data_TaAlRu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.55
_cell_length_b   8.55
_cell_length_c   8.55
_cell_angle_alpha   19.52
_cell_angle_beta   19.52
_cell_angle_gamma   19.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaAlRu2
_chemical_formula_sum   'Ta1 Al1 Ru2'
_cell_volume   60.94
_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
  Ta  Ta3  1  0.0  0.0  0.57  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Ru  Ru1  1  0.0  0.0  0.79  1.0
  Ru  Ru2  1  0.0  0.0  0.36  1.0

data_TaAlRu2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.02
_cell_length_b   2.9
_cell_length_c   8.55
_cell_angle_alpha   90.0
_cell_angle_beta   101.29
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TaAlRu2
_chemical_formula_sum   'Ta2 Al2 Ru4'
_cell_volume   121.88
_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
  Ta  Ta0  2  0.0  0.0  0.43  1.0
  Al  Al1  2  0.0  0.0  0.0  1.0
  Ru  Ru2  2  0.0  0.0  0.21  1.0
  Ru  Ru3  2  0.0  0.0  0.64  1.0

Ta Al Ru Ru
Ru2AlTa crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ru2AlTa clusters. Ta(1) is bonded in a linear geometry to one Ru(1) and one Ru(2) atom. The Ta(1)-Ru(1) bond length is 1.83 Å. The Ta(1)-Ru(2) bond length is 1.83 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a linear geometry to one Ta(1) and one Al(1) atom. The Ru(1)-Al(1) bond length is 1.83 Å. In the second Ru site, Ru(2) is bonded in a single-bond geometry to one Ta(1) atom. Al(1) is bonded in a distorted single-bond geometry to one Ru(1) atom.