data_Sr2LaOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.67
_cell_length_b   3.67
_cell_length_c   10.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2LaOs
_chemical_formula_sum   'Sr2 La1 Os1'
_cell_volume   141.04
_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  Sr2  1  0.0  0.0  0.58  1.0
  Sr  Sr3  1  0.84  0.84  0.79  1.0
  La  La0  1  0.0  0.0  0.15  1.0
  Os  Os1  1  0.84  0.84  0.6  1.0

data_Sr2LaOs
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   10.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr2LaOs
_chemical_formula_sum   'Sr4 La2 Os2'
_cell_volume   282.09
_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  0.58  1.0
  Sr  Sr1  2  0.34  0.5  0.79  1.0
  La  La2  2  0.0  0.0  0.15  1.0
  Os  Os3  2  0.34  0.5  0.6  1.0

Sr Sr La Os
Sr2LaOs crystallizes in the monoclinic Cm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a single-bond geometry to one La(1) and one Os(1) atom. The Sr(1)-La(1) bond length is 4.49 Å. The Sr(1)-Os(1) bond length is 0.88 Å. In the second Sr site, Sr(2) is bonded in a single-bond geometry to one La(1) and one Os(1) atom. The Sr(2)-La(1) bond length is 3.79 Å. The Sr(2)-Os(1) bond length is 2.02 Å. La(1) is bonded to one Sr(1), one Sr(2), and four equivalent La(1) atoms to form a mixture of corner and edge-sharing LaSr2La4 octahedra. The corner-sharing octahedra are not tilted. All La(1)-La(1) bond lengths are 3.67 Å. Os(1) is bonded in a 1-coordinate geometry to one Sr(1) and one Sr(2) atom.