data_SrRuCl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.97
_cell_length_b   4.97
_cell_length_c   4.97
_cell_angle_alpha   120.8
_cell_angle_beta   120.8
_cell_angle_gamma   88.63
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrRuCl2
_chemical_formula_sum   'Sr1 Ru1 Cl2'
_cell_volume   85.97
_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  Sr3  1  0.0  0.0  0.0  1.0
  Ru  Ru2  1  0.0  0.0  0.56  1.0
  Cl  Cl0  1  0.46  0.0  0.78  1.0
  Cl  Cl1  1  0.0  0.46  0.78  1.0

data_SrRuCl2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.95
_cell_length_b   6.95
_cell_length_c   4.97
_cell_angle_alpha   90.0
_cell_angle_beta   134.31
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrRuCl2
_chemical_formula_sum   'Sr2 Ru2 Cl4'
_cell_volume   171.93
_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
  Sr  Sr0  2  0.0  0.0  0.0  1.0
  Ru  Ru1  2  0.44  0.0  0.44  1.0
  Cl  Cl2  4  0.45  0.23  0.68  1.0

Sr Ru Cl Cl
SrRuCl2 crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 3-coordinate geometry to two equivalent Ru(1) and two equivalent Cl(1) atoms. There is one shorter (2.19 Å) and one longer (2.78 Å) Sr(1)-Ru(1) bond length. Both Sr(1)-Cl(1) bond lengths are 2.34 Å. Ru(1) is bonded in a distorted see-saw-like geometry to two equivalent Sr(1) and two equivalent Cl(1) atoms. Both Ru(1)-Cl(1) bond lengths are 1.95 Å. Cl(1) is bonded in a linear geometry to one Sr(1) and one Ru(1) atom.