3  1  0.876  0.376  0.000  1.0
  In  In4  1  0.624  0.876  0.000  1.0
  In  In5  1  0.376  0.124  0.000  1.0
  Cu  Cu6  1  0.500  0.000  0.500  1.0
  Cu  Cu7  1  0.000  0.500  0.500  1.0
  Cu  Cu8  1  0.203  0.063  0.500  1.0
  Cu  Cu9  1  0.797  0.937  0.500  1.0
  Cu  Cu10  1  0.063  0.797  0.500  1.0
  Cu  Cu11  1  0.703  0.437  0.500  1.0
  Cu  Cu12  1  0.937  0.203  0.500  1.0
  Cu  Cu13  1  0.297  0.563  0.500  1.0
  Cu  Cu14  1  0.563  0.703  0.500  1.0
  Cu  Cu15  1  0.437  0.297  0.500  1.0
  Cu  Cu16  1  0.677  0.177  0.246  1.0
  Cu  Cu17  1  0.323  0.823  0.754  1.0
  Cu  Cu18  1  0.323  0.823  0.246  1.0
  Cu  Cu19  1  0.177  0.323  0.246  1.0
  Cu  Cu20  1  0.177  0.323  0.754  1.0
  Cu  Cu21  1  0.677  0.177  0.754  1.0
  Cu  Cu22  1  0.823  0.677  0.754  1.0
  Cu  Cu23  1  0.823  0.677  0.246  1.0
[/CIF]
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