Sm2PdGa12 crystallizes in the tetragonal P4/nbm space group. Sm(1) is bonded in a 14-coordinate geometry to two equivalent Ga(4), four equivalent Ga(1), four equivalent Ga(2), and four equivalent Ga(3) atoms. Pd(1) is bonded in a body-centered cubic geometry to eight equivalent Ga(3) atoms. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Ga(2), and four equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Ga(1), and four equivalent Ga(4) atoms. In the third Ga site, Ga(3) is bonded in a 2-coordinate geometry to two equivalent Sm(1), two equivalent Pd(1), and two equivalent Ga(1) atoms. In the fourth Ga site, Ga(4) is bonded in a 7-coordinate geometry to one Sm(1), two equivalent Ga(2), and four equivalent Ga(4) atoms.
Sm2PdGa12 crystallizes in the tetragonal P4/nbm space group. Sm(1) is bonded in a 14-coordinate geometry to two equivalent Ga(4), four equivalent Ga(1), four equivalent Ga(2), and four equivalent Ga(3) atoms. Both Sm(1)-Ga(4) bond lengths are 3.17 Å. All Sm(1)-Ga(1) bond lengths are 3.19 Å. All Sm(1)-Ga(2) bond lengths are 3.37 Å. There are two shorter (3.31 Å) and two longer (3.32 Å) Sm(1)-Ga(3) bond lengths. Pd(1) is bonded in a body-centered cubic geometry to eight equivalent Ga(3) atoms. There are four shorter (2.56 Å) and four longer (2.57 Å) Pd(1)-Ga(3) bond lengths. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Ga(2), and four equivalent Ga(3) atoms. The Ga(1)-Ga(2) bond length is 2.44 Å. All Ga(1)-Ga(3) bond lengths are 2.64 Å. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Ga(1), and four equivalent Ga(4) atoms. All Ga(2)-Ga(4) bond lengths are 2.62 Å. In the third Ga site, Ga(3) is bonded in a 2-coordinate geometry to two equivalent Sm(1), two equivalent Pd(1), and two equivalent Ga(1) atoms. In the fourth Ga site, Ga(4) is bonded in a 7-coordinate geometry to one Sm(1), two equivalent Ga(2), and four equivalent Ga(4) atoms. There are a spread of Ga(4)-Ga(4) bond distances ranging from 2.60-3.05 Å.