The material structure described by La4(ErS2)11 crystallizes in the monoclinic C2/m space group. There are six inequivalent Er sites. In the first Er site, Er(1) is bonded to one S(2), one S(9), two equivalent S(8), and three equivalent S(11) atoms to form distorted ErS7 pentagonal bipyramids that share  a cornercorner with one Er(4)S6 octahedra, corners with two equivalent Er(3)S6 octahedra, edges with two equivalent Er(4)S6 octahedra, and edges with four equivalent Er(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 39-50°. In the second Er site, Er(2) is bonded to one S(4), one S(7), two equivalent S(1), and two equivalent S(10) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles range from 49-59°. In the third Er site, Er(3) is bonded to one S(3), one S(6), two equivalent S(5), and two equivalent S(9) atoms to form ErS6 octahedra that share corners with three equivalent Er(4)S6 octahedra, corners with two equivalent Er(1)S7 pentagonal bipyramids, edges with two equivalent Er(3)S6 octahedra, and edges with two equivalent Er(5)S6 octahedra. The corner-sharing octahedral tilt angles range from 51-63°. In the fourth Er site, Er(4) is bonded to one S(11), two equivalent S(2), and three equivalent S(3) atoms to form ErS6 octahedra that share corners with three equivalent Er(3)S6 octahedra,  a cornercorner with one Er(1)S7 pentagonal bipyramid, edges with four equivalent Er(4)S6 octahedra, and edges with two equivalent Er(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 51-63°. In the fifth Er site, Er(5) is bonded to one S(10), one S(5), two equivalent S(4), and two equivalent S(6) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles range from 49-59°. In the sixth Er site, Er(6) is bonded to two equivalent S(10) and four equivalent S(7) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one S(1), one S(9), two equivalent S(6), two equivalent S(7), and two equivalent S(8) atoms. In the second La site, La(2) is bonded in a 8-coordinate geometry to one S(4), one S(8), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. There are eleven inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Er(2), one La(1), and two equivalent La(2) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(6)La2Er3 square pyramids, corners with two equivalent S(2)La2Er3 trigonal bipyramids, corners with two equivalent S(5)La2Er3 trigonal bipyramids,  a cornercorner with one S(9)LaEr3 trigonal pyramid, edges with two equivalent S(7)La2Er3 square pyramids,  an edgeedge with one S(2)La2Er3 trigonal bipyramid,  an edgeedge with one S(5)La2Er3 trigonal bipyramid, edges with two equivalent S(1)La3Er2 trigonal bipyramids, and edges with two equivalent S(8)La3Er2 trigonal bipyramids. In the second S site, S(2) is bonded to one Er(1), two equivalent Er(4), and two equivalent La(2) atoms to form SLa2Er3 trigonal bipyramids that share corners with two equivalent S(5)La2Er3 trigonal bipyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids,  a cornercorner with one S(11)Er4 trigonal pyramid,  a cornercorner with one S(9)LaEr3 trigonal pyramid,  an edgeedge with one S(5)La2Er3 trigonal bipyramid,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, edges with two equivalent S(2)La2Er3 trigonal bipyramids, edges with two equivalent S(8)La3Er2 trigonal bipyramids, and edges with two equivalent S(11)Er4 trigonal pyramids. