The structure described by Sm2Fe15Ga2 crystallizes in the monoclinic Cm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 19-coordinate geometry to one Fe(1), one Fe(7), one Fe(8), two equivalent Fe(10), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), four equivalent Fe(9), and two equivalent Ga(1) atoms. In the second Sm site, Sm(2) is bonded in a 19-coordinate geometry to one Fe(10), one Fe(2), one Fe(7), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), two equivalent Fe(8), two equivalent Fe(9), and four equivalent Ga(1) atoms. There are ten inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 14-coordinate geometry to one Sm(1), one Fe(10), one Fe(2), one Fe(7), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Fe(9) atoms. In the second Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Sm(2), one Fe(1), one Fe(7), one Fe(8), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Ga(1) atoms. In the third Fe site, Fe(3) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(2), one Fe(3), one Fe(4), one Fe(6), one Fe(7), one Fe(8), two equivalent Fe(9), and one Ga(1) atom to form distorted FeSm2GaFe9 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with five equivalent Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(6)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra,  an edgeedge with one Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(3)Sm2GaFe9 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(8)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with three equivalent Ga(1)Sm3Fe9 cuboctahedra, and faces with four equivalent Fe(9)Sm3GaFe8 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(10), one Fe(2), one Fe(3), one Fe(5), one Fe(8), one Fe(9), two equivalent Fe(6), and one Ga(1) atom to form distorted FeSm2GaFe9 cuboctahedra that share  a cornercorner with one Fe(8)Sm3Fe9 cuboctahedra,  a cornercorner with one Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with three equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with five equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with five equivalent Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(9)Sm3GaFe8 cuboctahedra,  an edgeedge with one Ga(1)Sm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra,  a faceface with one Fe(4)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, and faces with three equivalent Ga(1)Sm3Fe9 cuboctahedra. In the fifth Fe site, Fe(5) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(10), one Fe(2), one Fe(4), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and two equivalent Ga(1) atoms to form distorted FeSm2Ga2Fe8 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a cornercorner with one Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with four equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with five equivalent Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(6)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(9)Sm3GaFe8 cuboctahedra,  a faceface with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, and faces with four equivalent Ga(1)Sm3Fe9 cuboctahedra. In the sixth Fe site, Fe(6) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(10), one Fe(2), one Fe(3), one Fe(5), one Fe(8), one Fe(9), two equivalent Fe(4), and one Ga(1) atom to form distorted FeSm2GaFe9 cuboctahedra that share  a cornercorner with one Fe(8)Sm3Fe9 cuboctahedra,  a cornercorner with one Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with four equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with four equivalent Ga(1)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, edges with two equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, and faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra. In the seventh Fe site, Fe(7) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(2), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(9), and two equivalent Ga(1) atoms to form distorted FeSm2Ga2Fe8 cuboctahedra that share corners with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with two equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with four equivalent Fe(6)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, edges with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, edges with two equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(6)Sm2GaFe9 cuboctahedra. In the eighth Fe site, Fe(8) is bonded to one Sm(1), two equivalent Sm(2), one Fe(2), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(6), and two equivalent Fe(9) atoms to form FeSm3Fe9 cuboctahedra that share corners with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with three equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with six equivalent Fe(9)Sm3GaFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with four equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with four equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Ga(1)Sm3Fe9 cuboctahedra. In the ninth Fe site, Fe(9) is bonded to one Sm(2), two equivalent Sm(1), one Fe(1), one Fe(4), one Fe(5), one Fe(6), one Fe(7), one Fe(8), two equivalent Fe(3), and one Ga(1) atom to form FeSm3GaFe8 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with four equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with five equivalent Ga(1)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Ga(1)Sm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(9)Sm3GaFe8 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(3)Sm2GaFe9 cuboctahedra. In the tenth Fe site, Fe(10) is bonded to one Sm(2), two equivalent Sm(1), one Fe(1), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Ga(1) atoms to form distorted FeSm3Ga2Fe7 cuboctahedra that share corners with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with three equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with four equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with six equivalent Ga(1)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra, edges with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with four equivalent Fe(9)Sm3GaFe8 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(9)Sm3GaFe8 cuboctahedra. Ga(1) is bonded to one Sm(1), two equivalent Sm(2), one Fe(10), one Fe(2), one Fe(3), one Fe(4), one Fe(6), one Fe(7), one Fe(9), and two equivalent Fe(5) atoms to form GaSm3Fe9 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with four equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with five equivalent Fe(9)Sm3GaFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(9)Sm3GaFe8 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(8)Sm3Fe9 cuboctahedra, edges with two equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra. is represented by the CIF file [CIF]
data_Sm2Ga2Fe15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.455
_cell_length_b   6.508
_cell_length_c   6.455
_cell_angle_alpha   83.110
_cell_angle_beta   82.552
_cell_angle_gamma   83.110
_symmetry_Int_Tables_number   1
_cell_volume   265.452
_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  0.662  0.666  0.662  1.0
  Sm  Sm1  1  0.343  0.342  0.343  1.0
  Ga  Ga2  1  0.847  0.344  0.344  1.0
  Ga  Ga3  1  0.344  0.344  0.847  1.0
  Fe  Fe4  1  0.904  0.903  0.904  1.0
  Fe  Fe5  1  0.096  0.092  0.096  1.0
  Fe  Fe6  1  0.288  0.711  0.001  1.0
  Fe  Fe7  1  0.709  0.999  0.290  1.0
  Fe  Fe8  1  0.997  0.288  0.711  1.0
  Fe  Fe9  1  0.290  0.999  0.709  1.0
  Fe  Fe10  1  0.001  0.711  0.288  1.0
  Fe  Fe11  1  0.711  0.288  0.997  1.0
  Fe  Fe12  1  1.000  0.998  0.499  1.0
  Fe  Fe13  1  0.996  0.503  0.996  1.0
  Fe  Fe14  1  0.499  0.998  1.000  1.0
  Fe  Fe15  1  0.342  0.846  0.342  1.0
  Fe  Fe16  1  0.154  0.663  0.656  1.0
  Fe  Fe17  1  0.656  0.663  0.154  1.0
  Fe  Fe18  1  0.660  0.143  0.660  1.0
[/CIF]
.
