PmHg3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. Pm(1) is bonded in a distorted body-centered cubic geometry to six equivalent Hg(2) and eight equivalent Hg(1) atoms. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded to four equivalent Pm(1) and four equivalent Hg(2) atoms to form a mixture of distorted corner, edge, and face-sharing HgPm4Hg4 tetrahedra. In the second Hg site, Hg(2) is bonded in a 14-coordinate geometry to six equivalent Pm(1) and eight equivalent Hg(1) atoms.
PmHg3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. Pm(1) is bonded in a distorted body-centered cubic geometry to six equivalent Hg(2) and eight equivalent Hg(1) atoms. All Pm(1)-Hg(2) bond lengths are 3.64 Å. All Pm(1)-Hg(1) bond lengths are 3.15 Å. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded to four equivalent Pm(1) and four equivalent Hg(2) atoms to form a mixture of distorted corner, edge, and face-sharing HgPm4Hg4 tetrahedra. All Hg(1)-Hg(2) bond lengths are 3.15 Å. In the second Hg site, Hg(2) is bonded in a 14-coordinate geometry to six equivalent Pm(1) and eight equivalent Hg(1) atoms.