The structure described by LaCu4 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the tetragonal I-4m2 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to four equivalent Cu(1), four equivalent Cu(6), and eight equivalent Cu(8) atoms. In the second La site, La(2) is bonded in a 14-coordinate geometry to two equivalent Cu(2), two equivalent Cu(3), two equivalent Cu(4), four equivalent Cu(7), and four equivalent Cu(8) atoms. In the third La site, La(3) is bonded in a 16-coordinate geometry to two equivalent Cu(3), two equivalent Cu(4), two equivalent Cu(5), two equivalent Cu(6), four equivalent Cu(1), and four equivalent Cu(8) atoms. In the fourth La site, La(4) is bonded in a 16-coordinate geometry to two equivalent Cu(1), two equivalent Cu(4), two equivalent Cu(6), two equivalent Cu(7), two equivalent Cu(8), three equivalent Cu(2), and three equivalent Cu(5) atoms. There are eight inequivalent Cu sites. In the first Cu site, Cu(5) is bonded in a 10-coordinate geometry to one La(3), three equivalent La(4), one Cu(4), two equivalent Cu(1), and three equivalent Cu(5) atoms. In the second Cu site, Cu(6) is bonded in a 9-coordinate geometry to one La(1), one La(3), two equivalent La(4), one Cu(2), two equivalent Cu(1), and two equivalent Cu(8) atoms. In the third Cu site, Cu(7) is bonded to two equivalent La(2), two equivalent La(4), two equivalent Cu(2), two equivalent Cu(3), two equivalent Cu(4), and two equivalent Cu(8) atoms to form CuLa4Cu8 cuboctahedra that share corners with two equivalent Cu(3)La2Cu10 cuboctahedra, corners with two equivalent Cu(4)La4Cu8 cuboctahedra, corners with two equivalent Cu(7)La4Cu8 cuboctahedra, edges with two equivalent Cu(4)La4Cu8 cuboctahedra, faces with two equivalent Cu(4)La4Cu8 cuboctahedra, faces with four equivalent Cu(3)La2Cu10 cuboctahedra, and faces with four equivalent Cu(7)La4Cu8 cuboctahedra. In the fourth Cu site, Cu(8) is bonded in a 10-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one Cu(1), one Cu(3), one Cu(4), one Cu(6), one Cu(7), and one Cu(8) atom. In the fifth Cu site, Cu(1) is bonded in a 11-coordinate geometry to one La(1), two equivalent La(3), two equivalent La(4), two equivalent Cu(5), two equivalent Cu(6), and two equivalent Cu(8) atoms. In the sixth Cu site, Cu(2) is bonded in a 10-coordinate geometry to one La(2), three equivalent La(4), one Cu(6), two equivalent Cu(7), and three equivalent Cu(2) atoms. In the seventh Cu site, Cu(3) is bonded to one La(2), one La(3), two equivalent Cu(7), two equivalent Cu(8), three equivalent Cu(3), and three equivalent Cu(4) atoms to form CuLa2Cu10 cuboctahedra that share  a cornercorner with one Cu(3)La2Cu10 cuboctahedra,  a cornercorner with one Cu(4)La4Cu8 cuboctahedra, corners with two equivalent Cu(7)La4Cu8 cuboctahedra, faces with three equivalent Cu(3)La2Cu10 cuboctahedra, faces with four equivalent Cu(4)La4Cu8 cuboctahedra, and faces with four equivalent Cu(7)La4Cu8 cuboctahedra. In the eighth Cu site, Cu(4) is bonded to one La(2), one La(3), two equivalent La(4), one Cu(5), two equivalent Cu(7), two equivalent Cu(8), and three equivalent Cu(3) atoms to form CuLa4Cu8 cuboctahedra that share  a cornercorner with one Cu(3)La2Cu10 cuboctahedra, corners with two equivalent Cu(7)La4Cu8 cuboctahedra, edges with two equivalent Cu(7)La4Cu8 cuboctahedra, faces with two equivalent Cu(7)La4Cu8 cuboctahedra, faces with four equivalent Cu(3)La2Cu10 cuboctahedra, and faces with four equivalent Cu(4)La4Cu8 cuboctahedra. is represented by the CIF card [CIF]
data_LaCu4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.837
_cell_length_b   8.837
_cell_length_c   11.392
_cell_angle_alpha   112.823
_cell_angle_beta   112.823
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   743.841
