The crystal structure described by La10(ErS3)9 crystallizes in the monoclinic Cm space group. There are seven inequivalent Er sites. In the first Er site, Er(1) is bonded to one S(13), one S(17), two equivalent S(1), and two equivalent S(21) atoms to form ErS6 octahedra that share  a cornercorner with one Er(4)S6 octahedra, corners with two equivalent Er(8)S6 octahedra, corners with two equivalent La(10)S7 pentagonal bipyramids, edges with two equivalent Er(1)S6 octahedra,  an edgeedge with one La(10)S7 pentagonal bipyramid, and edges with two equivalent La(6)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 54-63°. In the second Er site, Er(2) is bonded to one S(15), one S(20), two equivalent S(19), and two equivalent S(2) atoms to form ErS6 octahedra that share  a cornercorner with one Er(4)S6 octahedra, corners with two equivalent Er(9)S6 octahedra, corners with two equivalent La(6)S7 pentagonal bipyramids, edges with two equivalent Er(2)S6 octahedra,  an edgeedge with one La(6)S7 pentagonal bipyramid, and edges with two equivalent La(10)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 52-65°. In the third Er site, Er(3,7) is bonded to one S(4,16); one S(6,8); two equivalent S(25); and two equivalent S(9,12) atoms to form ErS6 octahedra that share corners with two equivalent Er(3,7)S6 octahedra; corners with two equivalent Er(5,6)S7 pentagonal bipyramids; and edges with three equivalent Er(3,7)S6 octahedra. The corner-sharing octahedra are not tilted. In the fourth Er site, Er(4) is bonded to one S(13), one S(20), two equivalent S(14), and two equivalent S(5) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles range from 63-65°. In the fifth Er site, Er(5,6) is bonded to one S(23); one S(9,12); two equivalent S(7); and three equivalent S(3,18) atoms to form distorted ErS7 pentagonal bipyramids that share corners with two equivalent Er(3,7)S6 octahedra and edges with four equivalent Er(5,6)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 47°. In the sixth Er site, Er(8) is bonded to one S(11), one S(5), two equivalent S(13), and two equivalent S(26) atoms to form ErS6 octahedra that share corners with two equivalent Er(1)S6 octahedra, corners with two equivalent La(10)S7 pentagonal bipyramids, edges with two equivalent Er(4)S6 octahedra, and edges with two equivalent Er(8)S6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the seventh Er site, Er(9) is bonded to one S(14), one S(24), two equivalent S(20), and two equivalent S(22) atoms to form ErS6 octahedra that share corners with two equivalent Er(2)S6 octahedra, corners with two equivalent La(6)S7 pentagonal bipyramids, edges with two equivalent Er(4)S6 octahedra, and edges with two equivalent Er(9)S6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are ten inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one S(22), one S(7), two equivalent S(1), two equivalent S(14), and two equivalent S(23) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to one S(26); two equivalent S(11); two equivalent S(4,16); and two equivalent S(6,8) atoms. In the third La site, La(3) is bonded in a 8-coordinate geometry to one S(22); one S(9,12); two equivalent S(23); two equivalent S(3,18); and two equivalent S(6,8) atoms. In the fourth La site, La(4) is bonded in a 7-coordinate geometry to one S(22); two equivalent S(24); two equivalent S(4,16); and two equivalent S(6,8) atoms. In the fifth La site, La(5) is bonded in a 8-coordinate geometry to one S(10), one S(26), two equivalent S(2), two equivalent S(27), and two equivalent S(5) atoms. In the sixth La site, La(6) is bonded to one S(21), two equivalent S(17), two equivalent S(19), and two equivalent S(24) atoms to form distorted LaS7 pentagonal bipyramids that share corners with two equivalent Er(2)S6 octahedra, corners with two equivalent Er(9)S6 octahedra,  an edgeedge with one Er(2)S6 octahedra, edges with two equivalent Er(1)S6 octahedra, edges with two equivalent La(10)S7 pentagonal bipyramids, and faces with two equivalent La(6)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 22-68°. In the seventh La site, La(7) is bonded in a 8-coordinate geometry to one S(1); one S(9,12); two equivalent S(17); two equivalent S(4,16); and two equivalent S(7) atoms. In the eighth La site, La(8) is bonded in a 8-coordinate geometry to one S(26); one S(9,12); two equivalent S(27); two equivalent S(3,18); and two equivalent S(6,8) atoms. In the ninth La site, La(9) is bonded in a 8-coordinate geometry to one S(2); one S(9,12); two equivalent S(10); two equivalent S(15); and two equivalent S(4,16) atoms. In the tenth La site, La(10) is bonded to one S(19), two equivalent S(11), two equivalent S(15), and two equivalent S(21) atoms to form distorted LaS7 pentagonal bipyramids that share corners with two equivalent Er(1)S6 octahedra, corners with two equivalent Er(8)S6 octahedra,  an edgeedge with one Er(1)S6 octahedra, edges with two equivalent Er(2)S6 octahedra, edges with two equivalent La(6)S7 pentagonal bipyramids, and faces with two equivalent La(10)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 22-68°. There are twenty-three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Er(1), one La(7), and two equivalent