PuUC3 is Plutonium carbide-derived structured and crystallizes in the cubic I2_13 space group. Pu(1) is bonded in a 9-coordinate geometry to three equivalent C(2) and six equivalent C(1) atoms. U(1) is bonded in a 6-coordinate geometry to three equivalent C(1) and three equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(2) is bonded to two equivalent Pu(1), two equivalent U(1), and one C(1) atom to form distorted CPu2U2C trigonal bipyramids that share corners with twelve equivalent C(1)Pu4U2C pentagonal bipyramids, edges with three equivalent C(1)Pu4U2C pentagonal bipyramids, and edges with four equivalent C(2)Pu2U2C trigonal bipyramids. In the second C site, C(1) is bonded to four equivalent Pu(1), two equivalent U(1), and one C(2) atom to form distorted CPu4U2C pentagonal bipyramids that share corners with eight equivalent C(1)Pu4U2C pentagonal bipyramids, corners with twelve equivalent C(2)Pu2U2C trigonal bipyramids, edges with two equivalent C(1)Pu4U2C pentagonal bipyramids, edges with three equivalent C(2)Pu2U2C trigonal bipyramids, and faces with four equivalent C(1)Pu4U2C pentagonal bipyramids.
PuUC3 is Plutonium carbide-derived structured and crystallizes in the cubic I2_13 space group. Pu(1) is bonded in a 9-coordinate geometry to three equivalent C(2) and six equivalent C(1) atoms. All Pu(1)-C(2) bond lengths are 2.46 Å. There are three shorter (2.60 Å) and three longer (2.77 Å) Pu(1)-C(1) bond lengths. U(1) is bonded in a 6-coordinate geometry to three equivalent C(1) and three equivalent C(2) atoms. All U(1)-C(1) bond lengths are 2.45 Å. All U(1)-C(2) bond lengths are 2.53 Å. There are two inequivalent C sites. In the first C site, C(2) is bonded to two equivalent Pu(1), two equivalent U(1), and one C(1) atom to form distorted CPu2U2C trigonal bipyramids that share corners with twelve equivalent C(1)Pu4U2C pentagonal bipyramids, edges with three equivalent C(1)Pu4U2C pentagonal bipyramids, and edges with four equivalent C(2)Pu2U2C trigonal bipyramids. The C(2)-C(1) bond length is 1.42 Å. In the second C site, C(1) is bonded to four equivalent Pu(1), two equivalent U(1), and one C(2) atom to form distorted CPu4U2C pentagonal bipyramids that share corners with eight equivalent C(1)Pu4U2C pentagonal bipyramids, corners with twelve equivalent C(2)Pu2U2C trigonal bipyramids, edges with two equivalent C(1)Pu4U2C pentagonal bipyramids, edges with three equivalent C(2)Pu2U2C trigonal bipyramids, and faces with four equivalent C(1)Pu4U2C pentagonal bipyramids.