data_SrSi2Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.9
_cell_length_b   6.9
_cell_length_c   6.9
_cell_angle_alpha   147.41
_cell_angle_beta   147.41
_cell_angle_gamma   46.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrSi2Cl
_chemical_formula_sum   'Sr1 Si2 Cl1'
_cell_volume   95.14
_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  0.34  1.0
  Si  Si1  1  0.94  0.0  0.17  1.0
  Si  Si2  1  0.0  0.94  0.17  1.0
  Cl  Cl0  1  0.0  0.0  0.0  1.0

data_SrSi2Cl
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.48
_cell_length_b   5.48
_cell_length_c   6.9
_cell_angle_alpha   90.0
_cell_angle_beta   113.38
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrSi2Cl
_chemical_formula_sum   'Sr2 Si4 Cl2'
_cell_volume   190.29
_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  0.66  1.0
  Si  Si1  4  0.47  0.47  0.77  1.0
  Cl  Cl2  2  0.0  0.0  0.0  1.0

Sr Si Si Cl
Sr Si Si Cl 0 1 - o o 0 2 o - o 1 2 + - o 1 3 + o o 2 3 o + o 
SrSi2Cl crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrSi2Cl clusters. Sr(1) is bonded in a 2-coordinate geometry to two equivalent Si(1) atoms. Both Sr(1)-Si(1) bond lengths are 0.83 Å. Si(1) is bonded in a 3-coordinate geometry to one Sr(1), one Si(1), and one Cl(1) atom. The Si(1)-Si(1) bond length is 0.34 Å. The Si(1)-Cl(1) bond length is 1.55 Å. Cl(1) is bonded in a 2-coordinate geometry to two equivalent Si(1) atoms.