La(1) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(14)La2Er3 square pyramids; corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(23)La4Er square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid; corners with two equivalent S(22)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(14)La2Er3 square pyramid;  an edgeedge with one S(21)La3Er2 square pyramid;  an edgeedge with one S(23)La4Er square pyramid; edges with two equivalent S(17)La4Er square pyramids; edges with two equivalent S(1)La3Er2 trigonal bipyramids; and edges with two equivalent S(7)La3Er2 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Er(2), one La(9), and two equivalent La(5) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(5)La2Er3 square pyramids; corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(27)La4Er square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(5)La2Er3 square pyramid;  an edgeedge with one S(19)La3Er2 square pyramid;  an edgeedge with one S(27)La4Er square pyramid; edges with two equivalent S(15)La4Er square pyramids; edges with two equivalent S(10)La3Er2 trigonal bipyramids; and edges with two equivalent S(2)La3Er2 trigonal bipyramids. In the third S site, S(3,18) is bonded to three equivalent Er(5,6) and two equivalent La(8) atoms to form distorted SLa2Er3 square pyramids that share corners with two equivalent S(23)La4Er square pyramids; corners with two equivalent S(27)La4Er square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid; corners with two equivalent S(10)La3Er2 trigonal bipyramids; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(7)La3Er2 trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids; edges with four equivalent S(3,18)La2Er3 square pyramids;  an edgeedge with one S(7)La3Er2 trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; and  a faceface with one S(27)La4Er square pyramid. In the fourth S site, S(4,16) is bonded to one Er(3,7); two equivalent La(2); and two equivalent La(9) atoms to form distorted SLa4Er trigonal bipyramids that share corners with two equivalent S(15)La4Er square pyramids; corners with two equivalent S(10)La3Er2 trigonal bipyramids; corners with two equivalent S(2)La3Er2 trigonal bipyramids; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(11)La4Er trigonal bipyramids; corners with three equivalent S(6,8)La4Er trigonal bipyramids;  an edgeedge with one S(15)La4Er square pyramid;  an edgeedge with one S(10)La3Er2 trigonal bipyramid;  an edgeedge with one S(11)La4Er trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; and edges with two equivalent S(4,16)La4Er trigonal bipyramids. In the fifth S site, S(5) is bonded to one Er(8), two equivalent Er(4), and two equivalent La(5) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(14)La2Er3 square pyramids, corners with two equivalent S(27)La4Er square pyramids,  a cornercorner with one S(11)La4Er trigonal bipyramid, corners with two equivalent S(10)La3Er2 trigonal bipyramids, corners with two equivalent S(2)La3Er2 trigonal bipyramids,  an edgeedge with one S(14)La2Er3 square pyramid,  an edgeedge with one S(27)La4Er square pyramid, edges with two equivalent S(5)La2Er3 square pyramids,  an edgeedge with one S(2)La3Er2 trigonal bipyramid, and edges with two equivalent S(26)La3Er2 trigonal bipyramids. In the sixth S site, S(6,8) is bonded to one Er(3,7); two equivalent La(2); and two equivalent La(8) atoms to form distorted SLa4Er trigonal bipyramids that share corners with two equivalent S(3,18)La2Er3 square pyramids; corners with two equivalent S(27)La4Er square pyramids; corners with two equivalent S(11)La4Er trigonal bipyramids; corners with three equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(3,18)La2Er3 square pyramid;  an edgeedge with one S(27)La4Er square pyramid;  an edgeedge with one S(11)La4Er trigonal bipyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(26)La3Er2 trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the seventh S site, S(7) is bonded to two equivalent Er(5,6); one La(1); and two equivalent La(7) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(14)La2Er3 square pyramids; corners with two equivalent S(17)La4Er square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(22)La3Er2 trigonal bipyramid; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(3,18)La2Er3 square pyramid;  an edgeedge with one S(17)La4Er square pyramid; edges with two equivalent S(23)La4Er square pyramids;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(1)La3Er2 trigonal bipyramids; and edges with two equivalent S(7)La3Er2 trigonal bipyramids. In the eighth S site, S(9,12) is bonded to one Er(5,6); two equivalent Er(3,7); one La(7); and one La(8) atom to form distorted SLa2Er3 trigonal bipyramids that share  a cornercorner with one S(3,18)La2Er3 square pyramid;  a cornercorner with one S(23)La4Er square pyramid; corners with two equivalent S(17)La4Er square pyramids; corners with two equivalent S(27)La4Er square pyramids;  a cornercorner with one S(1)La3Er2 trigonal bipyramid;  a cornercorner with one S(26)La3Er2 trigonal bipyramid; corners with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(3,18)La2Er3 square pyramids; edges with two equivalent S(7)La3Er2 trigonal bipyramids; edges with two equivalent S(4,16)La4Er trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the ninth S site, S(10) is bonded to two equivalent Er(5,6); one La(5); and two equivalent La(9) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(5)La2Er3 square pyramids; corners with two equivalent S(15)La4Er square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(26)La3Er2 trigonal bipyramid; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(3,18)La2Er3 square pyramid;  an edgeedge with one S(15)La4Er square pyramid; edges with two equivalent S(27)La4Er square pyramids;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(10)La3Er2 trigonal bipyramids; and edges with two equivalent S(2)La3Er2 trigonal bipyramids. In the tenth S site, S(11) is bonded to one Er(8), two equivalent La(10), and two equivalent La(2) atoms to form distorted SLa4Er trigonal bipyramids that share  a cornercorner with one S(5)La2Er3 square pyramid; corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(15)La4Er square pyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids;  an edgeedge with one S(21)La3Er2 square pyramid;  an edgeedge with one S(15)La4Er square pyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(26)La3Er2 trigonal bipyramids; and edges with two equivalent S(11)La4Er trigonal bipyramids. In the eleventh S site, S(13) is bonded in a rectangular see-saw-like geometry to one Er(1), one Er(4), and two equivalent Er(8) atoms. In the twelfth S site, S(14) is bonded to one Er(9), two equivalent Er(4), and two equivalent La(1) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(5)La2Er3 square pyramids, corners with two equivalent S(23)La4Er square pyramids,  a cornercorner with one S(24)La4Er trigonal bipyramid, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(7)La3Er2 trigonal bipyramids,  an edgeedge with one S(5)La2Er3 square pyramid,  an edgeedge with one S(23)La4Er square pyramid, edges with two equivalent S(14)La2Er3 square pyramids,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, and edges with two equivalent S(22)La3Er2 trigonal bipyramids. In the thirteenth S site, S(15) is bonded to one Er(2), two equivalent La(10), and two equivalent La(9) atoms to form distorted SLa4Er square pyramids that share corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(9,12)La2Er3 trigonal bipyramids; corners with two equivalent S(10)La3Er2 trigonal bipyramids; corners with two equivalent S(11)La4Er trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(21)La3Er2 square pyramid; edges with two equivalent S(19)La3Er2 square pyramids; edges with two equivalent S(15)La4Er square pyramids;  an edgeedge with one S(10)La3Er2 trigonal bipyramid;  an edgeedge with one S(11)La4Er trigonal bipyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; and edges with two equivalent S(2)La3Er2 trigonal bipyramids. In the fourteenth S site, S(17) is bonded to one Er(1), two equivalent La(6), and two equivalent La(7) atoms to form distorted SLa4Er square pyramids that share corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(9,12)La2Er3 trigonal bipyramids; corners with two equivalent S(7)La3Er2 trigonal bipyramids; corners with two equivalent S(24)La4Er trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(19)La3Er2 square pyramid; edges with two equivalent S(21)La3Er2 square pyramids; edges with two equivalent S(17)La4Er square pyramids;  an edgeedge with one S(7)La3Er2 trigonal bipyramid;  an edgeedge with one S(24)La4Er trigonal bipyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; and edges with two equivalent S(1)La3Er2 trigonal bipyramids. In the fifteenth S site, S(19) is bonded to two equivalent Er(2), one La(10), and two equivalent La(6) atoms to form SLa3Er2 square pyramids that share corners with two equivalent S(17)La4Er square pyramids, corners with two equivalent S(2)La3Er2 trigonal bipyramids, corners with two equivalent S(11)La4Er trigonal bipyramids, corners with two equivalent S(24)La4Er trigonal bipyramids,  an edgeedge with one S(17)La4Er square pyramid, edges with two equivalent S(19)La3Er2 square pyramids, edges with two equivalent S(21)La3Er2 square pyramids, edges with two equivalent S(15)La4Er square pyramids,  an edgeedge with one S(2)La3Er2 trigonal bipyramid, and  an edgeedge with one S(24)La4Er trigonal bipyramid. In the sixteenth S site, S(20) is bonded in a rectangular see-saw-like geometry to one Er(2), one Er(4), and two equivalent Er(9) atoms. In the seventeenth S site, S(21) is bonded to two equivalent Er(1), one La(6), and two equivalent La(10) atoms to form SLa3Er2 square pyramids that share corners with two equivalent S(15)La4Er square pyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(11)La4Er trigonal bipyramids, corners with two equivalent S(24)La4Er trigonal bipyramids,  an edgeedge with one S(15)La4Er square pyramid, edges with two equivalent S(19)La3Er2 square pyramids, edges with two equivalent S(21)La3Er2 square pyramids, edges with two equivalent S(17)La4Er square pyramids,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, and  an edgeedge with one S(11)La4Er trigonal bipyramid. In the eighteenth S site, S(22) is bonded to two equivalent Er(9), one La(1), one La(3), and one La(4) atom to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid;  a cornercorner