The material described by Cu9Ga4 is gamma-brass-like structured and crystallizes in the cubic P-43m space group. There are six inequivalent Cu sites. In the first Cu site, Cu(5) is bonded in a 13-coordinate geometry to one Cu(5), two equivalent Cu(2), two equivalent Cu(3), four equivalent Cu(6), and four equivalent Ga(2) atoms. In the second Cu site, Cu(6) is bonded in a 11-coordinate geometry to one Cu(1), one Cu(3), two equivalent Cu(4), two equivalent Cu(5), one Ga(1), and four equivalent Ga(2) atoms. In the third Cu site, Cu(1) is bonded in a 12-coordinate geometry to three equivalent Cu(4), three equivalent Cu(6), three equivalent Ga(1), and three equivalent Ga(2) atoms. In the fourth Cu site, Cu(2) is bonded in a 12-coordinate geometry to three equivalent Cu(2), three equivalent Cu(3), three equivalent Cu(5), and three equivalent Ga(2) atoms. In the fifth Cu site, Cu(3) is bonded in a 3-coordinate geometry to three equivalent Cu(2), three equivalent Cu(5), three equivalent Cu(6), and three equivalent Ga(2) atoms. In the sixth Cu site, Cu(4) is bonded in a 13-coordinate geometry to one Cu(4), two equivalent Cu(1), four equivalent Cu(6), two equivalent Ga(1), and four equivalent Ga(2) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Cu(1), three equivalent Cu(4), and three equivalent Cu(6) atoms. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), two equivalent Cu(4), two equivalent Cu(5), and four equivalent Cu(6) atoms. is represented by the CIF file [CIF]
data_Ga4Cu9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.649
_cell_length_b   8.649
_cell_length_c   8.649
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   647.045
_cell_formula_units_Z   4
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
  Ga  Ga0  1  0.877  0.877  0.123  1.0
  Ga  Ga1  1  0.877  0.123  0.877  1.0
  Ga  Ga2  1  0.123  0.877  0.877  1.0
  Ga  Ga3  1  0.123  0.123  0.123  1.0
  Ga  Ga4  1  0.467  0.191  0.809  1.0
  Ga  Ga5  1  0.191  0.191  0.533  1.0
  Ga  Ga6  1  0.191  0.467  0.809  1.0
  Ga  Ga7  1  0.467  0.809  0.191  1.0
  Ga  Ga8  1  0.191  0.809  0.467  1.0
  Ga  Ga9  1  0.191  0.533  0.191  1.0
  Ga  Ga10  1  0.533  0.191  0.191  1.0
  Ga  Ga11  1  0.809  0.191  0.467  1.0
  Ga  Ga12  1  0.809  0.467  0.191  1.0
  Ga  Ga13  1  0.533  0.809  0.809  1.0
  Ga  Ga14  1  0.809  0.809  0.533  1.0
  Ga  Ga15  1  0.809  0.533  0.809  1.0
  Cu  Cu16  1  0.171  0.171  0.829  1.0
  Cu  Cu17  1  0.171  0.829  0.171  1.0
  Cu  Cu18  1  0.829  0.171  0.171  1.0
  Cu  Cu19  1  0.829  0.829  0.829  1.0
  Cu  Cu20  1  0.395  0.395  0.605  1.0
  Cu  Cu21  1  0.395  0.605  0.395  1.0
  Cu  Cu22  1  0.605  0.395  0.395  1.0
  Cu  Cu23  1  0.605  0.605  0.605  1.0
  Cu  Cu24  1  0.673  0.673  0.327  1.0
  Cu  Cu25  1  0.673  0.327  0.673  1.0
  Cu  Cu26  1  0.327  0.673  0.673  1.0
  Cu  Cu27  1  0.327  0.327  0.327  1.0
  Cu  Cu28  1  0.000  0.000  0.355  1.0
  Cu  Cu29  1  0.000  0.645  0.000  1.0
  Cu  Cu30  1  0.645  0.000  0.000  1.0
  Cu  Cu31  1  0.000  0.000  0.645  1.0
  Cu  Cu32  1  0.000  0.355  0.000  1.0
  Cu  Cu33  1  0.355  0.000  0.000  1.0
  Cu  Cu34  1  0.500  0.500  0.855  1.0
  Cu  Cu35  1  0.500  0.145  0.500  1.0
  Cu  Cu36  1  0.145  0.500  0.500  1.0
  Cu  Cu37  1  0.500  0.500  0.145  1.0
  Cu  Cu38  1  0.500  0.855  0.500  1.0
  Cu  Cu39  1  0.855  0.500  0.500  1.0
  Cu  Cu40  1  0.971  0.683  0.317  1.0
  Cu  Cu41  1  0.683  0.683  0.029  1.0
  Cu  Cu42  1  0.683  0.971  0.317  1.0
  Cu  Cu43  1  0.971  0.317  0.683  1.0
  Cu  Cu44  1  0.683  0.317  0.971  1.0
  Cu  Cu45  1  0.683  0.029  0.683  1.0
  Cu  Cu46  1  0.029  0.683  0.683  1.0
  Cu  Cu47  1  0.317  0.683  0.971  1.0
  Cu  Cu48  1  0.317  0.971  0.683  1.0
  Cu  Cu49  1  0.029  0.317  0.317  1.0
  Cu  Cu50  1  0.317  0.317  0.029  1.0
  Cu  Cu51  1  0.317  0.029  0.317  1.0
[/CIF]
.
