data_Ac3Ru
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.44
_cell_length_b   6.44
_cell_length_c   6.44
_cell_angle_alpha   135.95
_cell_angle_beta   135.95
_cell_angle_gamma   64.06
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ac3Ru
_chemical_formula_sum   'Ac3 Ru1'
_cell_volume   127.17
_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
  Ac  Ac0  1  0.0  0.41  0.73  1.0
  Ac  Ac1  1  0.41  0.0  0.73  1.0
  Ac  Ac2  1  0.0  0.0  0.46  1.0
  Ru  Ru3  1  0.0  0.0  0.0  1.0

data_Ac3Ru
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.83
_cell_length_b   6.83
_cell_length_c   6.44
_cell_angle_alpha   90.0
_cell_angle_beta   122.03
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ac3Ru
_chemical_formula_sum   'Ac6 Ru2'
_cell_volume   254.34
_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
  Ac  Ac0  4  0.48  0.21  0.69  1.0
  Ac  Ac1  2  0.04  0.5  0.54  1.0
  Ru  Ru2  2  0.0  0.0  0.0  1.0

Ac Ac Ac Ru
Ac3Ru crystallizes in the monoclinic Cm space group. There are two inequivalent Ac sites. In the first Ac site, Ac(1) is bonded in a 2-coordinate geometry to one Ac(2) and two equivalent Ru(1) atoms. The Ac(1)-Ac(2) bond length is 1.86 Å. There is one shorter (2.79 Å) and one longer (3.33 Å) Ac(1)-Ru(1) bond length. In the second Ac site, Ac(2) is bonded in a distorted see-saw-like geometry to two equivalent Ac(1) and two equivalent Ru(1) atoms. There is one shorter (2.94 Å) and one longer (3.50 Å) Ac(2)-Ru(1) bond length. Ru(1) is bonded in a 6-coordinate geometry to two equivalent Ac(2) and four equivalent Ac(1) atoms.