data_SrCaSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.09
_cell_length_b   4.94
_cell_length_c   9.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrCaSi
_chemical_formula_sum   'Sr4 Ca4 Si4'
_cell_volume   365.93
_cell_formula_units_Z   4
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  Sr8  1  0.17  0.23  0.22  1.0
  Sr  Sr9  1  0.87  0.7  0.64  1.0
  Sr  Sr10  1  0.92  0.7  0.94  1.0
  Sr  Sr11  1  0.22  0.23  0.52  1.0
  Ca  Ca0  1  0.2  0.23  0.67  1.0
  Ca  Ca1  1  0.85  0.7  0.25  1.0
  Ca  Ca2  1  0.89  0.7  0.49  1.0
  Ca  Ca3  1  0.24  0.23  0.91  1.0
  Si  Si4  1  0.16  0.23  0.61  1.0
  Si  Si5  1  0.89  0.7  0.19  1.0
  Si  Si6  1  0.94  0.7  0.55  1.0
  Si  Si7  1  0.2  0.23  0.97  1.0

data_SrCaSi
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.94
_cell_length_b   8.09
_cell_length_c   9.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   SrCaSi
_chemical_formula_sum   'Sr4 Ca4 Si4'
_cell_volume   365.93
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  Sr0  2  0.27  0.63  0.64  1.0
  Sr  Sr1  2  0.27  0.67  0.94  1.0
  Ca  Ca2  2  0.27  0.65  0.09  1.0
  Ca  Ca3  2  0.27  0.7  0.33  1.0
  Si  Si4  2  0.27  0.61  0.03  1.0
  Si  Si5  2  0.27  0.66  0.39  1.0

Sr Sr Sr Sr Ca Ca Ca Ca Si Si Si Si
SrCaSi crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of four SrCaSi clusters. Sr(1) is bonded in a 1-coordinate geometry to one Si(2) atom. The Sr(1)-Si(2) bond length is 2.24 Å. Ca(2) is bonded in a single-bond geometry to one Si(2) atom. The Ca(2)-Si(2) bond length is 0.69 Å. Si(2) is bonded in a distorted single-bond geometry to one Sr(1) and one Ca(2) atom.