The material described by Cu9Ga4 is gamma-brass-like structured and crystallizes in the cubic P-43m space group. There are six inequivalent Cu sites. In the first Cu site, Cu(5) is bonded in a 13-coordinate geometry to one Cu(5), two equivalent Cu(2), two equivalent Cu(3), four equivalent Cu(6), and four equivalent Ga(2) atoms. In the second Cu site, Cu(6) is bonded in a 11-coordinate geometry to one Cu(1), one Cu(3), two equivalent Cu(4), two equivalent Cu(5), one Ga(1), and four equivalent Ga(2) atoms. In the third Cu site, Cu(1) is bonded in a 12-coordinate geometry to three equivalent Cu(4), three equivalent Cu(6), three equivalent Ga(1), and three equivalent Ga(2) atoms. In the fourth Cu site, Cu(2) is bonded in a 12-coordinate geometry to three equivalent Cu(2), three equivalent Cu(3), three equivalent Cu(5), and three equivalent Ga(2) atoms. In the fifth Cu site, Cu(3) is bonded in a 3-coordinate geometry to three equivalent Cu(2), three equivalent Cu(5), three equivalent Cu(6), and three equivalent Ga(2) atoms. In the sixth Cu site, Cu(4) is bonded in a 13-coordinate geometry to one Cu(4), two equivalent Cu(1), four equivalent Cu(6), two equivalent Ga(1), and four equivalent Ga(2) atoms. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to three equivalent Cu(1), three equivalent Cu(4), and three equivalent Cu(6) atoms. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to one Cu(1), one Cu(2), one Cu(3), two equivalent Cu(4), two equivalent Cu(5), and four equivalent Cu(6) atoms. is represented by the CIF file [CIF]
data_Ga4Cu9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.649
_cell_length_b   8.649
_cell_length_c   8.649
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   647.045
_cell_formula_units_Z   4
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
  Ga  Ga0  1  0.877  0.877  0.123  1.0
  Ga  Ga1  1  0.877  0.123  0.877  1.0
  Ga  Ga2  1  0.123  0.877  0.877  1.0
  Ga  Ga3  1  0.123  0.123  0.123  1.0
  Ga  Ga4  1  0.467  0.191  0.809  1.0
  Ga  Ga5  1  0.191  0.191  0.533  1.0
  Ga  Ga6  1  0.191  0.467  0.809  1.0
  Ga  Ga7  1  0.467  0.809  0.191  1.0
  Ga  Ga8  1  0.191  0.809  0.467  1.0
  Ga  Ga9  1  0.191  0.533  0.191  1.0
  Ga  Ga10  1  0.533  0.191  0.191  1.0
  Ga  Ga11  1  0.809  0.191  0.467  1.0
  Ga  Ga12  1  0.809  0.467  0.191  1.0
  Ga  Ga13  1  0.533  0.809  0.809  1.0
  Ga  Ga14  1  0.809  0.809  0.533  1.0
  Ga  Ga15  1  0.809  0.533  0.809  1.0
  Cu  Cu16  1  0.171  0.171  0.829  1.0
  Cu  Cu17  1  0.171  0.829  0.171  1.0
  Cu  Cu18  1  0.829  0.171  0.171  1.0
  Cu  Cu19  1  0.829  0.829  0.829  1.0
  Cu  Cu20  1  0.395  0.395  0.605  1.0
  Cu  Cu21  1  0.395  0.605  0.395  1.0
  Cu  Cu22  1  0.605  0.395  0.395  1.0
  Cu  Cu23  1  0.605  0.605  0.605  1.0
  Cu  Cu24  1  0.673  0.673  0.327  1.0
  Cu  Cu25  1  0.673  0.327  0.673  1.0
  Cu  Cu26  1  0.327  0.673  0.673  1.0
  Cu  Cu27  1  0.327  0.327  0.327  1.0
  Cu  Cu28  1  0.000  0.000  0.355  1.0
  Cu  Cu29  1  0.000  0.645  0.000  1.0
  Cu  Cu30  1  0.645  0.000  0.000  1.0
  Cu  Cu31  1  0.000  0.000  0.645  1.0
  Cu  Cu32  1  0.000  0.355  0.000  1.0
  Cu  Cu33  1  0.355  0.000  0.000  1.0
  Cu  Cu34  1  0.500  0.500  0.855  1.0
  Cu  Cu35  1  0.500  0.145  0.500  1.0
  Cu  Cu36  1  0.145  0.500  0.500  1.0
  Cu  Cu37  1  0.500  0.500  0.145  1.0
  Cu  Cu38  1  0.500  0.855  0.500  1.0
  Cu  Cu39  1  0.855  0.500  0.500  1.0
  Cu  Cu40  1  0.971  0.683  0.317  1.0
  Cu  Cu41  1  0.683  0.683  0.029  1.0
  Cu  Cu42  1  0.683  0.971  0.317  1.0
  Cu  Cu43  1  0.971  0.317  0.683  1.0
  Cu  Cu44  1  0.683  0.317  0.971  1.0
  Cu  Cu45  1  0.683  0.029  0.683  1.0
  Cu  Cu46  1  0.029  0.683  0.683  1.0
  Cu  Cu47  1  0.317  0.683  0.971  1.0
  Cu  Cu48  1  0.317  0.971  0.683  1.0
  Cu  Cu49  1  0.029  0.317  0.317  1.0
  Cu  Cu50  1  0.317  0.317  0.029  1.0
  Cu  Cu51  1  0.317  0.029  0.317  1.0
[/CIF]
.