The structure described by Be13Pa crystallizes in the cubic Fm-3c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a cuboctahedral geometry to twelve equivalent Be(2) atoms. In the second Be site, Be(2) is bonded in a 12-coordinate geometry to one Be(1), nine equivalent Be(2), and two equivalent Pa(1) atoms. Pa(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(2) atoms. is represented by the CIF card [CIF]
data_PaBe13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.224
_cell_length_b   7.224
_cell_length_c   7.224
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   266.584
_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
  Pa  Pa0  1  0.750  0.750  0.750  1.0
  Pa  Pa1  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  0.791  0.439  0.209  1.0
  Be  Be5  1  0.209  0.561  0.791  1.0
  Be  Be6  1  0.561  0.209  0.439  1.0
  Be  Be7  1  0.439  0.791  0.561  1.0
  Be  Be8  1  0.291  0.061  0.709  1.0
  Be  Be9  1  0.709  0.939  0.291  1.0
  Be  Be10  1  0.939  0.709  0.061  1.0
  Be  Be11  1  0.061  0.291  0.939  1.0
  Be  Be12  1  0.439  0.209  0.791  1.0
  Be  Be13  1  0.561  0.791  0.209  1.0
  Be  Be14  1  0.209  0.439  0.561  1.0
  Be  Be15  1  0.791  0.561  0.439  1.0
  Be  Be16  1  0.061  0.709  0.291  1.0
  Be  Be17  1  0.939  0.291  0.709  1.0
  Be  Be18  1  0.709  0.061  0.939  1.0
  Be  Be19  1  0.291  0.939  0.061  1.0
  Be  Be20  1  0.209  0.791  0.439  1.0
  Be  Be21  1  0.791  0.209  0.561  1.0
  Be  Be22  1  0.439  0.561  0.209  1.0
  Be  Be23  1  0.561  0.439  0.791  1.0
  Be  Be24  1  0.709  0.291  0.061  1.0
  Be  Be25  1  0.291  0.709  0.939  1.0
  Be  Be26  1  0.061  0.939  0.709  1.0
  Be  Be27  1  0.939  0.061  0.291  1.0
[/CIF]
.
The structure described by Be13Pa crystallizes in the cubic Fm-3c space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a cuboctahedral geometry to twelve equivalent Be(2) atoms. In the second Be site, Be(2) is bonded in a 12-coordinate geometry to one Be(1), nine equivalent Be(2), and two equivalent Pa(1) atoms. Pa(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Be(2) atoms. is represented by the CIF card [CIF]
data_PaBe13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.224
_cell_length_b   7.224
_cell_length_c   7.224
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   266.584
_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
  Pa  Pa0  1  0.750  0.750  0.750  1.0
  Pa  Pa1  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  0.791  0.439  0.209  1.0
  Be  Be5  1  0.209  0.561  0.791  1.0
  Be  Be6  1  0.561  0.209  0.439  1.0
  Be  Be7  1  0.439  0.791  0.561  1.0
  Be  Be8  1  0.291  0.061  0.709  1.0
  Be  Be9  1  0.709  0.939  0.291  1.0
  Be  Be10  1  0.939  0.709  0.061  1.0
  Be  Be11  1  0.061  0.291  0.939  1.0
  Be  Be12  1  0.439  0.209  0.791  1.0
  Be  Be13  1  0.561  0.791  0.209  1.0
  Be  Be14  1  0.209  0.439  0.561  1.0
  Be  Be15  1  0.791  0.561  0.439  1.0
  Be  Be16  1  0.061  0.709  0.291  1.0
  Be  Be17  1  0.939  0.291  0.709  1.0
  Be  Be18  1  0.709  0.061  0.939  1.0
  Be  Be19  1  0.291  0.939  0.061  1.0
  Be  Be20  1  0.209  0.791  0.439  1.0
  Be  Be21  1  0.791  0.209  0.561  1.0
  Be  Be22  1  0.439  0.561  0.209  1.0
  Be  Be23  1  0.561  0.439  0.791  1.0
  Be  Be24  1  0.709  0.291  0.061  1.0
  Be  Be25  1  0.291  0.709  0.939  1.0
  Be  Be26  1  0.061  0.939  0.709  1.0
  Be  Be27  1  0.939  0.061  0.291  1.0
[/CIF]
.