The structure described by Sm2Fe15Ga2 crystallizes in the monoclinic Cm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 19-coordinate geometry to one Fe(1), one Fe(7), one Fe(8), two equivalent Fe(10), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), four equivalent Fe(9), and two equivalent Ga(1) atoms. In the second Sm site, Sm(2) is bonded in a 19-coordinate geometry to one Fe(10), one Fe(2), one Fe(7), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), two equivalent Fe(8), two equivalent Fe(9), and four equivalent Ga(1) atoms. There are ten inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 14-coordinate geometry to one Sm(1), one Fe(10), one Fe(2), one Fe(7), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Fe(9) atoms. In the second Fe site, Fe(2) is bonded in a 14-coordinate geometry to one Sm(2), one Fe(1), one Fe(7), one Fe(8), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Ga(1) atoms. In the third Fe site, Fe(3) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(2), one Fe(3), one Fe(4), one Fe(6), one Fe(7), one Fe(8), two equivalent Fe(9), and one Ga(1) atom to form distorted FeSm2GaFe9 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a cornercorner with one Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with five equivalent Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(6)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra,  an edgeedge with one Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(3)Sm2GaFe9 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(8)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with three equivalent Ga(1)Sm3Fe9 cuboctahedra, and faces with four equivalent Fe(9)Sm3GaFe8 cuboctahedra. In the fourth Fe site, Fe(4) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(10), one Fe(2), one Fe(3), one Fe(5), one Fe(8), one Fe(9), two equivalent Fe(6), and one Ga(1) atom to form distorted FeSm2GaFe9 cuboctahedra that share  a cornercorner with one Fe(8)Sm3Fe9 cuboctahedra,  a cornercorner with one Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with three equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with five equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with five equivalent Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(9)Sm3GaFe8 cuboctahedra,  an edgeedge with one Ga(1)Sm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra,  a faceface with one Fe(4)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, and faces with three equivalent Ga(1)Sm3Fe9 cuboctahedra. In the fifth Fe site, Fe(5) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(10), one Fe(2), one Fe(4), one Fe(5), one Fe(6), one Fe(7), one Fe(9), and two equivalent Ga(1) atoms to form distorted FeSm2Ga2Fe8 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a cornercorner with one Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with four equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with five equivalent Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(6)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(9)Sm3GaFe8 cuboctahedra,  a faceface with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(9)Sm3GaFe8 cuboctahedra, and faces with four equivalent Ga(1)Sm3Fe9 cuboctahedra. In the sixth Fe site, Fe(6) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(10), one Fe(2), one Fe(3), one Fe(5), one Fe(8), one Fe(9), two equivalent Fe(4), and one Ga(1) atom to form distorted FeSm2GaFe9 cuboctahedra that share  a cornercorner with one Fe(8)Sm3Fe9 cuboctahedra,  a cornercorner with one Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with four equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with four equivalent Ga(1)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, edges with two equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, and faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra. In the seventh Fe site, Fe(7) is bonded to one Sm(1), one Sm(2), one Fe(1), one Fe(2), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(9), and two equivalent Ga(1) atoms to form distorted FeSm2Ga2Fe8 cuboctahedra that share corners with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with two equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with four equivalent Fe(6)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, edges with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, edges with two equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(6)Sm2GaFe9 cuboctahedra. In the eighth Fe site, Fe(8) is bonded to one Sm(1), two equivalent Sm(2), one Fe(2), two equivalent Fe(3), two equivalent Fe(4), two