The structure described by Be15Ta6Cu8 crystallizes in the cubic Fm-3m space group. There are three inequivalent Be sites. In the first Be site, Be(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms. In the second Be site, Be(2) is bonded to four equivalent Be(3), four equivalent Ta(1), and four equivalent Cu(1) atoms to form distorted BeTa4Be4Cu4 cuboctahedra that share corners with four equivalent Be(2)Ta4Be4Cu4 cuboctahedra, corners with eight equivalent Be(3)Ta3Be6Cu3 cuboctahedra, faces with eight equivalent Be(3)Ta3Be6Cu3 cuboctahedra, and faces with eight equivalent Be(2)Ta4Be4Cu4 cuboctahedra. In the third Be site, Be(3) is bonded to three equivalent Be(2), three equivalent Be(3), three equivalent Ta(1), and three equivalent Cu(1) atoms to form distorted BeTa3Be6Cu3 cuboctahedra that share corners with six equivalent Be(3)Ta3Be6Cu3 cuboctahedra, corners with six equivalent Be(2)Ta4Be4Cu4 cuboctahedra, faces with six equivalent Be(3)Ta3Be6Cu3 cuboctahedra, and faces with six equivalent Be(2)Ta4Be4Cu4 cuboctahedra. Ta(1) is bonded in a 16-coordinate geometry to four equivalent Be(2), four equivalent Be(3), four equivalent Ta(1), and four equivalent Cu(1) atoms. Cu(1) is bonded in a 13-coordinate geometry to one Be(1), three equivalent Be(2), three equivalent Be(3), three equivalent Ta(1), and three equivalent Cu(1) atoms. is represented by the CIF file [CIF]
data_Ta6Be15Cu8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.616
_cell_length_b   7.616
_cell_length_c   7.616
_cell_angle_alpha   60.004
_cell_angle_beta   60.004
_cell_angle_gamma   60.004
_symmetry_Int_Tables_number   1
_cell_volume   312.347
_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
  Ta  Ta0  1  0.192  0.192  0.808  1.0
  Ta  Ta1  1  0.192  0.808  0.808  1.0
  Ta  Ta2  1  0.808  0.192  0.192  1.0
  Ta  Ta3  1  0.192  0.808  0.192  1.0
  Ta  Ta4  1  0.808  0.192  0.808  1.0
  Ta  Ta5  1  0.808  0.808  0.192  1.0
  Be  Be6  1  0.500  0.500  0.500  1.0
  Be  Be7  1  0.500  0.500  0.000  1.0
  Be  Be8  1  0.000  0.500  0.500  1.0
  Be  Be9  1  0.500  1.000  0.000  1.0
  Be  Be10  1  1.000  1.000  0.500  1.0
  Be  Be11  1  1.000  0.500  0.000  1.0
  Be  Be12  1  0.500  0.000  0.500  1.0
  Be  Be13  1  0.827  0.520  0.827  1.0
  Be  Be14  1  0.173  0.173  0.480  1.0
  Be  Be15  1  0.480  0.173  0.173  1.0
  Be  Be16  1  0.173  0.173  0.173  1.0
  Be  Be17  1  0.520  0.827  0.827  1.0
  Be  Be18  1  0.827  0.827  0.827  1.0
  Be  Be19  1  0.827  0.827  0.520  1.0
  Be  Be20  1  0.173  0.480  0.173  1.0
  Cu  Cu21  1  0.623  0.132  0.623  1.0
  Cu  Cu22  1  0.377  0.377  0.868  1.0
  Cu  Cu23  1  0.868  0.377  0.377  1.0
  Cu  Cu24  1  0.377  0.377  0.377  1.0
  Cu  Cu25  1  0.132  0.623  0.623  1.0
  Cu  Cu26  1  0.623  0.623  0.623  1.0
  Cu  Cu27  1  0.623  0.623  0.132  1.0
  Cu  Cu28  1  0.377  0.868  0.377  1.0
[/CIF]
.