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Er(3) and three equivalent Er(4) atoms. In the fourth S site, S(4) is bonded in a 3-coordinate geometry to one Er(2), two equivalent Er(5), and one La(2) atom. In the fifth S site, S(5) is bonded to one Er(5), two equivalent Er(3), and two equivalent La(2) atoms to form SLa2Er3 trigonal bipyramids that share corners with two equivalent S(2)La2Er3 trigonal bipyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(8)La3Er2 trigonal bipyramids, corners with two equivalent S(9)LaEr3 trigonal pyramids, edges with two equivalent S(6)La2Er3 square pyramids,  an edgeedge with one S(2)La2Er3 trigonal bipyramid,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, edges with two equivalent S(5)La2Er3 trigonal bipyramids, and  an edgeedge with one S(9)LaEr3 trigonal pyramid. In the sixth S site, S(6) is bonded to one Er(3), two equivalent Er(5), and two equivalent La(1) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(7)La2Er3 square pyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(8)La3Er2 trigonal bipyramids,  an edgeedge with one S(7)La2Er3 square pyramid, edges with two equivalent S(6)La2Er3 square pyramids,  an edgeedge with one S(8)La3Er2 trigonal bipyramid, edges with two equivalent S(5)La2Er3 trigonal bipyramids, and edges with two equivalent S(9)LaEr3 trigonal pyramids. In the seventh S site, S(7) is bonded to one Er(2), two equivalent Er(6), and two equivalent La(1) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(6)La2Er3 square pyramids, corners with two equivalent S(7)La2Er3 square pyramids, corners with two equivalent S(8)La3Er2 trigonal bipyramids, corners with two equivalent S(9)LaEr3 trigonal pyramids,  an edgeedge with one S(6)La2Er3 square pyramid, edges with three equivalent S(7)La2Er3 square pyramids,  an edgeedge with one S(8)La3Er2 trigonal bipyramid, and edges with two equivalent S(1)La3Er2 trigonal bipyramids. In the eighth S site, S(8) is bonded to two equivalent Er(1), one La(2), and two equivalent La(1) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(6)La2Er3 square pyramids, corners with two equivalent S(7)La2Er3 square pyramids, corners with two equivalent S(5)La2Er3 trigonal bipyramids, corners with four equivalent S(11)Er4 trigonal pyramids,  an edgeedge with one S(6)La2Er3 square pyramid,  an edgeedge with one S(7)La2Er3 square pyramid, edges with two equivalent S(2)La2Er3 trigonal bipyramids, edges with two equivalent S(1)La3Er2 trigonal bipyramids, edges with two equivalent S(8)La3Er2 trigonal bipyramids,  an edgeedge with one S(11)Er4 trigonal pyramid, and edges with two equivalent S(9)LaEr3 trigonal pyramids. In the ninth S site, S(9) is bonded to one Er(1), two equivalent Er(3), and one La(1) atom to form SLaEr3 trigonal pyramids that share corners with two equivalent S(7)La2Er3 square pyramids,  a cornercorner with one S(2)La2Er3 trigonal bipyramid,  a cornercorner with one S(1)La3Er2 trigonal bipyramid, corners with two equivalent S(5)La2Er3 trigonal bipyramids, corners with two equivalent S(9)LaEr3 trigonal pyramids, corners with three equivalent S(11)Er4 trigonal pyramids, edges with two equivalent S(6)La2Er3 square pyramids,  an edgeedge with one S(5)La2Er3 trigonal bipyramid, and edges with two equivalent S(8)La3Er2 trigonal bipyramids. In the tenth S site, S(10) is bonded in a rectangular see-saw-like geometry to one Er(5), one Er(6), and two equivalent Er(2) atoms. In the eleventh S site, S(11) is bonded to one Er(4) and three equivalent Er(1) atoms to form distorted SEr4 trigonal pyramids that share  a cornercorner with one S(2)La2Er3 trigonal bipyramid, corners with four equivalent S(8)La3Er2 trigonal bipyramids, corners with two equivalent S(11)Er4 trigonal pyramids, corners with three equivalent S(9)LaEr3 trigonal pyramids,  an edgeedge with one S(8)La3Er2 trigonal bipyramid, edges with two equivalent S(2)La2Er3 trigonal bipyramids, and edges with two equivalent S(11)Er4 trigonal pyramids. is represented by the CIF card [CIF]
