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.
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. The Sm(1)-Fe(1) bond length is 3.01 Å. The Sm(1)-Fe(7) bond length is 3.24 Å. The Sm(1)-Fe(8) bond length is 3.14 Å. There is one shorter (3.10 Å) and one longer (3.41 Å) Sm(1)-Fe(10) bond length. Both Sm(1)-Fe(3) bond lengths are 3.05 Å. Both Sm(1)-Fe(4) bond lengths are 3.04 Å. Both Sm(1)-Fe(5) bond lengths are 3.09 Å. Both Sm(1)-Fe(6) bond lengths are 3.24 Å. There are two shorter (3.16 Å) and two longer (3.29 Å) Sm(1)-Fe(9) bond lengths. Both Sm(1)-Ga(1) bond lengths are 3.14 Å. 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. The Sm(2)-Fe(10) bond length is 3.14 Å. The Sm(2)-Fe(2) bond length is 3.11 Å. The Sm(2)-Fe(7) bond length is 3.36 Å. Both Sm(2)-Fe(3) bond lengths are 3.08 Å. Both Sm(2)-Fe(4) bond lengths are 3.07 Å. Both Sm(2)-Fe(5) bond lengths are 3.06 Å. Both Sm(2)-Fe(6) bond lengths are 3.32 Å. There is one shorter (3.23 Å) and one longer (3.27 Å) Sm(2)-Fe(8) bond length. Both Sm(2)-Fe(9) bond lengths are 3.11 Å. There are two shorter (3.20 Å) and two longer (3.26 Å) Sm(2)-Ga(1) bond lengths. 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. The Fe(1)-Fe(10) bond length is 2.62 Å. The Fe(1)-Fe(2) bond length is 2.39 Å. The Fe(1)-Fe(7) bond length is 2.61 Å. Both Fe(1)-Fe(3) bond lengths are 2.75 Å. Both Fe(1)-Fe(4) bond lengths are 2.75 Å. Both Fe(1)-Fe(5) bond lengths are 2.76 Å. Both Fe(1)-Fe(6) bond lengths are 2.62 Å. Both Fe(1)-Fe(9) bond lengths are 2.63 Å. 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. The Fe(2)-Fe(7) bond length is 2.70 Å. The Fe(2)-Fe(8) bond length is 2.66 Å. Both Fe(2)-Fe(3) bond lengths are 2.73 Å. Both Fe(2)-Fe(4) bond lengths are 2.74 Å. Both Fe(2)-Fe(5) bond lengths are 2.77 Å. Both Fe(2)-Fe(6) bond lengths are 2.61 Å. Both Fe(2)-Ga(1) bond lengths are 2.68 Å. 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. The Fe(3)-Fe(3) bond length is 2.45 Å. The Fe(3)-Fe(4) bond length is 2.49 Å. The Fe(3)-Fe(6) bond length is 2.43 Å. The Fe(3)-Fe(7) bond length is 2.46 Å. The Fe(3)-Fe(8) bond length is 2.54 Å. There is one shorter (2.56 Å) and one longer (2.66 Å) Fe(3)-Fe(9) bond length. The Fe(3)-Ga(1) bond length is 2.66 Å. 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. The Fe(4)-Fe(10) bond length is 2.64 Å. The Fe(4)-Fe(5) bond length is 2.50 Å. The Fe(4)-Fe(8) bond length is 2.64 Å. The Fe(4)-Fe(9) bond length is 2.53 Å. Both Fe(4)-Fe(6) bond lengths are 2.45 Å. The Fe(4)-Ga(1) bond length is 2.59 Å. 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. The Fe(5)-Fe(10) bond length is 2.54 Å. The Fe(5)-Fe(5) bond length is 2.43 Å. The Fe(5)-Fe(6) bond length is 2.46 Å. The Fe(5)-Fe(7) bond length is 2.44 Å. The Fe(5)-Fe(9) bond length is 2.72 Å. There is one shorter (2.59 Å) and one longer (2.64 Å) Fe(5)-Ga(1) bond length. 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. The Fe(6)-Fe(10) bond length is 2.43 Å. The Fe(6)-Fe(8) bond length is 2.46 Å. The Fe(6)-Fe(9) bond length is 2.45 Å. The Fe(6)-Ga(1) bond length is 2.50 Å. 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. Both Fe(7)-Fe(9) bond lengths are 2.46 Å. Both Fe(7)-Ga(1) bond lengths are 2.48 Å. 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. Both Fe(8)-Fe(9) bond lengths are 2.48 Å. 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. The Fe(9)-Ga(1) bond length is 2.55 Å. 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. Both Fe(10)-Ga(1) bond lengths are 2.54 Å. 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.