data_BeOsW2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.13
_cell_length_b   3.13
_cell_length_c   5.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeOsW2
_chemical_formula_sum   'Be1 Os1 W2'
_cell_volume   56.37
_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
  Be  Be0  1  0.0  0.0  0.94  1.0
  Os  Os1  1  0.56  0.56  0.14  1.0
  W  W2  1  0.0  0.0  0.03  1.0
  W  W3  1  0.56  0.56  0.54  1.0

data_BeOsW2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.42
_cell_length_b   4.42
_cell_length_c   5.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeOsW2
_chemical_formula_sum   'Be2 Os2 W4'
_cell_volume   112.73
_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
  Be  Be0  2  0.0  0.0  0.94  1.0
  Os  Os1  2  0.06  0.5  0.14  1.0
  W  W2  2  0.0  0.0  0.03  1.0
  W  W3  2  0.06  0.5  0.54  1.0

Be Os W W
BeW2Os crystallizes in the monoclinic Cm space group. Be(1) is bonded in a single-bond geometry to one W(1) and one W(2) atom. The Be(1)-W(1) bond length is 0.49 Å. The Be(1)-W(2) bond length is 2.98 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a single-bond geometry to one Be(1) and four equivalent Os(1) atoms. There are a spread of W(1)-Os(1) bond distances ranging from 2.04-2.57 Å. In the second W site, W(2) is bonded in a 2-coordinate geometry to one Be(1) and one Os(1) atom. The W(2)-Os(1) bond length is 2.35 Å. Os(1) is bonded in a 5-coordinate geometry to one W(2) and four equivalent W(1) atoms.