data_La4(ErS2)11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.728
_cell_length_b   19.728
_cell_length_c   11.369
_cell_angle_alpha   88.610
_cell_angle_beta   88.610
_cell_angle_gamma   11.538
_symmetry_Int_Tables_number   1
_cell_volume   884.756
_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
  La  La0  1  0.104  0.104  0.988  1.0
  La  La1  1  0.896  0.896  0.012  1.0
  La  La2  1  0.367  0.367  0.653  1.0
  La  La3  1  0.633  0.633  0.347  1.0
  Er  Er4  1  0.798  0.798  0.942  1.0
  Er  Er5  1  0.202  0.202  0.058  1.0
  Er  Er6  1  0.462  0.462  0.729  1.0
  Er  Er7  1  0.538  0.538  0.271  1.0
  Er  Er8  1  0.658  0.658  0.698  1.0
  Er  Er9  1  0.342  0.342  0.302  1.0
  Er  Er10  1  0.264  0.264  0.648  1.0
  Er  Er11  1  0.736  0.736  0.352  1.0
  Er  Er12  1  0.069  0.069  0.640  1.0
  Er  Er13  1  0.931  0.931  0.360  1.0
  Er  Er14  1  0.000  0.000  0.000  1.0
  S  S15  1  0.087  0.087  0.248  1.0
  S  S16  1  0.913  0.913  0.752  1.0
  S  S17  1  0.189  0.189  0.308  1.0
  S  S18  1  0.811  0.811  0.692  1.0
  S  S19  1  0.280  0.280  0.410  1.0
  S  S20  1  0.720  0.720  0.590  1.0
  S  S21  1  0.446  0.446  0.505  1.0
  S  S22  1  0.554  0.554  0.495  1.0
  S  S23  1  0.134  0.134  0.548  1.0
  S  S24  1  0.866  0.866  0.452  1.0
  S  S25  1  0.593  0.593  0.787  1.0
  S  S26  1  0.407  0.407  0.213  1.0
  S  S27  1  0.454  0.454  0.968  1.0
  S  S28  1  0.546  0.546  0.032  1.0
  S  S29  1  0.350  0.350  0.909  1.0
  S  S30  1  0.650  0.650  0.091  1.0
  S  S31  1  0.169  0.169  0.848  1.0
  S  S32  1  0.831  0.831  0.152  1.0
  S  S33  1  0.008  0.008  0.761  1.0
  S  S34  1  0.992  0.992  0.239  1.0
  S  S35  1  0.255  0.255  0.881  1.0
  S  S36  1  0.745  0.745  0.119  1.0
[/CIF]
.
The material structure described by La4(ErS2)11 crystallizes in the monoclinic C2/m space group. There are six inequivalent Er sites. In the first Er site, Er(1) is bonded to one S(2), one S(9), two equivalent S(8), and three equivalent S(11) atoms to form distorted ErS7 pentagonal bipyramids that share  a cornercorner with one Er(4)S6 octahedra, corners with two equivalent Er(3)S6 octahedra, edges with two equivalent Er(4)S6 octahedra, and edges with four equivalent Er(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 39-50°. In the second Er site, Er(2) is bonded to one S(4), one S(7), two equivalent S(1), and two equivalent S(10) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles range from 49-59°. In the third Er site, Er(3) is bonded to one S(3), one S(6), two equivalent S(5), and two equivalent S(9) atoms to form ErS6 octahedra that share corners with three equivalent Er(4)S6 octahedra, corners with two equivalent Er(1)S7 pentagonal bipyramids, edges with two equivalent Er(3)S6 octahedra, and edges with two equivalent Er(5)S6 octahedra. The corner-sharing octahedral tilt angles range from 51-63°. In the fourth Er site, Er(4) is bonded to one S(11), two equivalent S(2), and three equivalent S(3) atoms to form ErS6 octahedra that share corners with three equivalent Er(3)S6 octahedra,  a cornercorner with one Er(1)S7 pentagonal bipyramid, edges with four equivalent Er(4)S6 octahedra, and edges with two equivalent Er(1)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 51-63°. In the fifth Er site, Er(5) is bonded to one S(10), one S(5), two equivalent S(4), and two equivalent S(6) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles range from 49-59°. In the sixth Er site, Er(6) is bonded to two equivalent S(10) and four equivalent S(7) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one