Pu4Zr crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded in a 8-coordinate geometry to two equivalent Pu(2), four equivalent Pu(1), and two equivalent Zr(1) atoms. In the second Pu site, Pu(2) is bonded in a 8-coordinate geometry to two equivalent Pu(1) and six equivalent Pu(2) atoms. Zr(1) is bonded in a 8-coordinate geometry to four equivalent Pu(1) and four equivalent Zr(1) atoms.
Pu4Zr crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded in a 8-coordinate geometry to two equivalent Pu(2), four equivalent Pu(1), and two equivalent Zr(1) atoms. Both Pu(1)-Pu(2) bond lengths are 2.56 Å. All Pu(1)-Pu(1) bond lengths are 2.92 Å. Both Pu(1)-Zr(1) bond lengths are 3.20 Å. In the second Pu site, Pu(2) is bonded in a 8-coordinate geometry to two equivalent Pu(1) and six equivalent Pu(2) atoms. There are two shorter (2.85 Å) and four longer (2.92 Å) Pu(2)-Pu(2) bond lengths. Zr(1) is bonded in a 8-coordinate geometry to four equivalent Pu(1) and four equivalent Zr(1) atoms. All Zr(1)-Zr(1) bond lengths are 2.92 Å.