with one S(7)La3Er2 trigonal bipyramid; corners with two equivalent S(1)La3Er2 trigonal bipyramids; corners with two equivalent S(22)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; edges with two equivalent S(14)La2Er3 square pyramids; edges with two equivalent S(23)La4Er square pyramids; edges with two equivalent S(24)La4Er trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the nineteenth S site, S(23) is bonded to one Er(5,6); two equivalent La(1); and two equivalent La(3) atoms to form SLa4Er square pyramids that share corners with two equivalent S(14)La2Er3 square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids; corners with two equivalent S(1)La3Er2 trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids; corners with three equivalent S(9,12)La2Er3 trigonal bipyramids;  an edgeedge with one S(14)La2Er3 square pyramid; edges with two equivalent S(23)La4Er square pyramids;  an edgeedge with one S(1)La3Er2 trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(22)La3Er2 trigonal bipyramids; edges with two equivalent S(7)La3Er2 trigonal bipyramids; and  a faceface with one S(3,18)La2Er3 square pyramid. In the twentieth S site, S(24) is bonded to one Er(9), two equivalent La(4), and two equivalent La(6) atoms to form distorted SLa4Er trigonal bipyramids that share  a cornercorner with one S(14)La2Er3 square pyramid; corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(17)La4Er square pyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids;  an edgeedge with one S(19)La3Er2 square pyramid;  an edgeedge with one S(17)La4Er square pyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(22)La3Er2 trigonal bipyramids; and edges with two equivalent S(24)La4Er trigonal bipyramids. In the twenty-first S site, S(25) is bonded in a square co-planar geometry to four equivalent Er(3,7) atoms. In the twenty-second S site, S(26) is bonded to two equivalent Er(8), one La(2), one La(5), and one La(8) atom to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid;  a cornercorner with one S(10)La3Er2 trigonal bipyramid; corners with two equivalent S(2)La3Er2 trigonal bipyramids; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; edges with two equivalent S(5)La2Er3 square pyramids; edges with two equivalent S(27)La4Er square pyramids; edges with two equivalent S(11)La4Er trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the twenty-third S site, S(27) is bonded to one Er(5,6); two equivalent La(5); and two equivalent La(8) atoms to form SLa4Er square pyramids that share corners with two equivalent S(5)La2Er3 square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids; corners with two equivalent S(2)La3Er2 trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids; corners with three equivalent S(9,12)La2Er3 trigonal bipyramids;  an edgeedge with one S(5)La2Er3 square pyramid; edges with two equivalent S(27)La4Er square pyramids;  an edgeedge with one S(2)La3Er2 trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(10)La3Er2 trigonal bipyramids; edges with two equivalent S(26)La3Er2 trigonal bipyramids; and  a faceface with one S(3,18)La2Er3 square pyramid. is represented by the CIF file [CIF]
data_La10(ErS3)9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.005
_cell_length_b   15.005
_cell_length_c   21.814
_cell_angle_alpha   58.229
_cell_angle_beta   58.229
_cell_angle_gamma   15.101
_symmetry_Int_Tables_number   1
_cell_volume   1084.201
_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  0.874  0.874  0.709  1.0
  La  La1  1  0.959  0.959  0.193  1.0
  La  La2  1  0.885  0.885  0.892  1.0
  La  La3  1  0.041  0.041  0.807  1.0
  La  La4  1  0.126  0.126  0.291  1.0
  La  La5  1  0.182  0.182  0.603  1.0
  La  La6  1  0.201  0.201  0.780  1.0
  La  La7  1  0.115  0.115  0.108  1.0
  La  La8  1  0.799  0.799  0.220  1.0
  La  La9  1  0.818  0.818  0.397  1.0
  Er  Er10  1  0.822  0.822  0.576  1.0
  Er  Er11  1  0.178  0.178  0.424  1.0
  Er  Er12  1  0.427  0.427  0.029  1.0
  Er  Er13  1  0.002  0.002  0.500  1.0
  Er  Er14  1  0.249  0.249  0.913  1.0
  Er  Er15  1  0.751  0.751  0.087  1.0
  Er  Er16  1  0.573  0.573  0.971  1.0
  Er  Er17  1  0.475  0.475  0.360  1.0
  Er  Er18  1  0.525  0.525  0.640  1.0
  S  S19  1  0.323  0.323  0.659  1.0
  S  S20  1  0.677  0.677  0.341  1.0
  S  S21  1  0.700  0.700  0.015  1.0
  S  S22  1  0.395  0.395  0.168  1.0
  S  S23  1  0.549  0.549  0.398  1.0
  S  S24  1  0.543  0.543  0.114  1.0
  S  S25  1  0.755  0.755  0.820  1.0
  S  S26  1  0.457  0.457  0.886  1.0
  S  S27  1  0.142  0.142  0.947  1.0
  S  S28  1  0.245  0.245  0.180  1.0
  S  S29  1  0.407  0.407  0.314  1.0
  S  S30  1  0.858  0.858  0.053  1.0
  S  S31  1  0.926  0.926  0.463  1.0
  S  S32  1  0.451  0.451  0.602  1.0
  S  S33  1  0.286  0.286  0.331  1.0
  S  S34  1  0.605  0.605  0.832  1.0
  S  S35  1  0.714  0.714  0.669  1.0
  S  S36  1  0.300  0.300  0.985  1.0
  S  S37  1  0.702  0.702  0.493  1.0
  S  S38  1  0.077  0.077  0.537  1.0
  S  S39  1  0.298  0.298  0.507  1.0
  S  S40  1  0.975  0.975  0.735  1.0
  S  S41  1  0.357  0.357  0.815  1.0
  S  S42  1  0.593  0.593  0.686  1.0
  S  S43  1  0.000  0.000  0.000  1.0
  S  S44  1  0.025  0.025  0.265  1.0
  S  S45  1  0.643  0.643  0.185  1.0
[/CIF]
.