_cell_formula_units_Z   9
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
  La  La0  1  0.000  0.000  0.000  1.0
  La  La1  1  0.206  0.206  0.413  1.0
  La  La2  1  0.794  0.794  0.587  1.0
  La  La3  1  0.051  0.551  0.102  1.0
  La  La4  1  0.449  0.949  0.898  1.0
  La  La5  1  0.619  0.374  0.748  1.0
  La  La6  1  0.626  0.381  0.252  1.0
  La  La7  1  0.626  0.870  0.252  1.0
  La  La8  1  0.130  0.374  0.748  1.0
  Cu  Cu9  1  0.246  0.246  0.000  1.0
  Cu  Cu10  1  0.246  0.754  0.000  1.0
  Cu  Cu11  1  0.754  0.246  0.000  1.0
  Cu  Cu12  1  0.754  0.754  0.000  1.0
  Cu  Cu13  1  0.554  0.210  0.420  1.0
  Cu  Cu14  1  0.790  0.446  0.580  1.0
  Cu  Cu15  1  0.790  0.134  0.580  1.0
  Cu  Cu16  1  0.866  0.210  0.420  1.0
  Cu  Cu17  1  0.151  0.794  0.588  1.0
  Cu  Cu18  1  0.206  0.849  0.412  1.0
  Cu  Cu19  1  0.206  0.563  0.412  1.0
  Cu  Cu20  1  0.437  0.794  0.588  1.0
  Cu  Cu21  1  0.926  0.669  0.339  1.0
  Cu  Cu22  1  0.331  0.074  0.661  1.0
  Cu  Cu23  1  0.331  0.588  0.661  1.0
  Cu  Cu24  1  0.412  0.669  0.339  1.0
  Cu  Cu25  1  0.697  0.541  0.082  1.0
  Cu  Cu26  1  0.459  0.303  0.918  1.0
  Cu  Cu27  1  0.459  0.615  0.918  1.0
  Cu  Cu28  1  0.385  0.541  0.082  1.0
  Cu  Cu29  1  0.363  0.081  0.162  1.0
  Cu  Cu30  1  0.919  0.637  0.838  1.0
  Cu  Cu31  1  0.919  0.201  0.838  1.0
  Cu  Cu32  1  0.799  0.081  0.162  1.0
  Cu  Cu33  1  0.006  0.506  0.500  1.0
  Cu  Cu34  1  0.006  0.994  0.500  1.0
  Cu  Cu35  1  0.494  0.506  0.500  1.0
  Cu  Cu36  1  0.494  0.994  0.500  1.0
  Cu  Cu37  1  0.284  0.358  0.243  1.0
  Cu  Cu38  1  0.115  0.716  0.757  1.0
  Cu  Cu39  1  0.642  0.041  0.757  1.0
  Cu  Cu40  1  0.115  0.041  0.757  1.0
  Cu  Cu41  1  0.642  0.716  0.757  1.0
  Cu  Cu42  1  0.959  0.885  0.243  1.0
  Cu  Cu43  1  0.959  0.358  0.243  1.0
  Cu  Cu44  1  0.284  0.885  0.243  1.0
[/CIF]
.
The structure described by LaCu4 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the tetragonal I-4m2 space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to four equivalent Cu(1), four equivalent Cu(6), and eight equivalent Cu(8) atoms. In the second La site, La(2) is bonded in a 14-coordinate geometry to two equivalent Cu(2), two equivalent Cu(3), two equivalent Cu(4), four equivalent Cu(7), and four equivalent Cu(8) atoms. In the third La site, La(3) is bonded in a 16-coordinate geometry to two equivalent Cu(3), two equivalent Cu(4), two equivalent Cu(5), two equivalent Cu(6), four equivalent Cu(1), and four equivalent Cu(8) atoms. In the fourth La site, La(4) is bonded in a 16-coordinate geometry to two equivalent Cu(1), two equivalent Cu(4), two equivalent Cu(6), two equivalent Cu(7), two equivalent Cu(8), three equivalent Cu(2), and three equivalent Cu(5) atoms. There are eight inequivalent Cu sites. In the first Cu site, Cu(5) is bonded in a 10-coordinate geometry to one La(3), three equivalent La(4), one Cu(4), two equivalent Cu(1), and three equivalent Cu(5) atoms. In the second Cu site, Cu(6) is bonded in a 9-coordinate geometry to one La(1), one La(3), two equivalent La(4), one Cu(2), two equivalent Cu(1), and two equivalent Cu(8) atoms. In the third Cu site, Cu(7) is bonded to two equivalent La(2), two equivalent La(4), two equivalent Cu(2), two equivalent Cu(3), two equivalent Cu(4), and two equivalent Cu(8) atoms to form CuLa4Cu8 cuboctahedra that share corners with two equivalent Cu(3)La2Cu10 cuboctahedra, corners with two equivalent Cu(4)La4Cu8 cuboctahedra, corners with two equivalent Cu(7)La4Cu8 cuboctahedra, edges with two equivalent Cu(4)La4Cu8 cuboctahedra, faces with two equivalent Cu(4)La4Cu8 cuboctahedra, faces with four equivalent Cu(3)La2Cu10 cuboctahedra, and faces with four equivalent Cu(7)La4Cu8 cuboctahedra. In the fourth