The structure described by Be15Ta6Cu8 crystallizes in the cubic Fm-3m space group. There are three inequivalent Be sites. In the first Be site, Be(1) is bonded in a body-centered cubic geometry to eight equivalent Cu(1) atoms. In the second Be site, Be(2) is bonded to four equivalent Be(3), four equivalent Ta(1), and four equivalent Cu(1) atoms to form distorted BeTa4Be4Cu4 cuboctahedra that share corners with four equivalent Be(2)Ta4Be4Cu4 cuboctahedra, corners with eight equivalent Be(3)Ta3Be6Cu3 cuboctahedra, faces with eight equivalent Be(3)Ta3Be6Cu3 cuboctahedra, and faces with eight equivalent Be(2)Ta4Be4Cu4 cuboctahedra. In the third Be site, Be(3) is bonded to three equivalent Be(2), three equivalent Be(3), three equivalent Ta(1), and three equivalent Cu(1) atoms to form distorted BeTa3Be6Cu3 cuboctahedra that share corners with six equivalent Be(3)Ta3Be6Cu3 cuboctahedra, corners with six equivalent Be(2)Ta4Be4Cu4 cuboctahedra, faces with six equivalent Be(3)Ta3Be6Cu3 cuboctahedra, and faces with six equivalent Be(2)Ta4Be4Cu4 cuboctahedra. Ta(1) is bonded in a 16-coordinate geometry to four equivalent Be(2), four equivalent Be(3), four equivalent Ta(1), and four equivalent Cu(1) atoms. Cu(1) is bonded in a 13-coordinate geometry to one Be(1), three equivalent Be(2), three equivalent Be(3), three equivalent Ta(1), and three equivalent Cu(1) atoms. is represented by the CIF file [CIF]
data_Ta6Be15Cu8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.616
_cell_length_b   7.616
_cell_length_c   7.616
_cell_angle_alpha   60.004
_cell_angle_beta   60.004
_cell_angle_gamma   60.004
_symmetry_Int_Tables_number   1
_cell_volume   312.347
_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
  Ta  Ta0  1  0.192  0.192  0.808  1.0
  Ta  Ta1  1  0.192  0.808  0.808  1.0
  Ta  Ta2  1  0.808  0.192  0.192  1.0
  Ta  Ta3  1  0.192  0.808  0.192  1.0
  Ta  Ta4  1  0.808  0.192  0.808  1.0
  Ta  Ta5  1  0.808  0.808  0.192  1.0
  Be  Be6  1  0.500  0.500  0.500  1.0
  Be  Be7  1  0.500  0.500  0.000  1.0
  Be  Be8  1  0.000  0.500  0.500  1.0
  Be  Be9  1  0.500  1.000  0.000  1.0
  Be  Be10  1  1.000  1.000  0.500  1.0
  Be  Be11  1  1.000  0.500  0.000  1.0
  Be  Be12  1  0.500  0.000  0.500  1.0
  Be  Be13  1  0.827  0.520  0.827  1.0
  Be  Be14  1  0.173  0.173  0.480  1.0
  Be  Be15  1  0.480  0.173  0.173  1.0
  Be  Be16  1  0.173  0.173  0.173  1.0
  Be  Be17  1  0.520  0.827  0.827  1.0
  Be  Be18  1  0.827  0.827  0.827  1.0
  Be  Be19  1  0.827  0.827  0.520  1.0
  Be  Be20  1  0.173  0.480  0.173  1.0
  Cu  Cu21  1  0.623  0.132  0.623  1.0
  Cu  Cu22  1  0.377  0.377  0.868  1.0
  Cu  Cu23  1  0.868  0.377  0.377  1.0
  Cu  Cu24  1  0.377  0.377  0.377  1.0
  Cu  Cu25  1  0.132  0.623  0.623  1.0
  Cu  Cu26  1  0.623  0.623  0.623  1.0
  Cu  Cu27  1  0.623  0.623  0.132  1.0
  Cu  Cu28  1  0.377  0.868  0.377  1.0
[/CIF]
.