The crystal structure described by La10(ErS3)9 crystallizes in the monoclinic Cm space group. There are seven inequivalent Er sites. In the first Er site, Er(1) is bonded to one S(13), one S(17), two equivalent S(1), and two equivalent S(21) atoms to form ErS6 octahedra that share  a cornercorner with one Er(4)S6 octahedra, corners with two equivalent Er(8)S6 octahedra, corners with two equivalent La(10)S7 pentagonal bipyramids, edges with two equivalent Er(1)S6 octahedra,  an edgeedge with one La(10)S7 pentagonal bipyramid, and edges with two equivalent La(6)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 54-63°. In the second Er site, Er(2) is bonded to one S(15), one S(20), two equivalent S(19), and two equivalent S(2) atoms to form ErS6 octahedra that share  a cornercorner with one Er(4)S6 octahedra, corners with two equivalent Er(9)S6 octahedra, corners with two equivalent La(6)S7 pentagonal bipyramids, edges with two equivalent Er(2)S6 octahedra,  an edgeedge with one La(6)S7 pentagonal bipyramid, and edges with two equivalent La(10)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 52-65°. In the third Er site, Er(3,7) is bonded to one S(4,16); one S(6,8); two equivalent S(25); and two equivalent S(9,12) atoms to form ErS6 octahedra that share corners with two equivalent Er(3,7)S6 octahedra; corners with two equivalent Er(5,6)S7 pentagonal bipyramids; and edges with three equivalent Er(3,7)S6 octahedra. The corner-sharing octahedra are not tilted. In the fourth Er site, Er(4) is bonded to one S(13), one S(20), two equivalent S(14), and two equivalent S(5) atoms to form a mixture of corner and edge-sharing ErS6 octahedra. The corner-sharing octahedral tilt angles range from 63-65°. In the fifth Er site, Er(5,6) is bonded to one S(23); one S(9,12); two equivalent S(7); and three equivalent S(3,18) atoms to form distorted ErS7 pentagonal bipyramids that share corners with two equivalent Er(3,7)S6 octahedra and edges with four equivalent Er(5,6)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 47°. In the sixth Er site, Er(8) is bonded to one S(11), one S(5), two equivalent S(13), and two equivalent S(26) atoms to form ErS6 octahedra that share corners with two equivalent Er(1)S6 octahedra, corners with two equivalent La(10)S7 pentagonal bipyramids, edges with two equivalent Er(4)S6 octahedra, and edges with two equivalent Er(8)S6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the seventh Er site, Er(9) is bonded to one S(14), one S(24), two equivalent S(20), and two equivalent S(22) atoms to form ErS6 octahedra that share corners with two equivalent Er(2)S6 octahedra, corners with two equivalent La(6)S7 pentagonal bipyramids, edges with two equivalent Er(4)S6 octahedra, and edges with two equivalent Er(9)S6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are ten inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one S(22), one S(7), two equivalent S(1), two equivalent S(14), and two equivalent S(23) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to one S(26); two equivalent S(11); two equivalent S(4,16); and two equivalent S(6,8) atoms. In the third La site, La(3) is bonded in a 8-coordinate geometry to one S(22); one S(9,12); two equivalent S(23); two equivalent S(3,18); and two equivalent S(6,8) atoms. In the fourth La site, La(4) is bonded in a 7-coordinate geometry to one S(22); two equivalent S(24); two equivalent S(4,16); and two equivalent S(6,8) atoms. In the fifth La site, La(5) is bonded in a 8-coordinate geometry to one S(10), one S(26), two equivalent S(2), two equivalent S(27), and two equivalent S(5) atoms. In the sixth La site, La(6) is bonded to one S(21), two equivalent S(17), two equivalent S(19), and two equivalent S(24) atoms to form distorted LaS7 pentagonal bipyramids that share corners with two equivalent Er(2)S6 octahedra, corners with two equivalent Er(9)S6 octahedra,  an edgeedge with one Er(2)S6 octahedra, edges with two equivalent Er(1)S6 octahedra, edges with two equivalent La(10)S7 pentagonal bipyramids, and faces with two equivalent La(6)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 22-68°. In the seventh La site, La(7) is bonded in a 8-coordinate geometry to one S(1); one S(9,12); two equivalent S(17); two equivalent S(4,16); and two equivalent S(7) atoms. In the eighth La site, La(8) is bonded in a 8-coordinate geometry to one S(26); one S(9,12); two equivalent S(27); two equivalent S(3,18); and two equivalent S(6,8) atoms. In the ninth La site, La(9) is bonded in a 8-coordinate geometry to one S(2); one S(9,12); two equivalent S(10); two equivalent S(15); and two equivalent S(4,16) atoms. In the tenth La site, La(10) is bonded to one S(19), two equivalent S(11), two equivalent S(15), and two equivalent S(21) atoms to form distorted LaS7 pentagonal bipyramids that share corners with two equivalent Er(1)S6 octahedra, corners with two equivalent Er(8)S6 octahedra,  an edgeedge with one Er(1)S6 octahedra, edges with two equivalent Er(2)S6 octahedra, edges with two equivalent La(6)S7 pentagonal bipyramids, and faces with two equivalent La(10)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 22-68°. There are twenty-three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Er(1), one La(7), and two equivalent La(1) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(14)La2Er3 square pyramids; corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(23)La4Er