The structure described by LiEu2SmO4 crystallizes in the orthorhombic Pnma space group. Li(1) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form LiO4 tetrahedra that share  a cornercorner with one Sm(1)O6 octahedra, corners with two equivalent Li(1)O4 tetrahedra, edges with two equivalent Sm(1)O6 octahedra, and edges with two equivalent Eu(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 2°. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to one O(4), two equivalent O(1), and three equivalent O(2) atoms. In the second Eu site, Eu(2) is bonded to two equivalent O(1), two equivalent O(4), and three equivalent O(3) atoms to form distorted EuO7 pentagonal bipyramids that share corners with four equivalent Sm(1)O6 octahedra, edges with four equivalent Sm(1)O6 octahedra, edges with two equivalent Eu(2)O7 pentagonal bipyramids, edges with two equivalent Li(1)O4 tetrahedra, and faces with two equivalent Eu(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 13-17°. Sm(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form SmO6 octahedra that share corners with four equivalent Eu(2)O7 pentagonal bipyramids,  a cornercorner with one Li(1)O4 tetrahedra, edges with two equivalent Sm(1)O6 octahedra, edges with four equivalent Eu(2)O7 pentagonal bipyramids, and edges with two equivalent Li(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), two equivalent Eu(1), two equivalent Eu(2), and one Sm(1) atom to form distorted OLiSmEu4 octahedra that share corners with two equivalent O(3)Sm2Eu3 square pyramids, edges with two equivalent O(1)LiSmEu4 octahedra, and edges with three equivalent O(3)Sm2Eu3 square pyramids. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Li(1), three equivalent Eu(1), and one Sm(1) atom. In the third O site, O(3) is bonded to three equivalent Eu(2) and two equivalent Sm(1) atoms to form distorted OSm2Eu3 square pyramids that share corners with two equivalent O(1)LiSmEu4 octahedra, edges with three equivalent O(1)LiSmEu4 octahedra, and edges with four equivalent O(3)Sm2Eu3 square pyramids. The corner-sharing octahedral tilt angles are 19°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Li(1), one Eu(1), two equivalent Eu(2), and two equivalent Sm(1) atoms. is represented by the CIF file [CIF]
data_LiSmEu2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.498
_cell_length_b   11.595
_cell_length_c   11.698
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   474.470
_cell_formula_units_Z   4
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
  Li  Li0  1  0.250  0.347  0.910  1.0
  Li  Li1  1  0.250  0.847  0.590  1.0
  Li  Li2  1  0.750  0.653  0.090  1.0
  Li  Li3  1  0.750  0.153  0.410  1.0
  Sm  Sm4  1  0.250  0.140  0.204  1.0
  Sm  Sm5  1  0.250  0.640  0.296  1.0
  Sm  Sm6  1  0.750  0.860  0.796  1.0
  Sm  Sm7  1  0.750  0.360  0.704  1.0
  Eu  Eu8  1  0.250  0.098  0.614  1.0
  Eu  Eu9  1  0.250  0.598  0.886  1.0
  Eu  Eu10  1  0.750  0.902  0.386  1.0
  Eu  Eu11  1  0.750  0.402  0.114  1.0
  Eu  Eu12  1  0.250  0.365  0.425  1.0
  Eu  Eu13  1  0.250  0.865  0.075  1.0
  Eu  Eu14  1  0.750  0.635  0.575  1.0
  Eu  Eu15  1  0.750  0.135  0.925  1.0
  O  O16  1  0.250  0.257  0.043  1.0
  O  O17  1  0.250  0.757  0.457  1.0
  O  O18  1  0.750  0.743  0.957  1.0
  O  O19  1  0.750  0.243  0.543  1.0
  O  O20  1  0.250  0.060  0.392  1.0
  O  O21  1  0.250  0.560  0.108  1.0
  O  O22  1  0.750  0.940  0.608  1.0
  O  O23  1  0.750  0.440  0.892  1.0
  O  O24  1  0.250  0.475  0.627  1.0
  O  O25  1  0.250  0.975  0.873  1.0
  O  O26  1  0.750  0.525  0.373  1.0
  O  O27  1  0.750  0.025  0.127  1.0
  O  O28  1  0.250  0.240  0.780  1.0
  O  O29  1  0.250  0.740  0.720  1.0
  O  O30  1  0.750  0.760  0.220  1.0
  O  O31  1  0.750  0.260  0.280  1.0
[/CIF]