S(1), one S(9), two equivalent S(6), two equivalent S(7), and two equivalent S(8) atoms. In the second La site, La(2) is bonded in a 8-coordinate geometry to one S(4), one S(8), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. There are eleven inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Er(2), one La(1), and two equivalent La(2) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(6)La2Er3 square pyramids, corners with two equivalent S(2)La2Er3 trigonal bipyramids, corners with two equivalent S(5)La2Er3 trigonal bipyramids,  a cornercorner with one S(9)LaEr3 trigonal pyramid, edges with two equivalent S(7)La2Er3 square pyramids,  an edgeedge with one S(2)La2Er3 trigonal bipyramid,  an edgeedge with one S(5)La2Er3 trigonal bipyramid, edges with two equivalent S(1)La3Er2 trigonal bipyramids, and edges with two equivalent S(8)La3Er2 trigonal bipyramids. In the second S site, S(2) is bonded to one Er(1), two equivalent Er(4), and two equivalent La(2) atoms to form SLa2Er3 trigonal bipyramids that share corners with two equivalent S(5)La2Er3 trigonal bipyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids,  a cornercorner with one S(11)Er4 trigonal pyramid,  a cornercorner with one S(9)LaEr3 trigonal pyramid,  an edgeedge with one S(5)La2Er3 trigonal bipyramid,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, edges with two equivalent S(2)La2Er3 trigonal bipyramids, edges with two equivalent S(8)La3Er2 trigonal bipyramids, and edges with two equivalent S(11)Er4 trigonal pyramids. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Er(3) and three equivalent Er(4) atoms. In the fourth S site, S(4) is bonded in a 3-coordinate geometry to one Er(2), two equivalent Er(5), and one La(2) atom. In the fifth S site, S(5) is bonded to one Er(5), two equivalent Er(3), and two equivalent La(2) atoms to form SLa2Er3 trigonal bipyramids that share corners with two equivalent S(2)La2Er3 trigonal bipyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(8)La3Er2 trigonal bipyramids, corners with two equivalent S(9)LaEr3 trigonal pyramids, edges with two equivalent S(6)La2Er3 square pyramids,  an edgeedge with one S(2)La2Er3 trigonal bipyramid,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, edges with two equivalent S(5)La2Er3 trigonal bipyramids, and  an edgeedge with one S(9)LaEr3 trigonal pyramid. In the sixth S site, S(6) is bonded to one Er(3), two equivalent Er(5), and two equivalent La(1) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(7)La2Er3 square pyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(8)La3Er2 trigonal bipyramids,  an edgeedge with one S(7)La2Er3 square pyramid, edges with two equivalent S(6)La2Er3 square pyramids,  an edgeedge with one S(8)La3Er2 trigonal bipyramid, edges with two equivalent S(5)La2Er3 trigonal bipyramids, and edges with two equivalent S(9)LaEr3 trigonal pyramids. In the seventh S site, S(7) is bonded to one Er(2), two equivalent Er(6), and two equivalent La(1) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(6)La2Er3 square pyramids, corners with two equivalent S(7)La2Er3 square pyramids, corners with two equivalent S(8)La3Er2 trigonal bipyramids, corners with two equivalent S(9)LaEr3 trigonal pyramids,  an edgeedge with one S(6)La2Er3 square pyramid, edges with three equivalent S(7)La2Er3 square pyramids,  an edgeedge with one S(8)La3Er2 trigonal bipyramid, and edges with two equivalent S(1)La3Er2 trigonal bipyramids. In the eighth S site, S(8) is bonded to two equivalent Er(1), one La(2), and two equivalent La(1) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(6)La2Er3 square pyramids, corners