U2PtPd3Al6 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a distorted hexagonal planar geometry to one Pt(1), one Pd(3), two equivalent Pd(1), and two equivalent Pd(2) atoms. In the second U site, U(2) is bonded in a distorted hexagonal planar geometry to two equivalent Pt(1), one Pd(1), one Pd(2), and two equivalent Pd(3) atoms. Pt(1) is bonded in a 9-coordinate geometry to one U(1), two equivalent U(2), two equivalent Al(1), and four equivalent Al(3) atoms. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 9-coordinate geometry to one U(2), two equivalent U(1), two equivalent Al(2), and four equivalent Al(4) atoms. In the second Pd site, Pd(2) is bonded in a 9-coordinate geometry to one U(2), two equivalent U(1), two equivalent Al(2), and four equivalent Al(3) atoms. In the third Pd site, Pd(3) is bonded in a 9-coordinate geometry to one U(1), two equivalent U(2), two equivalent Al(1), and four equivalent Al(4) atoms. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pd(3) atoms. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Pd(1) and two equivalent Pd(2) atoms. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pd(2) atoms. In the fourth Al site, Al(4) is bonded in a 4-coordinate geometry to two equivalent Pd(1) and two equivalent Pd(3) atoms.
U2PtPd3Al6 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a distorted hexagonal planar geometry to one Pt(1), one Pd(3), two equivalent Pd(1), and two equivalent Pd(2) atoms. The U(1)-Pt(1) bond length is 3.09 Å. The U(1)-Pd(3) bond length is 3.10 Å. Both U(1)-Pd(1) bond lengths are 3.10 Å. Both U(1)-Pd(2) bond lengths are 3.09 Å. In the second U site, U(2) is bonded in a distorted hexagonal planar geometry to two equivalent Pt(1), one Pd(1), one Pd(2), and two equivalent Pd(3) atoms. Both U(2)-Pt(1) bond lengths are 3.10 Å. The U(2)-Pd(1) bond length is 3.11 Å. The U(2)-Pd(2) bond length is 3.10 Å. Both U(2)-Pd(3) bond lengths are 3.11 Å. Pt(1) is bonded in a 9-coordinate geometry to one U(1), two equivalent U(2), two equivalent Al(1), and four equivalent Al(3) atoms. Both Pt(1)-Al(1) bond lengths are 2.62 Å. All Pt(1)-Al(3) bond lengths are 2.62 Å. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 9-coordinate geometry to one U(2), two equivalent U(1), two equivalent Al(2), and four equivalent Al(4) atoms. Both Pd(1)-Al(2) bond lengths are 2.62 Å. All Pd(1)-Al(4) bond lengths are 2.62 Å. In the second Pd site, Pd(2) is bonded in a 9-coordinate geometry to one U(2), two equivalent U(1), two equivalent Al(2), and four equivalent Al(3) atoms. Both Pd(2)-Al(2) bond lengths are 2.61 Å. All Pd(2)-Al(3) bond lengths are 2.63 Å. In the third Pd site, Pd(3) is bonded in a 9-coordinate geometry to one U(1), two equivalent U(2), two equivalent Al(1), and four equivalent Al(4) atoms. Both Pd(3)-Al(1) bond lengths are 2.63 Å. All Pd(3)-Al(4) bond lengths are 2.62 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pd(3) atoms. In the second Al site, Al(2) is bonded in a 4-coordinate geometry to two equivalent Pd(1) and two equivalent Pd(2) atoms. In the third Al site, Al(3) is bonded in a 4-coordinate geometry to two equivalent Pt(1) and two equivalent Pd(2) atoms. In the fourth Al site, Al(4) is bonded in a 4-coordinate geometry to two equivalent Pd(1) and two equivalent Pd(3) atoms.