data_BeTlW2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.84
_cell_length_b   3.08
_cell_length_c   7.31
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeTlW2
_chemical_formula_sum   'Be1 Tl1 W2'
_cell_volume   63.84
_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  0.0  1.0
  Tl  Tl1  1  0.0  0.0  0.66  1.0
  W  W2  1  0.42  0.54  0.97  1.0
  W  W3  1  0.42  0.54  0.34  1.0

data_BeTlW2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.84
_cell_length_b   3.08
_cell_length_c   7.31
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeTlW2
_chemical_formula_sum   'Be1 Tl1 W2'
_cell_volume   63.84
_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  0.0  1.0
  Tl  Tl1  1  0.0  0.0  0.66  1.0
  W  W2  1  0.42  0.54  0.34  1.0
  W  W3  1  0.42  0.54  0.97  1.0

Be Tl W W
BeW2Tl crystallizes in the triclinic P1 space group. Be(1) is bonded in a 4-coordinate geometry to two equivalent W(2), four equivalent W(1), and one Tl(1) atom. There is one shorter (3.11 Å) and one longer (3.23 Å) Be(1)-W(2) bond length. There are a spread of Be(1)-W(1) bond distances ranging from 1.86-2.35 Å. The Be(1)-Tl(1) bond length is 2.51 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 4-coordinate geometry to four equivalent Be(1), one W(2), and four equivalent Tl(1) atoms. The W(1)-W(2) bond length is 2.72 Å. There are a spread of W(1)-Tl(1) bond distances ranging from 2.95-3.28 Å. In the second W site, W(2) is bonded in a 11-coordinate geometry to two equivalent Be(1), one W(1), four equivalent W(2), and four equivalent Tl(1) atoms. There are two shorter (2.84 Å) and two longer (3.08 Å) W(2)-W(2) bond lengths. There are a spread of W(2)-Tl(1) bond distances ranging from 2.95-3.28 Å. Tl(1) is bonded in a 13-coordinate geometry to one Be(1), four equivalent W(1), four equivalent W(2), and four equivalent Tl(1) atoms. There are two shorter (2.84 Å) and two longer (3.08 Å) Tl(1)-Tl(1) bond lengths.