with two equivalent S(7)La2Er3 square pyramids, corners with two equivalent S(5)La2Er3 trigonal bipyramids, corners with four equivalent S(11)Er4 trigonal pyramids,  an edgeedge with one S(6)La2Er3 square pyramid,  an edgeedge with one S(7)La2Er3 square pyramid, edges with two equivalent S(2)La2Er3 trigonal bipyramids, edges with two equivalent S(1)La3Er2 trigonal bipyramids, edges with two equivalent S(8)La3Er2 trigonal bipyramids,  an edgeedge with one S(11)Er4 trigonal pyramid, and edges with two equivalent S(9)LaEr3 trigonal pyramids. In the ninth S site, S(9) is bonded to one Er(1), two equivalent Er(3), and one La(1) atom to form SLaEr3 trigonal pyramids that share corners with two equivalent S(7)La2Er3 square pyramids,  a cornercorner with one S(2)La2Er3 trigonal bipyramid,  a cornercorner with one S(1)La3Er2 trigonal bipyramid, corners with two equivalent S(5)La2Er3 trigonal bipyramids, corners with two equivalent S(9)LaEr3 trigonal pyramids, corners with three equivalent S(11)Er4 trigonal pyramids, edges with two equivalent S(6)La2Er3 square pyramids,  an edgeedge with one S(5)La2Er3 trigonal bipyramid, and edges with two equivalent S(8)La3Er2 trigonal bipyramids. In the tenth S site, S(10) is bonded in a rectangular see-saw-like geometry to one Er(5), one Er(6), and two equivalent Er(2) atoms. In the eleventh S site, S(11) is bonded to one Er(4) and three equivalent Er(1) atoms to form distorted SEr4 trigonal pyramids that share  a cornercorner with one S(2)La2Er3 trigonal bipyramid, corners with four equivalent S(8)La3Er2 trigonal bipyramids, corners with two equivalent S(11)Er4 trigonal pyramids, corners with three equivalent S(9)LaEr3 trigonal pyramids,  an edgeedge with one S(8)La3Er2 trigonal bipyramid, edges with two equivalent S(2)La2Er3 trigonal bipyramids, and edges with two equivalent S(11)Er4 trigonal pyramids. is represented by the CIF card [CIF]
data_La4(ErS2)11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.728
_cell_length_b   19.728
_cell_length_c   11.369
_cell_angle_alpha   88.610
_cell_angle_beta   88.610
_cell_angle_gamma   11.538
_symmetry_Int_Tables_number   1
_cell_volume   884.756
_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
  La  La0  1  0.104  0.104  0.988  1.0
  La  La1  1  0.896  0.896  0.012  1.0
  La  La2  1  0.367  0.367  0.653  1.0
  La  La3  1  0.633  0.633  0.347  1.0
  Er  Er4  1  0.798  0.798  0.942  1.0
  Er  Er5  1  0.202  0.202  0.058  1.0
  Er  Er6  1  0.462  0.462  0.729  1.0
  Er  Er7  1  0.538  0.538  0.271  1.0
  Er  Er8  1  0.658  0.658  0.698  1.0
  Er  Er9  1  0.342  0.342  0.302  1.0
  Er  Er10  1  0.264  0.264  0.648  1.0
  Er  Er11  1  0.736  0.736  0.352  1.0
  Er  Er12  1  0.069  0.069  0.640  1.0
  Er  Er13  1  0.931  0.931  0.360  1.0
  Er  Er14  1  0.000  0.000  0.000  1.0
  S  S15  1  0.087  0.087  0.248  1.0
  S  S16  1  0.913  0.913  0.752  1.0
  S  S17  1  0.189  0.189  0.308  1.0
  S  S18  1  0.811  0.811  0.692  1.0
  S  S19  1  0.280  0.280  0.410  1.0
  S  S20  1  0.720  0.720  0.590  1.0
  S  S21  1  0.446  0.446  0.505  1.0
  S  S22  1  0.554  0.554  0.495  1.0
  S  S23  1  0.134  0.134  0.548  1.0
  S  S24  1  0.866  0.866  0.452  1.0
  S  S25  1  0.593  0.593  0.787  1.0
  S  S26  1  0.407  0.407  0.213  1.0
  S  S27  1  0.454  0.454  0.968  1.0
  S  S28  1  0.546  0.546  0.032  1.0
  S  S29  1  0.350  0.350  0.909  1.0
  S  S30  1  0.650  0.650  0.091  1.0
  S  S31  1  0.169  0.169  0.848  1.0
  S  S32  1  0.831  0.831  0.152  1.0
  S  S33  1  0.008  0.008  0.761  1.0
  S  S34  1  0.992  0.992  0.239  1.0
  S  S35  1  0.255  0.255  0.881  1.0
  S  S36  1  0.745  0.745  0.119  1.0
[/CIF]
.