data_SiAsRu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.87
_cell_length_b   7.87
_cell_length_c   7.87
_cell_angle_alpha   21.35
_cell_angle_beta   21.35
_cell_angle_gamma   21.35
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAsRu2
_chemical_formula_sum   'Si1 As1 Ru2'
_cell_volume   56.59
_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
  Si  Si3  1  0.0  0.0  0.0  1.0
  As  As0  1  0.0  0.0  0.53  1.0
  Ru  Ru1  1  0.0  0.0  0.22  1.0
  Ru  Ru2  1  0.0  0.0  0.84  1.0

data_SiAsRu2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.05
_cell_length_b   2.92
_cell_length_c   7.87
_cell_angle_alpha   90.0
_cell_angle_beta   102.35
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiAsRu2
_chemical_formula_sum   'Si2 As2 Ru4'
_cell_volume   113.18
_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
  Si  Si0  2  0.0  0.0  0.0  1.0
  As  As1  2  0.0  0.0  0.47  1.0
  Ru  Ru2  2  0.0  0.0  0.16  1.0
  Ru  Ru3  2  0.0  0.0  0.78  1.0

Si As Ru Ru
Ru2SiAs crystallizes in the monoclinic Cm space group. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a distorted single-bond geometry to one Si(1) and one As(1) atom. The Ru(1)-Si(1) bond length is 1.73 Å. The Ru(1)-As(1) bond length is 2.45 Å. In the second Ru site, Ru(2) is bonded in a single-bond geometry to one Si(1) and one As(1) atom. The Ru(2)-Si(1) bond length is 1.23 Å. The Ru(2)-As(1) bond length is 2.45 Å. Si(1) is bonded in a linear geometry to one Ru(1) and one Ru(2) atom. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted linear geometry to one Ru(1); one Ru(2); and six As(1,1) atoms. All As(1)-As(1,1) bond lengths are 2.92 Å. In the second As site, As(1) is bonded in a distorted linear geometry to one Ru(1); one Ru(2); and six As(1,1) atoms. The As(1)-Ru(1) bond length is 2.45 Å. The As(1)-Ru(2) bond length is 2.45 Å. Both As(1)-As(1) bond lengths are 2.92 Å.