square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid; corners with two equivalent S(22)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(14)La2Er3 square pyramid;  an edgeedge with one S(21)La3Er2 square pyramid;  an edgeedge with one S(23)La4Er square pyramid; edges with two equivalent S(17)La4Er square pyramids; edges with two equivalent S(1)La3Er2 trigonal bipyramids; and edges with two equivalent S(7)La3Er2 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Er(2), one La(9), and two equivalent La(5) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(5)La2Er3 square pyramids; corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(27)La4Er square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(5)La2Er3 square pyramid;  an edgeedge with one S(19)La3Er2 square pyramid;  an edgeedge with one S(27)La4Er square pyramid; edges with two equivalent S(15)La4Er square pyramids; edges with two equivalent S(10)La3Er2 trigonal bipyramids; and edges with two equivalent S(2)La3Er2 trigonal bipyramids. In the third S site, S(3,18) is bonded to three equivalent Er(5,6) and two equivalent La(8) atoms to form distorted SLa2Er3 square pyramids that share corners with two equivalent S(23)La4Er square pyramids; corners with two equivalent S(27)La4Er square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid; corners with two equivalent S(10)La3Er2 trigonal bipyramids; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(7)La3Er2 trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids; edges with four equivalent S(3,18)La2Er3 square pyramids;  an edgeedge with one S(7)La3Er2 trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; and  a faceface with one S(27)La4Er square pyramid. In the fourth S site, S(4,16) is bonded to one Er(3,7); two equivalent La(2); and two equivalent La(9) atoms to form distorted SLa4Er trigonal bipyramids that share corners with two equivalent S(15)La4Er square pyramids; corners with two equivalent S(10)La3Er2 trigonal bipyramids; corners with two equivalent S(2)La3Er2 trigonal bipyramids; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(11)La4Er trigonal bipyramids; corners with three equivalent S(6,8)La4Er trigonal bipyramids;  an edgeedge with one S(15)La4Er square pyramid;  an edgeedge with one S(10)La3Er2 trigonal bipyramid;  an edgeedge with one S(11)La4Er trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; and edges with two equivalent S(4,16)La4Er trigonal bipyramids. In the fifth S site, S(5) is bonded to one Er(8), two equivalent Er(4), and two equivalent La(5) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(14)La2Er3 square pyramids, corners with two equivalent S(27)La4Er square pyramids,  a cornercorner with one S(11)La4Er trigonal bipyramid, corners with two equivalent S(10)La3Er2 trigonal bipyramids, corners with two equivalent S(2)La3Er2 trigonal bipyramids,  an edgeedge with one S(14)La2Er3 square pyramid,  an edgeedge with one S(27)La4Er square pyramid, edges with two equivalent S(5)La2Er3 square pyramids,  an edgeedge with one S(2)La3Er2 trigonal bipyramid, and edges with two equivalent S(26)La3Er2 trigonal bipyramids. In the sixth S site, S(6,8) is bonded to one Er(3,7); two equivalent La(2); and two equivalent La(8) atoms to form distorted SLa4Er trigonal bipyramids that share corners with two equivalent S(3,18)La2Er3 square pyramids; corners with two equivalent S(27)La4Er square pyramids; corners with two equivalent S(11)La4Er trigonal bipyramids; corners with three equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(3,18)La2Er3 square pyramid;  an edgeedge with one S(27)La4Er square pyramid;  an edgeedge with one S(11)La4Er trigonal bipyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(26)La3Er2 trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the seventh S site, S(7) is bonded to two equivalent Er(5,6); one La(1); and two equivalent La(7) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(14)La2Er3 square pyramids; corners with two equivalent S(17)La4Er square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(22)La3Er2 trigonal bipyramid; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(3,18)La2Er3 square pyramid;  an edgeedge with one S(17)La4Er square pyramid; edges with two equivalent S(23)La4Er square pyramids;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(1)La3Er2 trigonal bipyramids; and edges with two equivalent S(7)La3Er2 trigonal bipyramids. In the eighth S site, S(9,12) is bonded to one Er(5,6); two equivalent Er(3,7); one La(7); and one La(8) atom to form distorted SLa2Er3 trigonal bipyramids that share  a cornercorner with one S(3,18)La2Er3 square pyramid;  a cornercorner with one S(23)La4Er square pyramid; corners with two equivalent S(17)La4Er square pyramids; corners with two equivalent S(27)La4Er square pyramids;  a cornercorner with one S(1)La3Er2 trigonal bipyramid;  a cornercorner with one S(26)La3Er2 trigonal bipyramid; corners with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(3,18)La2Er3 square pyramids; edges with two equivalent S(7)La3Er2 trigonal bipyramids; edges with two equivalent S(4,16)La4Er trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the ninth S site, S(10) is bonded to two equivalent Er(5,6); one La(5); and two equivalent La(9) atoms to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(5)La2Er3 square pyramids; corners with two equivalent S(15)La4Er