The crystal structure described by Be2Ta3 crystallizes in the tetragonal P4/mbm space group. Be(1) is bonded in a 9-coordinate geometry to one Be(1), two equivalent Ta(1), and six equivalent Ta(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted square co-planar geometry to four equivalent Be(1) atoms. In the second Ta site, Ta(2) is bonded in a 6-coordinate geometry to six equivalent Be(1) atoms. is represented by the CIF file [CIF]
data_Ta3Be2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.329
_cell_length_b   6.511
_cell_length_c   6.511
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   141.120
_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
  Ta  Ta0  1  0.000  0.500  0.500  1.0
  Ta  Ta1  1  0.000  0.000  0.000  1.0
  Ta  Ta2  1  0.500  0.179  0.679  1.0
  Ta  Ta3  1  0.500  0.821  0.321  1.0
  Ta  Ta4  1  0.500  0.321  0.179  1.0
  Ta  Ta5  1  0.500  0.679  0.821  1.0
  Be  Be6  1  0.000  0.613  0.113  1.0
  Be  Be7  1  0.000  0.387  0.887  1.0
  Be  Be8  1  0.000  0.887  0.613  1.0
  Be  Be9  1  0.000  0.113  0.387  1.0
[/CIF]
.
The crystal structure described by Be2Ta3 crystallizes in the tetragonal P4/mbm space group. Be(1) is bonded in a 9-coordinate geometry to one Be(1), two equivalent Ta(1), and six equivalent Ta(2) atoms. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted square co-planar geometry to four equivalent Be(1) atoms. In the second Ta site, Ta(2) is bonded in a 6-coordinate geometry to six equivalent Be(1) atoms. is represented by the CIF file [CIF]
data_Ta3Be2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.329
_cell_length_b   6.511
_cell_length_c   6.511
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   141.120
_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
  Ta  Ta0  1  0.000  0.500  0.500  1.0
  Ta  Ta1  1  0.000  0.000  0.000  1.0
  Ta  Ta2  1  0.500  0.179  0.679  1.0
  Ta  Ta3  1  0.500  0.821  0.321  1.0
  Ta  Ta4  1  0.500  0.321  0.179  1.0
  Ta  Ta5  1  0.500  0.679  0.821  1.0
  Be  Be6  1  0.000  0.613  0.113  1.0
  Be  Be7  1  0.000  0.387  0.887  1.0
  Be  Be8  1  0.000  0.887  0.613  1.0
  Be  Be9  1  0.000  0.113  0.387  1.0
[/CIF]
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