The crystal structure described by Sm6Fe11Al3 crystallizes in the tetragonal I4cm space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 6-coordinate geometry to one Fe(1), three equivalent Fe(5), and two equivalent Al(1) atoms. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one Fe(2), two equivalent Al(1), and three equivalent Al(2) atoms. In the third Sm site, Sm(3) is bonded in a 13-coordinate geometry to four equivalent Fe(2), four equivalent Fe(3), one Al(1), and four equivalent Al(2) atoms. In the fourth Sm site, Sm(4) is bonded in a 13-coordinate geometry to four equivalent Fe(1), four equivalent Fe(3), four equivalent Fe(5), and one Al(1) atom. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to one Sm(1), two equivalent Sm(4), one Fe(2), one Fe(4), three equivalent Fe(5), and four equivalent Fe(3) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to one Sm(2), two equivalent Sm(3), one Fe(1), one Fe(4), four equivalent Fe(3), and three equivalent Al(2) atoms. In the third Fe site, Fe(3) is bonded to one Sm(3), one Sm(4), one Fe(4), one Fe(5), two equivalent Fe(1), two equivalent Fe(2), three equivalent Fe(3), and one Al(2) atom to form FeSm2AlFe9 cuboctahedra that share  a cornercorner with one Fe(4)Al2Fe10 cuboctahedra, corners with two equivalent Fe(5)Sm5Fe7 cuboctahedra, corners with three equivalent Fe(3)Sm2AlFe9 cuboctahedra, faces with two equivalent Fe(4)Al2Fe10 cuboctahedra, faces with four equivalent Fe(5)Sm5Fe7 cuboctahedra, and faces with seven equivalent Fe(3)Sm2AlFe9 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(5), four equivalent Fe(3), and two equivalent Al(2) atoms to form FeAl2Fe10 cuboctahedra that share corners with two equivalent Fe(5)Sm5Fe7 cuboctahedra, corners with four equivalent Fe(3)Sm2AlFe9 cuboctahedra, faces with two equivalent Fe(5)Sm5Fe7 cuboctahedra, and faces with eight equivalent Fe(3)Sm2AlFe9 cuboctahedra. In the fifth Fe site, Fe(5) is bonded to two equivalent Sm(4), three equivalent Sm(1), one Fe(4), one Fe(5), two equivalent Fe(3), and three equivalent Fe(1) atoms to form distorted FeSm5Fe7 cuboctahedra that share  a cornercorner with one Fe(4)Al2Fe10 cuboctahedra, corners with two equivalent Fe(5)Sm5Fe7 cuboctahedra, corners with four equivalent Fe(3)Sm2AlFe9 cuboctahedra,  a faceface with one Fe(4)Al2Fe10 cuboctahedra, faces with five equivalent Fe(5)Sm5Fe7 cuboctahedra, and faces with eight equivalent Fe(3)Sm2AlFe9 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted q6 geometry to one Sm(3), one Sm(4), four equivalent Sm(1), and four equivalent Sm(2) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Sm(3), three equivalent Sm(2), one Fe(4), two equivalent Fe(3), three equivalent Fe(2), and one Al(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sm6Al3Fe11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.092
_cell_length_b   8.092
_cell_length_c   12.990
_cell_angle_alpha   71.866
_cell_angle_beta   71.866
_cell_angle_gamma   90.003
_symmetry_Int_Tables_number   1
_cell_volume   763.721
_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
  Sm  Sm0  1  0.350  0.850  0.627  1.0
