AlPd5 crystallizes in the orthorhombic Pnma space group. There are five inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 3-coordinate geometry to two equivalent Pd(2) and three equivalent Al(1) atoms. In the second Pd site, Pd(2) is bonded to two equivalent Pd(1), two equivalent Pd(4), three equivalent Pd(3), three equivalent Pd(5), and two equivalent Al(1) atoms to form a mixture of distorted corner, edge, and face-sharing PdAl2Pd10 cuboctahedra. In the third Pd site, Pd(3) is bonded in a 3-coordinate geometry to three equivalent Pd(2) and three equivalent Al(1) atoms. In the fourth Pd site, Pd(4) is bonded in a distorted single-bond geometry to two equivalent Pd(2) and one Al(1) atom. In the fifth Pd site, Pd(5) is bonded in a distorted single-bond geometry to three equivalent Pd(2) and one Al(1) atom. Al(1) is bonded in a 10-coordinate geometry to one Pd(4), one Pd(5), two equivalent Pd(2), three equivalent Pd(1), and three equivalent Pd(3) atoms.
AlPd5 crystallizes in the orthorhombic Pnma space group. There are five inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 3-coordinate geometry to two equivalent Pd(2) and three equivalent Al(1) atoms. There is one shorter (2.72 Å) and one longer (2.74 Å) Pd(1)-Pd(2) bond length. There are two shorter (2.55 Å) and one longer (2.72 Å) Pd(1)-Al(1) bond length. In the second Pd site, Pd(2) is bonded to two equivalent Pd(1), two equivalent Pd(4), three equivalent Pd(3), three equivalent Pd(5), and two equivalent Al(1) atoms to form a mixture of distorted corner, edge, and face-sharing PdAl2Pd10 cuboctahedra. Both Pd(2)-Pd(4) bond lengths are 2.73 Å. There is one shorter (2.71 Å) and two longer (2.83 Å) Pd(2)-Pd(3) bond lengths. There is one shorter (2.69 Å) and two longer (2.72 Å) Pd(2)-Pd(5) bond lengths. Both Pd(2)-Al(1) bond lengths are 2.78 Å. In the third Pd site, Pd(3) is bonded in a 3-coordinate geometry to three equivalent Pd(2) and three equivalent Al(1) atoms. There are two shorter (2.55 Å) and one longer (2.69 Å) Pd(3)-Al(1) bond length. In the fourth Pd site, Pd(4) is bonded in a distorted single-bond geometry to two equivalent Pd(2) and one Al(1) atom. The Pd(4)-Al(1) bond length is 2.56 Å. In the fifth Pd site, Pd(5) is bonded in a distorted single-bond geometry to three equivalent Pd(2) and one Al(1) atom. The Pd(5)-Al(1) bond length is 2.56 Å. Al(1) is bonded in a 10-coordinate geometry to one Pd(4), one Pd(5), two equivalent Pd(2), three equivalent Pd(1), and three equivalent Pd(3) atoms.