data_U3Be
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.67
_cell_length_b   4.67
_cell_length_c   4.67
_cell_angle_alpha   123.27
_cell_angle_beta   123.27
_cell_angle_gamma   84.43
_symmetry_Int_Tables_number   1
_chemical_formula_structural   U3Be
_chemical_formula_sum   'U3 Be1'
_cell_volume   68.32
_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
  U  U1  1  0.0  0.0  0.46  1.0
  U  U2  1  0.0  0.22  0.73  1.0
  U  U3  1  0.22  0.0  0.73  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0

data_U3Be
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.28
_cell_length_b   6.28
_cell_length_c   4.67
_cell_angle_alpha   90.0
_cell_angle_beta   132.21
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   U3Be
_chemical_formula_sum   'U6 Be2'
_cell_volume   136.64
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  U  U0  4  0.39  0.39  0.51  1.0
  U  U1  2  0.0  0.0  0.46  1.0
  Be  Be2  2  0.0  0.0  0.0  1.0

U U U Be
BeU3 crystallizes in the monoclinic Cm space group. Be(1) is bonded in a 5-coordinate geometry to one U(1) and four equivalent U(2) atoms. The Be(1)-U(1) bond length is 2.16 Å. There are two shorter (2.02 Å) and two longer (3.13 Å) Be(1)-U(2) bond lengths. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 3-coordinate geometry to one Be(1) and two equivalent U(2) atoms. Both U(1)-U(2) bond lengths are 1.11 Å. In the second U site, U(2) is bonded in a 4-coordinate geometry to two equivalent Be(1), one U(1), and one U(2) atom. The U(2)-U(2) bond length is 1.39 Å.