SmGaSb2 crystallizes in the orthorhombic C222_1 space group. Sm(1) is bonded in a 10-coordinate geometry to two equivalent Ga(1), four equivalent Sb(1), and four equivalent Sb(2) atoms. Ga(1) is bonded in a 6-coordinate geometry to two equivalent Sm(1), two equivalent Ga(1), and two equivalent Sb(2) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Sb(1) atoms. In the second Sb site, Sb(2) is bonded to four equivalent Sm(1) and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing SbSm4Ga2 pentagonal pyramids.
SmGaSb2 crystallizes in the orthorhombic C222_1 space group. Sm(1) is bonded in a 10-coordinate geometry to two equivalent Ga(1), four equivalent Sb(1), and four equivalent Sb(2) atoms. Both Sm(1)-Ga(1) bond lengths are 3.34 Å. All Sm(1)-Sb(1) bond lengths are 3.34 Å. All Sm(1)-Sb(2) bond lengths are 3.24 Å. Ga(1) is bonded in a 6-coordinate geometry to two equivalent Sm(1), two equivalent Ga(1), and two equivalent Sb(2) atoms. Both Ga(1)-Ga(1) bond lengths are 2.58 Å. Both Ga(1)-Sb(2) bond lengths are 2.77 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Sb(1) atoms. All Sb(1)-Sb(1) bond lengths are 3.08 Å. In the second Sb site, Sb(2) is bonded to four equivalent Sm(1) and two equivalent Ga(1) atoms to form a mixture of distorted corner and edge-sharing SbSm4Ga2 pentagonal pyramids.