square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(26)La3Er2 trigonal bipyramid; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(3,18)La2Er3 square pyramid;  an edgeedge with one S(15)La4Er square pyramid; edges with two equivalent S(27)La4Er square pyramids;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; edges with two equivalent S(9,12)La2Er3 trigonal bipyramids; edges with two equivalent S(10)La3Er2 trigonal bipyramids; and edges with two equivalent S(2)La3Er2 trigonal bipyramids. In the tenth S site, S(11) is bonded to one Er(8), two equivalent La(10), and two equivalent La(2) atoms to form distorted SLa4Er trigonal bipyramids that share  a cornercorner with one S(5)La2Er3 square pyramid; corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(15)La4Er square pyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids;  an edgeedge with one S(21)La3Er2 square pyramid;  an edgeedge with one S(15)La4Er square pyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(26)La3Er2 trigonal bipyramids; and edges with two equivalent S(11)La4Er trigonal bipyramids. In the eleventh S site, S(13) is bonded in a rectangular see-saw-like geometry to one Er(1), one Er(4), and two equivalent Er(8) atoms. In the twelfth S site, S(14) is bonded to one Er(9), two equivalent Er(4), and two equivalent La(1) atoms to form SLa2Er3 square pyramids that share corners with two equivalent S(5)La2Er3 square pyramids, corners with two equivalent S(23)La4Er square pyramids,  a cornercorner with one S(24)La4Er trigonal bipyramid, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(7)La3Er2 trigonal bipyramids,  an edgeedge with one S(5)La2Er3 square pyramid,  an edgeedge with one S(23)La4Er square pyramid, edges with two equivalent S(14)La2Er3 square pyramids,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, and edges with two equivalent S(22)La3Er2 trigonal bipyramids. In the thirteenth S site, S(15) is bonded to one Er(2), two equivalent La(10), and two equivalent La(9) atoms to form distorted SLa4Er square pyramids that share corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(9,12)La2Er3 trigonal bipyramids; corners with two equivalent S(10)La3Er2 trigonal bipyramids; corners with two equivalent S(11)La4Er trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(21)La3Er2 square pyramid; edges with two equivalent S(19)La3Er2 square pyramids; edges with two equivalent S(15)La4Er square pyramids;  an edgeedge with one S(10)La3Er2 trigonal bipyramid;  an edgeedge with one S(11)La4Er trigonal bipyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; and edges with two equivalent S(2)La3Er2 trigonal bipyramids. In the fourteenth S site, S(17) is bonded to one Er(1), two equivalent La(6), and two equivalent La(7) atoms to form distorted SLa4Er square pyramids that share corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(9,12)La2Er3 trigonal bipyramids; corners with two equivalent S(7)La3Er2 trigonal bipyramids; corners with two equivalent S(24)La4Er trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids;  an edgeedge with one S(19)La3Er2 square pyramid; edges with two equivalent S(21)La3Er2 square pyramids; edges with two equivalent S(17)La4Er square pyramids;  an edgeedge with one S(7)La3Er2 trigonal bipyramid;  an edgeedge with one S(24)La4Er trigonal bipyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid; and edges with two equivalent S(1)La3Er2 trigonal bipyramids. In the fifteenth S site, S(19) is bonded to two equivalent Er(2), one La(10), and two equivalent La(6) atoms to form SLa3Er2 square pyramids that share corners with two equivalent S(17)La4Er square pyramids, corners with two equivalent S(2)La3Er2 trigonal bipyramids, corners with two equivalent S(11)La4Er trigonal bipyramids, corners with two equivalent S(24)La4Er trigonal bipyramids,  an edgeedge with one S(17)La4Er square pyramid, edges with two equivalent S(19)La3Er2 square pyramids, edges with two equivalent S(21)La3Er2 square pyramids, edges with two equivalent S(15)La4Er square pyramids,  an edgeedge with one S(2)La3Er2 trigonal bipyramid, and  an edgeedge with one S(24)La4Er trigonal bipyramid. In the sixteenth S site, S(20) is bonded in a rectangular see-saw-like geometry to one Er(2), one Er(4), and two equivalent Er(9) atoms. In the seventeenth S site, S(21) is bonded to two equivalent Er(1), one La(6), and two equivalent La(10) atoms to form SLa3Er2 square pyramids that share corners with two equivalent S(15)La4Er square pyramids, corners with two equivalent S(1)La3Er2 trigonal bipyramids, corners with two equivalent S(11)La4Er trigonal bipyramids, corners with two equivalent S(24)La4Er trigonal bipyramids,  an edgeedge with one S(15)La4Er square pyramid, edges with two equivalent S(19)La3Er2 square pyramids, edges with two equivalent S(21)La3Er2 square pyramids, edges with two equivalent S(17)La4Er square pyramids,  an edgeedge with one S(1)La3Er2 trigonal bipyramid, and  an edgeedge with one S(11)La4Er trigonal bipyramid. In the eighteenth S site, S(22) is bonded to two equivalent Er(9), one La(1), one La(3), and one La(4) atom to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid;  a cornercorner with one S(7)La3Er2 trigonal bipyramid; corners with two equivalent S(1)La3Er2 trigonal bipyramids; corners with two equivalent S(22)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; edges with two equivalent S(14)La2Er3 square pyramids; edges with two