data_SrTa2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.21
_cell_length_b   5.21
_cell_length_c   2.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrTa2
_chemical_formula_sum   'Sr1 Ta2'
_cell_volume   67.73
_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
  Sr  Sr0  1  0.0  0.0  0.0  1.0
  Ta  Ta1  1  0.0  0.01  0.86  1.0
  Ta  Ta2  1  0.6  0.5  0.02  1.0

data_SrTa2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.89
_cell_length_b   5.21
_cell_length_c   5.21
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrTa2
_chemical_formula_sum   'Sr1 Ta2'
_cell_volume   67.73
_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
  Sr  Sr0  1  0.0  0.0  0.0  1.0
  Ta  Ta1  1  0.02  0.6  0.5  1.0
  Ta  Ta2  1  0.86  0.0  0.01  1.0

Sr Ta Ta
Sr Ta Ta 0 1 o o - 0 2 o o o 0 2 - - o 1 2 o o + 1 2 - - + 2 2 o o + 
SrTa2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one SrTa2 cluster. Sr(1) is bonded in a single-bond geometry to one Ta(1) and one Ta(2) atom. The Sr(1)-Ta(1) bond length is 0.39 Å. The Sr(1)-Ta(2) bond length is 2.37 Å. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Sr(1) atom. In the second Ta site, Ta(2) is bonded in a 1-coordinate geometry to one Sr(1) atom.