The material structure described by Be13Eu crystallizes in the cubic Fm-3c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to twelve equivalent Be(2) atoms to form a mixture of face and corner-sharing BeBe12 cuboctahedra. In the second Be site, Be(2) is bonded to one Be(1), nine equivalent Be(2), and two equivalent Eu(1) atoms to form distorted BeEu2Be10 cuboctahedra that share  a cornercorner with one Be(1)Be12 cuboctahedra, corners with twenty-seven equivalent Be(2)Eu2Be10 cuboctahedra, edges with eight equivalent Be(2)Eu2Be10 cuboctahedra, faces with two equivalent Be(1)Be12 cuboctahedra, and faces with twenty-three equivalent Be(2)Eu2Be10 cuboctahedra. Eu(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuBe13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.293
_cell_length_b   7.293
_cell_length_c   7.293
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   274.236
_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
  Eu  Eu0  1  0.750  0.750  0.750  1.0
  Eu  Eu1  1  0.250  0.250  0.250  1.0
  Be  Be2  1  0.500  0.500  0.500  1.0
  Be  Be3  1  0.000  0.000  0.000  1.0
  Be  Be4  1  0.789  0.437  0.211  1.0
  Be  Be5  1  0.211  0.563  0.789  1.0
  Be  Be6  1  0.563  0.211  0.437  1.0
  Be  Be7  1  0.437  0.789  0.563  1.0
  Be  Be8  1  0.289  0.063  0.711  1.0
  Be  Be9  1  0.711  0.937  0.289  1.0
  Be  Be10  1  0.937  0.711  0.063  1.0
  Be  Be11  1  0.063  0.289  0.937  1.0
  Be  Be12  1  0.437  0.211  0.789  1.0
  Be  Be13  1  0.563  0.789  0.211  1.0
  Be  Be14  1  0.211  0.437  0.563  1.0
  Be  Be15  1  0.789  0.563  0.437  1.0
  Be  Be16  1  0.063  0.711  0.289  1.0
  Be  Be17  1  0.937  0.289  0.711  1.0
  Be  Be18  1  0.711  0.063  0.937  1.0
  Be  Be19  1  0.289  0.937  0.063  1.0
  Be  Be20  1  0.211  0.789  0.437  1.0
  Be  Be21  1  0.789  0.211  0.563  1.0
  Be  Be22  1  0.437  0.563  0.211  1.0
  Be  Be23  1  0.563  0.437  0.789  1.0
  Be  Be24  1  0.711  0.289  0.063  1.0
  Be  Be25  1  0.289  0.711  0.937  1.0
  Be  Be26  1  0.063  0.937  0.711  1.0
  Be  Be27  1  0.937  0.063  0.289  1.0
[/CIF]
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The material structure described by Be13Eu crystallizes in the cubic Fm-3c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to twelve equivalent Be(2) atoms to form a mixture of face and corner-sharing BeBe12 cuboctahedra. In the second Be site, Be(2) is bonded to one Be(1), nine equivalent Be(2), and two equivalent Eu(1) atoms to form distorted BeEu2Be10 cuboctahedra that share  a cornercorner with one Be(1)Be12 cuboctahedra, corners with twenty-seven equivalent Be(2)Eu2Be10 cuboctahedra, edges with eight equivalent Be(2)Eu2Be10 cuboctahedra, faces with two equivalent Be(1)Be12 cuboctahedra, and faces with twenty-three equivalent Be(2)Eu2Be10 cuboctahedra. Eu(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuBe13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.293
_cell_length_b   7.293
_cell_length_c   7.293
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   274.236
_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
  Eu  Eu0  1  0.750  0.750  0.750  1.0
  Eu  Eu1  1  0.250  0.250  0.250  1.0
  Be  Be2  1  0.500  0.500  0.500  1.0
  Be  Be3  1  0.000  0.000  0.000  1.0
  Be  Be4  1  0.789  0.437  0.211  1.0
  Be  Be5  1  0.211  0.563  0.789  1.0
  Be  Be6  1  0.563  0.211  0.437  1.0
  Be  Be7  1  0.437  0.789  0.563  1.0
  Be  Be8  1  0.289  0.063  0.711  1.0
  Be  Be9  1  0.711  0.937  0.289  1.0
  Be  Be10  1  0.937  0.711  0.063  1.0
  Be  Be11  1  0.063  0.289  0.937  1.0
  Be  Be12  1  0.437  0.211  0.789  1.0
  Be  Be13  1  0.563  0.789  0.211  1.0
  Be  Be14  1  0.211  0.437  0.563  1.0
  Be  Be15  1  0.789  0.563  0.437  1.0
  Be  Be16  1  0.063  0.711  0.289  1.0
  Be  Be17  1  0.937  0.289  0.711  1.0
  Be  Be18  1  0.711  0.063  0.937  1.0
  Be  Be19  1  0.289  0.937  0.063  1.0
  Be  Be20  1  0.211  0.789  0.437  1.0
  Be  Be21  1  0.789  0.211  0.563  1.0
  Be  Be22  1  0.437  0.563  0.211  1.0
  Be  Be23  1  0.563  0.437  0.789  1.0
  Be  Be24  1  0.711  0.289  0.063  1.0
  Be  Be25  1  0.289  0.711  0.937  1.0
  Be  Be26  1  0.063  0.937  0.711  1.0
  Be  Be27  1  0.937  0.063  0.289  1.0
[/CIF]
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