  Sm  Sm1  1  0.023  0.523  0.627  1.0
  Sm  Sm2  1  0.523  0.350  0.627  1.0
  Sm  Sm3  1  0.850  0.023  0.627  1.0
  Sm  Sm4  1  0.641  0.141  0.389  1.0
  Sm  Sm5  1  0.971  0.471  0.389  1.0
  Sm  Sm6  1  0.471  0.641  0.389  1.0
  Sm  Sm7  1  0.141  0.971  0.389  1.0
  Sm  Sm8  1  0.392  0.392  0.216  1.0
  Sm  Sm9  1  0.892  0.892  0.216  1.0
  Sm  Sm10  1  0.608  0.608  0.784  1.0
  Sm  Sm11  1  0.108  0.108  0.784  1.0
  Al  Al12  1  0.750  0.750  0.500  1.0
  Al  Al13  1  0.250  0.250  0.500  1.0
  Al  Al14  1  0.523  0.023  0.192  1.0
  Al  Al15  1  0.285  0.785  0.192  1.0
  Al  Al16  1  0.785  0.523  0.192  1.0
  Al  Al17  1  0.023  0.285  0.192  1.0
  Fe  Fe18  1  0.238  0.738  0.879  1.0
  Fe  Fe19  1  0.883  0.383  0.879  1.0
  Fe  Fe20  1  0.383  0.238  0.879  1.0
  Fe  Fe21  1  0.738  0.883  0.879  1.0
  Fe  Fe22  1  0.768  0.268  0.111  1.0
  Fe  Fe23  1  0.121  0.621  0.111  1.0
  Fe  Fe24  1  0.621  0.769  0.110  1.0
  Fe  Fe25  1  0.269  0.121  0.110  1.0
  Fe  Fe26  1  0.709  0.569  0.997  1.0
  Fe  Fe27  1  0.293  0.433  0.997  1.0
  Fe  Fe28  1  0.793  0.069  0.997  1.0
  Fe  Fe29  1  0.209  0.933  0.997  1.0
  Fe  Fe30  1  0.569  0.293  0.997  1.0
  Fe  Fe31  1  0.433  0.709  0.997  1.0
  Fe  Fe32  1  0.069  0.209  0.997  1.0
  Fe  Fe33  1  0.933  0.793  0.997  1.0
  Fe  Fe34  1  0.000  0.500  0.999  1.0
  Fe  Fe35  1  0.500  0.000  0.999  1.0
  Fe  Fe36  1  0.480  0.980  0.810  1.0
  Fe  Fe37  1  0.710  0.210  0.810  1.0
  Fe  Fe38  1  0.210  0.480  0.810  1.0
  Fe  Fe39  1  0.980  0.710  0.810  1.0
[/CIF]
.
The crystal structure described by Sm6Fe11Al3 crystallizes in the tetragonal I4cm space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 6-coordinate geometry to one Fe(1), three equivalent Fe(5), and two equivalent Al(1) atoms. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one Fe(2), two equivalent Al(1), and three equivalent Al(2) atoms. In the third Sm site, Sm(3) is bonded in a 13-coordinate geometry to four equivalent Fe(2), four equivalent Fe(3), one Al(1), and four equivalent Al(2) atoms. In the fourth Sm site, Sm(4) is bonded in a 13-coordinate geometry to four equivalent Fe(1), four equivalent Fe(3), four equivalent Fe(5), and one Al(1) atom. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to one Sm(1), two equivalent Sm(4), one Fe(2), one Fe(4), three equivalent Fe(5), and four equivalent Fe(3) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to one Sm(2), two equivalent Sm(3), one Fe(1), one Fe(4), four equivalent Fe(3), and three equivalent Al(2) atoms. In the third Fe site, Fe(3) is bonded to one Sm(3), one Sm(4), one Fe(4), one Fe(5), two equivalent Fe(1), two equivalent Fe(2), three equivalent Fe(3), and one Al(2) atom to form FeSm2AlFe9 cuboctahedra that share  a cornercorner with one Fe(4)Al2Fe10 cuboctahedra, corners with two equivalent Fe(5)Sm5Fe7 cuboctahedra, corners with three equivalent Fe(3)Sm2AlFe9 cuboctahedra, faces with two equivalent Fe(4)Al2Fe10 cuboctahedra, faces with four equivalent Fe(5)Sm5Fe7 cuboctahedra, and faces with seven equivalent Fe(3)Sm2AlFe9 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent Fe(1), two