equivalent S(23)La4Er square pyramids; edges with two equivalent S(24)La4Er trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the nineteenth S site, S(23) is bonded to one Er(5,6); two equivalent La(1); and two equivalent La(3) atoms to form SLa4Er square pyramids that share corners with two equivalent S(14)La2Er3 square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids; corners with two equivalent S(1)La3Er2 trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids; corners with three equivalent S(9,12)La2Er3 trigonal bipyramids;  an edgeedge with one S(14)La2Er3 square pyramid; edges with two equivalent S(23)La4Er square pyramids;  an edgeedge with one S(1)La3Er2 trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(22)La3Er2 trigonal bipyramids; edges with two equivalent S(7)La3Er2 trigonal bipyramids; and  a faceface with one S(3,18)La2Er3 square pyramid. In the twentieth S site, S(24) is bonded to one Er(9), two equivalent La(4), and two equivalent La(6) atoms to form distorted SLa4Er trigonal bipyramids that share  a cornercorner with one S(14)La2Er3 square pyramid; corners with two equivalent S(19)La3Er2 square pyramids; corners with two equivalent S(21)La3Er2 square pyramids; corners with two equivalent S(17)La4Er square pyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids;  an edgeedge with one S(19)La3Er2 square pyramid;  an edgeedge with one S(17)La4Er square pyramid;  an edgeedge with one S(4,16)La4Er trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(22)La3Er2 trigonal bipyramids; and edges with two equivalent S(24)La4Er trigonal bipyramids. In the twenty-first S site, S(25) is bonded in a square co-planar geometry to four equivalent Er(3,7) atoms. In the twenty-second S site, S(26) is bonded to two equivalent Er(8), one La(2), one La(5), and one La(8) atom to form distorted SLa3Er2 trigonal bipyramids that share corners with two equivalent S(3,18)La2Er3 square pyramids;  a cornercorner with one S(9,12)La2Er3 trigonal bipyramid;  a cornercorner with one S(10)La3Er2 trigonal bipyramid; corners with two equivalent S(2)La3Er2 trigonal bipyramids; corners with two equivalent S(26)La3Er2 trigonal bipyramids; corners with two equivalent S(4,16)La4Er trigonal bipyramids; edges with two equivalent S(5)La2Er3 square pyramids; edges with two equivalent S(27)La4Er square pyramids; edges with two equivalent S(11)La4Er trigonal bipyramids; and edges with two equivalent S(6,8)La4Er trigonal bipyramids. In the twenty-third S site, S(27) is bonded to one Er(5,6); two equivalent La(5); and two equivalent La(8) atoms to form SLa4Er square pyramids that share corners with two equivalent S(5)La2Er3 square pyramids; corners with four equivalent S(3,18)La2Er3 square pyramids; corners with two equivalent S(2)La3Er2 trigonal bipyramids; corners with two equivalent S(6,8)La4Er trigonal bipyramids; corners with three equivalent S(9,12)La2Er3 trigonal bipyramids;  an edgeedge with one S(5)La2Er3 square pyramid; edges with two equivalent S(27)La4Er square pyramids;  an edgeedge with one S(2)La3Er2 trigonal bipyramid;  an edgeedge with one S(6,8)La4Er trigonal bipyramid; edges with two equivalent S(10)La3Er2 trigonal bipyramids; edges with two equivalent S(26)La3Er2 trigonal bipyramids; and  a faceface with one S(3,18)La2Er3 square pyramid. is represented by the CIF file [CIF]
data_La10(ErS3)9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.005
_cell_length_b   15.005
_cell_length_c   21.814
_cell_angle_alpha   58.229
_cell_angle_beta   58.229
_cell_angle_gamma   15.101
_symmetry_Int_Tables_number   1
_cell_volume   1084.201
_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  0.874  0.874  0.709  1.0
  La  La1  1  0.959  0.959  0.193  1.0
  La  La2  1  0.885  0.885  0.892  1.0
  La  La3  1  0.041  0.041  0.807  1.0
  La  La4  1  0.126  0.126  0.291  1.0
  La  La5  1  0.182  0.182  0.603  1.0
  La  La6  1  0.201  0.201  0.780  1.0
  La  La7  1  0.115  0.115  0.108  1.0
  La  La8  1  0.799  0.799  0.220  1.0
  La  La9  1  0.818  0.818  0.397  1.0
  Er  Er10  1  0.822  0.822  0.576  1.0
  Er  Er11  1  0.178  0.178  0.424  1.0
  Er  Er12  1  0.427  0.427  0.029  1.0
  Er  Er13  1  0.002  0.002  0.500  1.0
  Er  Er14  1  0.249  0.249  0.913  1.0
  Er  Er15  1  0.751  0.751  0.087  1.0
  Er  Er16  1  0.573  0.573  0.971  1.0
  Er  Er17  1  0.475  0.475  0.360  1.0
  Er  Er18  1  0.525  0.525  0.640  1.0
  S  S19  1  0.323  0.323  0.659  1.0
  S  S20  1  0.677  0.677  0.341  1.0
  S  S21  1  0.700  0.700  0.015  1.0
  S  S22  1  0.395  0.395  0.168  1.0
  S  S23  1  0.549  0.549  0.398  1.0
  S  S24  1  0.543  0.543  0.114  1.0
  S  S25  1  0.755  0.755  0.820  1.0
  S  S26  1  0.457  0.457  0.886  1.0
  S  S27  1  0.142  0.142  0.947  1.0
  S  S28  1  0.245  0.245  0.180  1.0
  S  S29  1  0.407  0.407  0.314  1.0
  S  S30  1  0.858  0.858  0.053  1.0
  S  S31  1  0.926  0.926  0.463  1.0
  S  S32  1  0.451  0.451  0.602  1.0
  S  S33  1  0.286  0.286  0.331  1.0
  S  S34  1  0.605  0.605  0.832  1.0
  S  S35  1  0.714  0.714  0.669  1.0
  S  S36  1  0.300  0.300  0.985  1.0
  S  S37  1  0.702  0.702  0.493  1.0
  S  S38  1  0.077  0.077  0.537  1.0
  S  S39  1  0.298  0.298  0.507  1.0
  S  S40  1  0.975  0.975  0.735  1.0
  S  S41  1  0.357  0.357  0.815  1.0
  S  S42  1  0.593  0.593  0.686  1.0
  S  S43  1  0.000  0.000  0.000  1.0
  S  S44  1  0.025  0.025  0.265  1.0
  S  S45  1  0.643  0.643  0.185  1.0
[/CIF]
.