data_SrLa2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.79
_cell_length_b   3.79
_cell_length_c   9.57
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrLa2Se
_chemical_formula_sum   'Sr1 La2 Se1'
_cell_volume   137.77
_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  0.9  0.9  0.64  1.0
  La  La0  1  0.0  0.0  0.17  1.0
  La  La1  1  0.9  0.9  0.9  1.0
  Se  Se2  1  0.0  0.0  0.64  1.0

data_SrLa2Se
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.37
_cell_length_b   5.37
_cell_length_c   9.57
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrLa2Se
_chemical_formula_sum   'Sr2 La4 Se2'
_cell_volume   275.53
_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  0.4  0.5  0.64  1.0
  La  La1  2  0.0  0.0  0.17  1.0
  La  La2  2  0.4  0.5  0.9  1.0
  Se  Se3  2  0.0  0.0  0.64  1.0

Sr La La Se
Sr La La Se 0 3 + + o 0 2 o o o 1 2 - - - 2 3 + + o 
SrLa2Se crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrLa2Se clusters. Sr(1) is bonded in a single-bond geometry to one La(2) and one Se(1) atom. The Sr(1)-La(2) bond length is 2.46 Å. The Sr(1)-Se(1) bond length is 0.55 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a distorted single-bond geometry to one La(2) atom. The La(1)-La(2) bond length is 2.70 Å. In the second La site, La(2) is bonded in a 3-coordinate geometry to one Sr(1), one La(1), and one Se(1) atom. The La(2)-Se(1) bond length is 2.55 Å. Se(1) is bonded in a single-bond geometry to one Sr(1) and one La(2) atom.