The structure described by Cs3Sm2N9 crystallizes in the trigonal R-3c space group. Cs(1) is bonded to four equivalent N(1) and eight equivalent N(2) atoms to form distorted CsN12 cuboctahedra that share corners with six equivalent Cs(1)N12 cuboctahedra, corners with four equivalent Sm(1)N6 pentagonal pyramids, faces with eight equivalent Cs(1)N12 cuboctahedra, and faces with four equivalent Sm(1)N6 pentagonal pyramids. Sm(1) is bonded to three equivalent N(1) and three equivalent N(2) atoms to form distorted SmN6 pentagonal pyramids that share corners with six equivalent Cs(1)N12 cuboctahedra, faces with six equivalent Cs(1)N12 cuboctahedra, and  a faceface with one Sm(1)N6 pentagonal pyramid. There are two inequivalent N sites. In the first N site, N(2) is bonded in a 1-coordinate geometry to four equivalent Cs(1) and one Sm(1) atom. In the second N site, N(1) is bonded in a distorted L-shaped geometry to four equivalent Cs(1) and two equivalent Sm(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs3Sm2N9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.961
_cell_length_b   8.961
_cell_length_c   8.961
_cell_angle_alpha   90.786
_cell_angle_beta   90.786
_cell_angle_gamma   90.786
_symmetry_Int_Tables_number   1
_cell_volume   719.442
_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
  Cs  Cs0  1  0.919  0.581  0.250  1.0
  Cs  Cs1  1  0.250  0.919  0.581  1.0
  Cs  Cs2  1  0.581  0.250  0.919  1.0
  Cs  Cs3  1  0.750  0.081  0.419  1.0
  Cs  Cs4  1  0.419  0.750  0.081  1.0
  Cs  Cs5  1  0.081  0.419  0.750  1.0
  Sm  Sm6  1  0.361  0.361  0.361  1.0
  Sm  Sm7  1  0.861  0.861  0.861  1.0
  Sm  Sm8  1  0.639  0.639  0.639  1.0
  Sm  Sm9  1  0.139  0.139  0.139  1.0
  N  N10  1  0.381  0.119  0.250  1.0
  N  N11  1  0.250  0.381  0.119  1.0
  N  N12  1  0.119  0.250  0.381  1.0
  N  N13  1  0.750  0.619  0.881  1.0
  N  N14  1  0.881  0.750  0.619  1.0
  N  N15  1  0.619  0.881  0.750  1.0
  N  N16  1  0.742  0.925  0.092  1.0
  N  N17  1  0.092  0.742  0.925  1.0
  N  N18  1  0.925  0.092  0.742  1.0
  N  N19  1  0.592  0.425  0.242  1.0
  N  N20  1  0.242  0.592  0.425  1.0
  N  N21  1  0.425  0.242  0.592  1.0
  N  N22  1  0.258  0.075  0.908  1.0
  N  N23  1  0.908  0.258  0.075  1.0
  N  N24  1  0.075  0.908  0.258  1.0
  N  N25  1  0.408  0.575  0.758  1.0
  N  N26  1  0.758  0.408  0.575  1.0
  N  N27  1  0.575  0.758  0.408  1.0
[/CIF]
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The structure described by Cs3Sm2N9 crystallizes in the trigonal R-3c space group. Cs(1) is bonded to four equivalent N(1) and eight equivalent N(2) atoms to form distorted CsN12 cuboctahedra that share corners with six equivalent Cs(1)N12 cuboctahedra, corners with four equivalent Sm(1)N6 pentagonal pyramids, faces with eight equivalent Cs(1)N12 cuboctahedra, and faces with four equivalent Sm(1)N6 pentagonal pyramids. Sm(1) is bonded to three equivalent N(1) and three equivalent N(2) atoms to form distorted SmN6 pentagonal pyramids that share corners with six equivalent Cs(1)N12 cuboctahedra, faces with six equivalent Cs(1)N12 cuboctahedra, and  a faceface with one Sm(1)N6 pentagonal pyramid. There are two inequivalent N sites. In the first N site, N(2) is bonded in a 1-coordinate geometry to four equivalent Cs(1) and one Sm(1) atom. In the second N site, N(1) is bonded in a distorted L-shaped geometry to four equivalent Cs(1) and two equivalent Sm(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs3Sm2N9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.961
_cell_length_b   8.961
_cell_length_c   8.961
_cell_angle_alpha   90.786
_cell_angle_beta   90.786
_cell_angle_gamma   90.786
_symmetry_Int_Tables_number   1
_cell_volume   719.442
_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
  Cs  Cs0  1  0.919  0.581  0.250  1.0
  Cs  Cs1  1  0.250  0.919  0.581  1.0
  Cs  Cs2  1  0.581  0.250  0.919  1.0
  Cs  Cs3  1  0.750  0.081  0.419  1.0
  Cs  Cs4  1  0.419  0.750  0.081  1.0
  Cs  Cs5  1  0.081  0.419  0.750  1.0
  Sm  Sm6  1  0.361  0.361  0.361  1.0
  Sm  Sm7  1  0.861  0.861  0.861  1.0
  Sm  Sm8  1  0.639  0.639  0.639  1.0
  Sm  Sm9  1  0.139  0.139  0.139  1.0
  N  N10  1  0.381  0.119  0.250  1.0
  N  N11  1  0.250  0.381  0.119  1.0
  N  N12  1  0.119  0.250  0.381  1.0
  N  N13  1  0.750  0.619  0.881  1.0
  N  N14  1  0.881  0.750  0.619  1.0
  N  N15  1  0.619  0.881  0.750  1.0
  N  N16  1  0.742  0.925  0.092  1.0
  N  N17  1  0.092  0.742  0.925  1.0
  N  N18  1  0.925  0.092  0.742  1.0
  N  N19  1  0.592  0.425  0.242  1.0
  N  N20  1  0.242  0.592  0.425  1.0
  N  N21  1  0.425  0.242  0.592  1.0
  N  N22  1  0.258  0.075  0.908  1.0
  N  N23  1  0.908  0.258  0.075  1.0
  N  N24  1  0.075  0.908  0.258  1.0
  N  N25  1  0.408  0.575  0.758  1.0
  N  N26  1  0.758  0.408  0.575  1.0
  N  N27  1  0.575  0.758  0.408  1.0
[/CIF]
.