equivalent Fe(2), two equivalent Fe(5), four equivalent Fe(3), and two equivalent Al(2) atoms to form FeAl2Fe10 cuboctahedra that share corners with two equivalent Fe(5)Sm5Fe7 cuboctahedra, corners with four equivalent Fe(3)Sm2AlFe9 cuboctahedra, faces with two equivalent Fe(5)Sm5Fe7 cuboctahedra, and faces with eight equivalent Fe(3)Sm2AlFe9 cuboctahedra. In the fifth Fe site, Fe(5) is bonded to two equivalent Sm(4), three equivalent Sm(1), one Fe(4), one Fe(5), two equivalent Fe(3), and three equivalent Fe(1) atoms to form distorted FeSm5Fe7 cuboctahedra that share  a cornercorner with one Fe(4)Al2Fe10 cuboctahedra, corners with two equivalent Fe(5)Sm5Fe7 cuboctahedra, corners with four equivalent Fe(3)Sm2AlFe9 cuboctahedra,  a faceface with one Fe(4)Al2Fe10 cuboctahedra, faces with five equivalent Fe(5)Sm5Fe7 cuboctahedra, and faces with eight equivalent Fe(3)Sm2AlFe9 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted q6 geometry to one Sm(3), one Sm(4), four equivalent Sm(1), and four equivalent Sm(2) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Sm(3), three equivalent Sm(2), one Fe(4), two equivalent Fe(3), three equivalent Fe(2), and one Al(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sm6Al3Fe11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.092
_cell_length_b   8.092
_cell_length_c   12.990
_cell_angle_alpha   71.866
_cell_angle_beta   71.866
_cell_angle_gamma   90.003
_symmetry_Int_Tables_number   1
_cell_volume   763.721
_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
  Sm  Sm0  1  0.350  0.850  0.627  1.0
  Sm  Sm1  1  0.023  0.523  0.627  1.0
  Sm  Sm2  1  0.523  0.350  0.627  1.0
  Sm  Sm3  1  0.850  0.023  0.627  1.0
  Sm  Sm4  1  0.641  0.141  0.389  1.0
  Sm  Sm5  1  0.971  0.471  0.389  1.0
  Sm  Sm6  1  0.471  0.641  0.389  1.0
  Sm  Sm7  1  0.141  0.971  0.389  1.0
  Sm  Sm8  1  0.392  0.392  0.216  1.0
  Sm  Sm9  1  0.892  0.892  0.216  1.0
  Sm  Sm10  1  0.608  0.608  0.784  1.0
  Sm  Sm11  1  0.108  0.108  0.784  1.0
  Al  Al12  1  0.750  0.750  0.500  1.0
  Al  Al13  1  0.250  0.250  0.500  1.0
  Al  Al14  1  0.523  0.023  0.192  1.0
  Al  Al15  1  0.285  0.785  0.192  1.0
  Al  Al16  1  0.785  0.523  0.192  1.0
  Al  Al17  1  0.023  0.285  0.192  1.0
  Fe  Fe18  1  0.238  0.738  0.879  1.0
  Fe  Fe19  1  0.883  0.383  0.879  1.0
  Fe  Fe20  1  0.383  0.238  0.879  1.0
  Fe  Fe21  1  0.738  0.883  0.879  1.0
  Fe  Fe22  1  0.768  0.268  0.111  1.0
  Fe  Fe23  1  0.121  0.621  0.111  1.0
  Fe  Fe24  1  0.621  0.769  0.110  1.0
  Fe  Fe25  1  0.269  0.121  0.110  1.0
  Fe  Fe26  1  0.709  0.569  0.997  1.0
  Fe  Fe27  1  0.293  0.433  0.997  1.0
  Fe  Fe28  1  0.793  0.069  0.997  1.0
  Fe  Fe29  1  0.209  0.933  0.997  1.0
  Fe  Fe30  1  0.569  0.293  0.997  1.0
  Fe  Fe31  1  0.433  0.709  0.997  1.0
  Fe  Fe32  1  0.069  0.209  0.997  1.0
  Fe  Fe33  1  0.933  0.793  0.997  1.0
  Fe  Fe34  1  0.000  0.500  0.999  1.0
  Fe  Fe35  1  0.500  0.000  0.999  1.0
  Fe  Fe36  1  0.480  0.980  0.810  1.0
  Fe  Fe37  1  0.710  0.210  0.810  1.0
  Fe  Fe38  1  0.210  0.480  0.810  1.0
  Fe  Fe39  1  0.980  0.710  0.810  1.0
[/CIF]
.