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The structure described by LiEu2SmO4 crystallizes in the orthorhombic Pnma space group. Li(1) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form LiO4 tetrahedra that share  a cornercorner with one Sm(1)O6 octahedra, corners with two equivalent Li(1)O4 tetrahedra, edges with two equivalent Sm(1)O6 octahedra, and edges with two equivalent Eu(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 2°. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 6-coordinate geometry to one O(4), two equivalent O(1), and three equivalent O(2) atoms. In the second Eu site, Eu(2) is bonded to two equivalent O(1), two equivalent O(4), and three equivalent O(3) atoms to form distorted EuO7 pentagonal bipyramids that share corners with four equivalent Sm(1)O6 octahedra, edges with four equivalent Sm(1)O6 octahedra, edges with two equivalent Eu(2)O7 pentagonal bipyramids, edges with two equivalent Li(1)O4 tetrahedra, and faces with two equivalent Eu(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 13-17°. Sm(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form SmO6 octahedra that share corners with four equivalent Eu(2)O7 pentagonal bipyramids,  a cornercorner with one Li(1)O4 tetrahedra, edges with two equivalent Sm(1)O6 octahedra, edges with four equivalent Eu(2)O7 pentagonal bipyramids, and edges with two equivalent Li(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), two equivalent Eu(1), two equivalent Eu(2), and one Sm(1) atom to form distorted OLiSmEu4 octahedra that share corners with two equivalent O(3)Sm2Eu3 square pyramids, edges with two equivalent O(1)LiSmEu4 octahedra, and edges with three equivalent O(3)Sm2Eu3 square pyramids. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Li(1), three equivalent Eu(1), and one Sm(1) atom. In the third O site, O(3) is bonded to three equivalent Eu(2) and two equivalent Sm(1) atoms to form distorted OSm2Eu3 square pyramids that share corners with two equivalent O(1)LiSmEu4 octahedra, edges with three equivalent O(1)LiSmEu4 octahedra, and edges with four equivalent O(3)Sm2Eu3 square pyramids. The corner-sharing octahedral tilt angles are 19°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Li(1), one Eu(1), two equivalent Eu(2), and two equivalent Sm(1) atoms. is represented by the CIF file [CIF]
data_LiSmEu2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.498
_cell_length_b   11.595
_cell_length_c   11.698
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   474.470
_cell_formula_units_Z   4
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
  Li  Li0  1  0.250  0.347  0.910  1.0
  Li  Li1  1  0.250  0.847  0.590  1.0
  Li  Li2  1  0.750  0.653  0.090  1.0
  Li  Li3  1  0.750  0.153  0.410  1.0
  Sm  Sm4  1  0.250  0.140  0.204  1.0
  Sm  Sm5  1  0.250  0.640  0.296  1.0
  Sm  Sm6  1  0.750  0.860  0.796  1.0
  Sm  Sm7  1  0.750  0.360  0.704  1.0
  Eu  Eu8  1  0.250  0.098  0.614  1.0
  Eu  Eu9  1  0.250  0.598  0.886  1.0
  Eu  Eu10  1  0.750  0.902  0.386  1.0
  Eu  Eu11  1  0.750  0.402  0.114  1.0
  Eu  Eu12  1  0.250  0.365  0.425  1.0
  Eu  Eu13  1  0.250  0.865  0.075  1.0
  Eu  Eu14  1  0.750  0.635  0.575  1.0
  Eu  Eu15  1  0.750  0.135  0.925  1.0
  O  O16  1  0.250  0.257  0.043  1.0
  O  O17  1  0.250  0.757  0.457  1.0
  O  O18  1  0.750  0.743  0.957  1.0
  O  O19  1  0.750  0.243  0.543  1.0
  O  O20  1  0.250  0.060  0.392  1.0
  O  O21  1  0.250  0.560  0.108  1.0
  O  O22  1  0.750  0.940  0.608  1.0
  O  O23  1  0.750  0.440  0.892  1.0
  O  O24  1  0.250  0.475  0.627  1.0
  O  O25  1  0.250  0.975  0.873  1.0
  O  O26  1  0.750  0.525  0.373  1.0
  O  O27  1  0.750  0.025  0.127  1.0
  O  O28  1  0.250  0.240  0.780  1.0
  O  O29  1  0.250  0.740  0.720  1.0
  O  O30  1  0.750  0.760  0.220  1.0
  O  O31  1  0.750  0.260  0.280  1.0
[/CIF]
.