The material structure described by Al11Sm3 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Al(2), four equivalent Al(4), and eight equivalent Al(3) atoms to form distorted SmAl16 cuboctahedra that share corners with four equivalent Al(1)Sm4Al8 cuboctahedra, faces with two equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Al(1)Sm4Al8 cuboctahedra, and faces with four equivalent Al(2)Sm4Al8 cuboctahedra. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and six equivalent Al(4) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Sm(2), four equivalent Al(2), and four equivalent Al(4) atoms to form AlSm4Al8 cuboctahedra that share corners with four equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Al(1)Sm4Al8 cuboctahedra, and faces with four equivalent Al(2)Sm4Al8 cuboctahedra. In the second Al site, Al(2) is bonded to two equivalent Sm(1), two equivalent Sm(2), two equivalent Al(1), two equivalent Al(3), and four equivalent Al(4) atoms to form distorted AlSm4Al8 cuboctahedra that share corners with four equivalent Al(2)Sm4Al8 cuboctahedra,  an edgeedge with one Al(2)Sm4Al8 cuboctahedra, faces with two equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Al(1)Sm4Al8 cuboctahedra, and faces with three equivalent Al(2)Sm4Al8 cuboctahedra. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), one Al(2), one Al(3), and three equivalent Al(4) atoms. In the fourth Al site, Al(4) is bonded in a 10-coordinate geometry to one Sm(1), three equivalent Sm(2), one Al(1), two equivalent Al(2), and three equivalent Al(3) atoms. is represented by the CIF card [CIF]
data_Sm3Al11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.406
_cell_length_b   8.406
_cell_length_c   8.406
_cell_angle_alpha   150.091
_cell_angle_beta   107.992
_cell_angle_gamma   79.881
_symmetry_Int_Tables_number   1
_cell_volume   276.346
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Sm  Sm1  1  0.316  0.316  0.000  1.0
  Sm  Sm2  1  0.684  0.684  0.000  1.0
  Al  Al3  1  0.500  0.000  0.500  1.0
  Al  Al4  1  0.287  0.500  0.787  1.0
  Al  Al5  1  0.713  0.500  0.213  1.0
  Al  Al6  1  0.966  0.334  0.632  1.0
  Al  Al7  1  0.034  0.666  0.368  1.0
  Al  Al8  1  0.703  0.334  0.368  1.0
  Al  Al9  1  0.297  0.666  0.632  1.0
  Al  Al10  1  0.860  0.135  0.725  1.0
  Al  Al11  1  0.140  0.865  0.275  1.0
  Al  Al12  1  0.411  0.135  0.275  1.0
  Al  Al13  1  0.589  0.865  0.725  1.0
[/CIF]
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The material structure described by Al11Sm3 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Al(2), four equivalent Al(4), and eight equivalent Al(3) atoms to form distorted SmAl16 cuboctahedra that share corners with four equivalent Al(1)Sm4Al8 cuboctahedra, faces with two equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Al(1)Sm4Al8 cuboctahedra, and faces with four equivalent Al(2)Sm4Al8 cuboctahedra. In the second Sm site, Sm(2) is bonded in a 12-coordinate geometry to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and six equivalent Al(4) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Sm(2), four equivalent Al(2), and four equivalent Al(4) atoms to form AlSm4Al8 cuboctahedra that share corners with four equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Al(1)Sm4Al8 cuboctahedra, and faces with four equivalent Al(2)Sm4Al8 cuboctahedra. In the second Al site, Al(2) is bonded to two equivalent Sm(1), two equivalent Sm(2), two equivalent Al(1), two equivalent Al(3), and four equivalent Al(4) atoms to form distorted AlSm4Al8 cuboctahedra that share corners with four equivalent Al(2)Sm4Al8 cuboctahedra,  an edgeedge with one Al(2)Sm4Al8 cuboctahedra, faces with two equivalent Sm(1)Al16 cuboctahedra, faces with two equivalent Al(1)Sm4Al8 cuboctahedra, and faces with three equivalent Al(2)Sm4Al8 cuboctahedra. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Sm(1), two equivalent Sm(2), one Al(2), one Al(3), and three equivalent Al(4) atoms. In the fourth Al site, Al(4) is bonded in a 10-coordinate geometry to one Sm(1), three equivalent Sm(2), one Al(1), two equivalent Al(2), and three equivalent Al(3) atoms. is represented by the CIF card [CIF]
data_Sm3Al11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.406
_cell_length_b   8.406
_cell_length_c   8.406
_cell_angle_alpha   150.091
_cell_angle_beta   107.992
_cell_angle_gamma   79.881
_symmetry_Int_Tables_number   1
_cell_volume   276.346
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Sm  Sm1  1  0.316  0.316  0.000  1.0
  Sm  Sm2  1  0.684  0.684  0.000  1.0
  Al  Al3  1  0.500  0.000  0.500  1.0
  Al  Al4  1  0.287  0.500  0.787  1.0
  Al  Al5  1  0.713  0.500  0.213  1.0
  Al  Al6  1  0.966  0.334  0.632  1.0
  Al  Al7  1  0.034  0.666  0.368  1.0
  Al  Al8  1  0.703  0.334  0.368  1.0
  Al  Al9  1  0.297  0.666  0.632  1.0
  Al  Al10  1  0.860  0.135  0.725  1.0
  Al  Al11  1  0.140  0.865  0.275  1.0
  Al  Al12  1  0.411  0.135  0.275  1.0
  Al  Al13  1  0.589  0.865  0.725  1.0
[/CIF]
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