The crystal structure described by Be13Sb crystallizes in the cubic Fm-3c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one Be(2), nine equivalent Be(1), and two equivalent Sb(1) atoms to form distorted BeBe10Sb2 cuboctahedra that share  a cornercorner with one Be(2)Be12 cuboctahedra, corners with twenty-seven equivalent Be(1)Be10Sb2 cuboctahedra, edges with eight equivalent Be(1)Be10Sb2 cuboctahedra, faces with two equivalent Be(2)Be12 cuboctahedra, and faces with twenty-three equivalent Be(1)Be10Sb2 cuboctahedra. In the second Be site, Be(2) is bonded to twelve equivalent Be(1) atoms to form a mixture of corner and face-sharing BeBe12 cuboctahedra. Sb(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Be13Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.266
_cell_length_b   7.266
_cell_length_c   7.266
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   271.280
_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
  Be  Be0  1  0.713  0.933  0.287  1.0
  Be  Be1  1  0.933  0.713  0.067  1.0
  Be  Be2  1  0.000  0.000  0.000  1.0
  Be  Be3  1  0.500  0.500  0.500  1.0
  Be  Be4  1  0.067  0.287  0.933  1.0
  Be  Be5  1  0.787  0.567  0.433  1.0
  Be  Be6  1  0.567  0.787  0.213  1.0
  Be  Be7  1  0.213  0.567  0.787  1.0
  Be  Be8  1  0.787  0.433  0.213  1.0
  Be  Be9  1  0.567  0.433  0.787  1.0
  Be  Be10  1  0.213  0.787  0.433  1.0
  Be  Be11  1  0.933  0.067  0.287  1.0
  Be  Be12  1  0.287  0.933  0.067  1.0
  Be  Be13  1  0.067  0.713  0.287  1.0
  Be  Be14  1  0.067  0.933  0.713  1.0
  Be  Be15  1  0.287  0.713  0.933  1.0
  Be  Be16  1  0.713  0.067  0.933  1.0
  Be  Be17  1  0.713  0.287  0.067  1.0
  Be  Be18  1  0.933  0.287  0.713  1.0
  Be  Be19  1  0.433  0.787  0.567  1.0
  Be  Be20  1  0.433  0.213  0.787  1.0
  Be  Be21  1  0.787  0.213  0.567  1.0
  Be  Be22  1  0.433  0.567  0.213  1.0
  Be  Be23  1  0.213  0.433  0.567  1.0
  Be  Be24  1  0.567  0.213  0.433  1.0
  Be  Be25  1  0.287  0.067  0.713  1.0
  Sb  Sb26  1  0.750  0.750  0.750  1.0
  Sb  Sb27  1  0.250  0.250  0.250  1.0
[/CIF]
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The crystal structure described by Be13Sb crystallizes in the cubic Fm-3c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one Be(2), nine equivalent Be(1), and two equivalent Sb(1) atoms to form distorted BeBe10Sb2 cuboctahedra that share  a cornercorner with one Be(2)Be12 cuboctahedra, corners with twenty-seven equivalent Be(1)Be10Sb2 cuboctahedra, edges with eight equivalent Be(1)Be10Sb2 cuboctahedra, faces with two equivalent Be(2)Be12 cuboctahedra, and faces with twenty-three equivalent Be(1)Be10Sb2 cuboctahedra. In the second Be site, Be(2) is bonded to twelve equivalent Be(1) atoms to form a mixture of corner and face-sharing BeBe12 cuboctahedra. Sb(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Be13Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.266
_cell_length_b   7.266
_cell_length_c   7.266
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   271.280
_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
  Be  Be0  1  0.713  0.933  0.287  1.0
  Be  Be1  1  0.933  0.713  0.067  1.0
  Be  Be2  1  0.000  0.000  0.000  1.0
  Be  Be3  1  0.500  0.500  0.500  1.0
  Be  Be4  1  0.067  0.287  0.933  1.0
  Be  Be5  1  0.787  0.567  0.433  1.0
  Be  Be6  1  0.567  0.787  0.213  1.0
  Be  Be7  1  0.213  0.567  0.787  1.0
  Be  Be8  1  0.787  0.433  0.213  1.0
  Be  Be9  1  0.567  0.433  0.787  1.0
  Be  Be10  1  0.213  0.787  0.433  1.0
  Be  Be11  1  0.933  0.067  0.287  1.0
  Be  Be12  1  0.287  0.933  0.067  1.0
  Be  Be13  1  0.067  0.713  0.287  1.0
  Be  Be14  1  0.067  0.933  0.713  1.0
  Be  Be15  1  0.287  0.713  0.933  1.0
  Be  Be16  1  0.713  0.067  0.933  1.0
  Be  Be17  1  0.713  0.287  0.067  1.0
  Be  Be18  1  0.933  0.287  0.713  1.0
  Be  Be19  1  0.433  0.787  0.567  1.0
  Be  Be20  1  0.433  0.213  0.787  1.0
  Be  Be21  1  0.787  0.213  0.567  1.0
  Be  Be22  1  0.433  0.567  0.213  1.0
  Be  Be23  1  0.213  0.433  0.567  1.0
  Be  Be24  1  0.567  0.213  0.433  1.0
  Be  Be25  1  0.287  0.067  0.713  1.0
  Sb  Sb26  1  0.750  0.750  0.750  1.0
  Sb  Sb27  1  0.250  0.250  0.250  1.0
[/CIF]
.