Cu site, Cu(8) is bonded in a 10-coordinate geometry to one La(1), one La(2), one La(3), one La(4), one Cu(1), one Cu(3), one Cu(4), one Cu(6), one Cu(7), and one Cu(8) atom. In the fifth Cu site, Cu(1) is bonded in a 11-coordinate geometry to one La(1), two equivalent La(3), two equivalent La(4), two equivalent Cu(5), two equivalent Cu(6), and two equivalent Cu(8) atoms. In the sixth Cu site, Cu(2) is bonded in a 10-coordinate geometry to one La(2), three equivalent La(4), one Cu(6), two equivalent Cu(7), and three equivalent Cu(2) atoms. In the seventh Cu site, Cu(3) is bonded to one La(2), one La(3), two equivalent Cu(7), two equivalent Cu(8), three equivalent Cu(3), and three equivalent Cu(4) atoms to form CuLa2Cu10 cuboctahedra that share  a cornercorner with one Cu(3)La2Cu10 cuboctahedra,  a cornercorner with one Cu(4)La4Cu8 cuboctahedra, corners with two equivalent Cu(7)La4Cu8 cuboctahedra, faces with three equivalent Cu(3)La2Cu10 cuboctahedra, faces with four equivalent Cu(4)La4Cu8 cuboctahedra, and faces with four equivalent Cu(7)La4Cu8 cuboctahedra. In the eighth Cu site, Cu(4) is bonded to one La(2), one La(3), two equivalent La(4), one Cu(5), two equivalent Cu(7), two equivalent Cu(8), and three equivalent Cu(3) atoms to form CuLa4Cu8 cuboctahedra that share  a cornercorner with one Cu(3)La2Cu10 cuboctahedra, corners with two equivalent Cu(7)La4Cu8 cuboctahedra, edges with two equivalent Cu(7)La4Cu8 cuboctahedra, faces with two equivalent Cu(7)La4Cu8 cuboctahedra, faces with four equivalent Cu(3)La2Cu10 cuboctahedra, and faces with four equivalent Cu(4)La4Cu8 cuboctahedra. is represented by the CIF card [CIF]
data_LaCu4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.837
_cell_length_b   8.837
_cell_length_c   11.392
_cell_angle_alpha   112.823
_cell_angle_beta   112.823
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   743.841
_cell_formula_units_Z   9
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
  La  La0  1  0.000  0.000  0.000  1.0
  La  La1  1  0.206  0.206  0.413  1.0
  La  La2  1  0.794  0.794  0.587  1.0
  La  La3  1  0.051  0.551  0.102  1.0
  La  La4  1  0.449  0.949  0.898  1.0
  La  La5  1  0.619  0.374  0.748  1.0
  La  La6  1  0.626  0.381  0.252  1.0
  La  La7  1  0.626  0.870  0.252  1.0
  La  La8  1  0.130  0.374  0.748  1.0
  Cu  Cu9  1  0.246  0.246  0.000  1.0
  Cu  Cu10  1  0.246  0.754  0.000  1.0
  Cu  Cu11  1  0.754  0.246  0.000  1.0
  Cu  Cu12  1  0.754  0.754  0.000  1.0
  Cu  Cu13  1  0.554  0.210  0.420  1.0
  Cu  Cu14  1  0.790  0.446  0.580  1.0
  Cu  Cu15  1  0.790  0.134  0.580  1.0
  Cu  Cu16  1  0.866  0.210  0.420  1.0
  Cu  Cu17  1  0.151  0.794  0.588  1.0
  Cu  Cu18  1  0.206  0.849  0.412  1.0
  Cu  Cu19  1  0.206  0.563  0.412  1.0
  Cu  Cu20  1  0.437  0.794  0.588  1.0
  Cu  Cu21  1  0.926  0.669  0.339  1.0
  Cu  Cu22  1  0.331  0.074  0.661  1.0
  Cu  Cu23  1  0.331  0.588  0.661  1.0
  Cu  Cu24  1  0.412  0.669  0.339  1.0
  Cu  Cu25  1  0.697  0.541  0.082  1.0
  Cu  Cu26  1  0.459  0.303  0.918  1.0
  Cu  Cu27  1  0.459  0.615  0.918  1.0
  Cu  Cu28  1  0.385  0.541  0.082  1.0
  Cu  Cu29  1  0.363  0.081  0.162  1.0
  Cu  Cu30  1  0.919  0.637  0.838  1.0
  Cu  Cu31  1  0.919  0.201  0.838  1.0
  Cu  Cu32  1  0.799  0.081  0.162  1.0
  Cu  Cu33  1  0.006  0.506  0.500  1.0
  Cu  Cu34  1  0.006  0.994  0.500  1.0
  Cu  Cu35  1  0.494  0.506  0.500  1.0
  Cu  Cu36  1  0.494  0.994  0.500  1.0
  Cu  Cu37  1  0.284  0.358  0.243  1.0
  Cu  Cu38  1  0.115  0.716  0.757  1.0
  Cu  Cu39  1  0.642  0.041  0.757  1.0
  Cu  Cu40  1  0.115  0.041  0.757  1.0
  Cu  Cu41  1  0.642  0.716  0.757  1.0
  Cu  Cu42  1  0.959  0.885  0.243  1.0
  Cu  Cu43  1  0.959  0.358  0.243  1.0
  Cu  Cu44  1  0.284  0.885  0.243  1.0
[/CIF]
.