The crystal structure described by Sr4LaCl11 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to four equivalent Cl(1) and four equivalent Cl(3) atoms. In the second Sr site, Sr(2) is bonded in a body-centered cubic geometry to four equivalent Cl(1) and four equivalent Cl(2) atoms. La(1) is bonded to four equivalent Cl(4) and eight equivalent Cl(3) atoms to form a mixture of corner and face-sharing LaCl12 cuboctahedra. There are four inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to two equivalent Sr(1) and two equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with four equivalent Cl(1)Sr4 tetrahedra, corners with six equivalent Cl(3)Sr2La2 tetrahedra, corners with six equivalent Cl(2)Sr4 tetrahedra,  an edgeedge with one Cl(3)Sr2La2 tetrahedra,  an edgeedge with one Cl(2)Sr4 tetrahedra, and edges with four equivalent Cl(1)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to four equivalent Sr(2) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the third Cl site, Cl(3) is bonded to two equivalent Sr(1) and two equivalent La(1) atoms to form ClSr2La2 tetrahedra that share corners with six equivalent Cl(1)Sr4 tetrahedra, corners with ten equivalent Cl(3)Sr2La2 tetrahedra,  an edgeedge with one Cl(1)Sr4 tetrahedra, and edges with five equivalent Cl(3)Sr2La2 tetrahedra. In the fourth Cl site, Cl(4) is bonded in a square co-planar geometry to four equivalent La(1) atoms. is represented by the CIF file [CIF]
data_Sr4LaCl11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   18.285
_cell_length_b   18.285
_cell_length_c   18.285
_cell_angle_alpha   164.599
_cell_angle_beta   164.599
_cell_angle_gamma   21.847
_symmetry_Int_Tables_number   1
_cell_volume   431.072
_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  Sr0  1  0.103  0.103  0.000  1.0
  Sr  Sr1  1  0.897  0.897  0.000  1.0
  Sr  Sr2  1  0.299  0.299  0.000  1.0
  Sr  Sr3  1  0.701  0.701  0.000  1.0
  La  La4  1  0.500  0.500  0.000  1.0
  Cl  Cl5  1  0.152  0.652  0.500  1.0
  Cl  Cl6  1  0.348  0.848  0.500  1.0
  Cl  Cl7  1  0.750  0.250  0.500  1.0
  Cl  Cl8  1  0.555  0.055  0.500  1.0
  Cl  Cl9  1  0.945  0.445  0.500  1.0
  Cl  Cl10  1  0.055  0.555  0.500  1.0
  Cl  Cl11  1  0.250  0.750  0.500  1.0
  Cl  Cl12  1  0.652  0.152  0.500  1.0
  Cl  Cl13  1  0.445  0.945  0.500  1.0
  Cl  Cl14  1  0.848  0.348  0.500  1.0
  Cl  Cl15  1  0.000  0.000  0.000  1.0
[/CIF]
.
The crystal structure described by Sr4LaCl11 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to four equivalent Cl(1) and four equivalent Cl(3) atoms. In the second Sr site, Sr(2) is bonded in a body-centered cubic geometry to four equivalent Cl(1) and four equivalent Cl(2) atoms. La(1) is bonded to four equivalent Cl(4) and eight equivalent Cl(3) atoms to form a mixture of corner and face-sharing LaCl12 cuboctahedra. There are four inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to two equivalent Sr(1) and two equivalent Sr(2) atoms to form ClSr4 tetrahedra that share corners with four equivalent Cl(1)Sr4 tetrahedra, corners with six equivalent Cl(3)Sr2La2 tetrahedra, corners with six equivalent Cl(2)Sr4 tetrahedra,  an edgeedge with one Cl(3)Sr2La2 tetrahedra,  an edgeedge with one Cl(2)Sr4 tetrahedra, and edges with four equivalent Cl(1)Sr4 tetrahedra. In the second Cl site, Cl(2) is bonded to four equivalent Sr(2) atoms to form a mixture of corner and edge-sharing ClSr4 tetrahedra. In the third Cl site, Cl(3) is bonded to two equivalent Sr(1) and two equivalent La(1) atoms to form ClSr2La2 tetrahedra that share corners with six equivalent Cl(1)Sr4 tetrahedra, corners with ten equivalent Cl(3)Sr2La2 tetrahedra,  an edgeedge with one Cl(1)Sr4 tetrahedra, and edges with five equivalent Cl(3)Sr2La2 tetrahedra. In the fourth Cl site, Cl(4) is bonded in a square co-planar geometry to four equivalent La(1) atoms. is represented by the CIF file [CIF]
data_Sr4LaCl11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   18.285
_cell_length_b   18.285
_cell_length_c   18.285
_cell_angle_alpha   164.599
_cell_angle_beta   164.599
_cell_angle_gamma   21.847
_symmetry_Int_Tables_number   1
_cell_volume   431.072
_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  Sr0  1  0.103  0.103  0.000  1.0
  Sr  Sr1  1  0.897  0.897  0.000  1.0
  Sr  Sr2  1  0.299  0.299  0.000  1.0
  Sr  Sr3  1  0.701  0.701  0.000  1.0
  La  La4  1  0.500  0.500  0.000  1.0
  Cl  Cl5  1  0.152  0.652  0.500  1.0
  Cl  Cl6  1  0.348  0.848  0.500  1.0
  Cl  Cl7  1  0.750  0.250  0.500  1.0
  Cl  Cl8  1  0.555  0.055  0.500  1.0
  Cl  Cl9  1  0.945  0.445  0.500  1.0
  Cl  Cl10  1  0.055  0.555  0.500  1.0
  Cl  Cl11  1  0.250  0.750  0.500  1.0
  Cl  Cl12  1  0.652  0.152  0.500  1.0
  Cl  Cl13  1  0.445  0.945  0.500  1.0
  Cl  Cl14  1  0.848  0.348  0.500  1.0
  Cl  Cl15  1  0.000  0.000  0.000  1.0
[/CIF]
.