Mg3Pd5 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a body-centered cubic geometry to two equivalent Pd(2), two equivalent Pd(3), and four equivalent Pd(1) atoms. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Pd(3), four equivalent Pd(1), and four equivalent Pd(2) atoms. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Mg(2) atoms. In the second Pd site, Pd(2) is bonded in a 5-coordinate geometry to one Mg(1) and four equivalent Mg(2) atoms. In the third Pd site, Pd(3) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Mg(2) atoms.
Mg3Pd5 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a body-centered cubic geometry to two equivalent Pd(2), two equivalent Pd(3), and four equivalent Pd(1) atoms. Both Mg(1)-Pd(2) bond lengths are 2.66 Å. Both Mg(1)-Pd(3) bond lengths are 2.73 Å. All Mg(1)-Pd(1) bond lengths are 2.62 Å. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to two equivalent Pd(3), four equivalent Pd(1), and four equivalent Pd(2) atoms. Both Mg(2)-Pd(3) bond lengths are 2.72 Å. There are a spread of Mg(2)-Pd(1) bond distances ranging from 2.68-2.82 Å. There are two shorter (2.72 Å) and two longer (2.86 Å) Mg(2)-Pd(2) bond lengths. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Mg(2) atoms. In the second Pd site, Pd(2) is bonded in a 5-coordinate geometry to one Mg(1) and four equivalent Mg(2) atoms. In the third Pd site, Pd(3) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Mg(2) atoms.