equivalent Fe(6), and two equivalent Fe(9) atoms to form FeSm3Fe9 cuboctahedra that share corners with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with three equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with six equivalent Fe(9)Sm3GaFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with four equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with four equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Ga(1)Sm3Fe9 cuboctahedra. In the ninth Fe site, Fe(9) is bonded to one Sm(2), two equivalent Sm(1), one Fe(1), one Fe(4), one Fe(5), one Fe(6), one Fe(7), one Fe(8), two equivalent Fe(3), and one Ga(1) atom to form FeSm3GaFe8 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, corners with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with four equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with five equivalent Ga(1)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(5)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Ga(1)Sm3Fe9 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, edges with two equivalent Fe(9)Sm3GaFe8 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(3)Sm2GaFe9 cuboctahedra. In the tenth Fe site, Fe(10) is bonded to one Sm(2), two equivalent Sm(1), one Fe(1), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and two equivalent Ga(1) atoms to form distorted FeSm3Ga2Fe7 cuboctahedra that share corners with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with two equivalent Fe(8)Sm3Fe9 cuboctahedra, corners with two equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with three equivalent Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with four equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with six equivalent Ga(1)Sm3Fe9 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(8)Sm3Fe9 cuboctahedra, edges with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with four equivalent Fe(9)Sm3GaFe8 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, faces with four equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(9)Sm3GaFe8 cuboctahedra. Ga(1) is bonded to one Sm(1), two equivalent Sm(2), one Fe(10), one Fe(2), one Fe(3), one Fe(4), one Fe(6), one Fe(7), one Fe(9), and two equivalent Fe(5) atoms to form GaSm3Fe9 cuboctahedra that share  a cornercorner with one Fe(7)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra, corners with two equivalent Ga(1)Sm3Fe9 cuboctahedra, corners with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, corners with three equivalent Fe(10)Sm3Ga2Fe7 cuboctahedra, corners with four equivalent Fe(6)Sm2GaFe9 cuboctahedra, corners with five equivalent Fe(9)Sm3GaFe8 cuboctahedra,  an edgeedge with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  an edgeedge with one Fe(3)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(4)Sm2GaFe9 cuboctahedra,  an edgeedge with one Fe(9)Sm3GaFe8 cuboctahedra, edges with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, edges with two equivalent Fe(8)Sm3Fe9 cuboctahedra, edges with two equivalent Ga(1)Sm3Fe9 cuboctahedra,  a faceface with one Fe(7)Sm2Ga2Fe8 cuboctahedra,  a faceface with one Fe(10)Sm3Ga2Fe7 cuboctahedra, faces with two equivalent Fe(6)Sm2GaFe9 cuboctahedra, faces with two equivalent Fe(8)Sm3Fe9 cuboctahedra, faces with two equivalent Fe(9)Sm3GaFe8 cuboctahedra, faces with two equivalent Ga(1)Sm3Fe9 cuboctahedra, faces with three equivalent Fe(3)Sm2GaFe9 cuboctahedra, faces with three equivalent Fe(4)Sm2GaFe9 cuboctahedra, and faces with four equivalent Fe(5)Sm2Ga2Fe8 cuboctahedra. is represented by the CIF file [CIF]
data_Sm2Ga2Fe15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.455
_cell_length_b   6.508
_cell_length_c   6.455
_cell_angle_alpha   83.110
_cell_angle_beta   82.552
_cell_angle_gamma   83.110
_symmetry_Int_Tables_number   1
_cell_volume   265.452
_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  0.662  0.666  0.662  1.0
  Sm  Sm1  1  0.343  0.342  0.343  1.0
  Ga  Ga2  1  0.847  0.344  0.344  1.0
  Ga  Ga3  1  0.344  0.344  0.847  1.0
  Fe  Fe4  1  0.904  0.903  0.904  1.0
  Fe  Fe5  1  0.096  0.092  0.096  1.0
  Fe  Fe6  1  0.288  0.711  0.001  1.0
  Fe  Fe7  1  0.709  0.999  0.290  1.0
  Fe  Fe8  1  0.997  0.288  0.711  1.0
  Fe  Fe9  1  0.290  0.999  0.709  1.0
  Fe  Fe10  1  0.001  0.711  0.288  1.0
  Fe  Fe11  1  0.711  0.288  0.997  1.0
  Fe  Fe12  1  1.000  0.998  0.499  1.0
  Fe  Fe13  1  0.996  0.503  0.996  1.0
  Fe  Fe14  1  0.499  0.998  1.000  1.0
  Fe  Fe15  1  0.342  0.846  0.342  1.0
  Fe  Fe16  1  0.154  0.663  0.656  1.0
  Fe  Fe17  1  0.656  0.663  0.154  1.0
  Fe  Fe18  1  0.660  0.143  0.660  1.0
[/CIF]
.