U3Pt is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to four equivalent U(2) and four equivalent Pt(1) atoms to form a mixture of distorted corner, edge, and face-sharing UU4Pt4 tetrahedra. In the second U site, U(2) is bonded in a 14-coordinate geometry to eight equivalent U(1) and six equivalent Pt(1) atoms. Pt(1) is bonded in a distorted body-centered cubic geometry to six equivalent U(2) and eight equivalent U(1) atoms.
U3Pt is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to four equivalent U(2) and four equivalent Pt(1) atoms to form a mixture of distorted corner, edge, and face-sharing UU4Pt4 tetrahedra. All U(1)-U(2) bond lengths are 2.92 Å. All U(1)-Pt(1) bond lengths are 2.92 Å. In the second U site, U(2) is bonded in a 14-coordinate geometry to eight equivalent U(1) and six equivalent Pt(1) atoms. All U(2)-Pt(1) bond lengths are 3.37 Å. Pt(1) is bonded in a distorted body-centered cubic geometry to six equivalent U(2) and eight equivalent U(1) atoms.