data_Sr2LaO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.2
_cell_length_b   7.2
_cell_length_c   7.2
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2LaO4
_chemical_formula_sum   'Sr4 La2 O8'
_cell_volume   263.96
_cell_formula_units_Z   2
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  Sr10  1  0.82  0.82  0.36  1.0
  Sr  Sr11  1  0.36  0.82  0.82  1.0
  Sr  Sr12  1  0.36  0.36  0.36  1.0
  Sr  Sr13  1  0.82  0.36  0.82  1.0
  La  La0  1  0.0  0.0  0.0  1.0
  La  La1  1  0.55  0.55  0.55  1.0
  O  O2  1  0.86  0.86  0.86  1.0
  O  O3  1  0.86  0.32  0.32  1.0
  O  O4  1  0.32  0.86  0.32  1.0
  O  O5  1  0.41  0.41  0.87  1.0
  O  O6  1  0.32  0.32  0.86  1.0
  O  O7  1  0.41  0.87  0.41  1.0
  O  O8  1  0.87  0.87  0.87  1.0
  O  O9  1  0.87  0.41  0.41  1.0

data_Sr2LaO4
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.2
_cell_length_b   7.2
_cell_length_c   17.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sr2LaO4
_chemical_formula_sum   'Sr12 La6 O24'
_cell_volume   791.88
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  9  0.18  0.36  1.0  1.0
  Sr  Sr1  3  0.0  0.0  0.64  1.0
  La  La2  3  0.0  0.0  0.0  1.0
  La  La3  3  0.0  0.0  0.45  1.0
  O  O4  9  0.02  0.51  0.11  1.0
  O  O5  9  0.18  0.36  0.5  1.0
  O  O6  3  0.0  0.0  0.13  1.0
  O  O7  3  0.0  0.0  0.14  1.0

Sr Sr Sr Sr La La O O O O O O O O
Sr2LaO4 crystallizes in the trigonal R3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 3-coordinate geometry to one La(1) and two equivalent O(3) atoms. The Sr(1)-La(1) bond length is 2.27 Å. Both Sr(1)-O(3) bond lengths are 2.69 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to three equivalent O(2) and three equivalent O(3) atoms. All Sr(2)-O(2) bond lengths are 3.30 Å. All Sr(2)-O(3) bond lengths are 3.30 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a distorted trigonal pyramidal geometry to three equivalent Sr(1) and one O(4) atom. The La(1)-O(4) bond length is 2.32 Å. In the second La site, La(2) is bonded in a distorted trigonal planar geometry to three equivalent O(3) atoms. All La(2)-O(3) bond lengths are 1.94 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one O(4) atom. The O(1)-O(4) bond length is 0.16 Å. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Sr(2) and one O(3) atom. The O(2)-O(3) bond length is 1.07 Å. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), one La(2), and one O(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one La(1) and one O(1) atom.