Yb3Pm is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a distorted body-centered cubic geometry to four equivalent Yb(2) and four equivalent Pm(1) atoms. In the second Yb site, Yb(2) is bonded in a distorted body-centered cubic geometry to eight equivalent Yb(1) and six equivalent Pm(1) atoms. Pm(1) is bonded in a distorted body-centered cubic geometry to six equivalent Yb(2) and eight equivalent Yb(1) atoms.
Yb3Pm is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a distorted body-centered cubic geometry to four equivalent Yb(2) and four equivalent Pm(1) atoms. All Yb(1)-Yb(2) bond lengths are 3.64 Å. All Yb(1)-Pm(1) bond lengths are 3.64 Å. In the second Yb site, Yb(2) is bonded in a distorted body-centered cubic geometry to eight equivalent Yb(1) and six equivalent Pm(1) atoms. All Yb(2)-Pm(1) bond lengths are 4.21 Å. Pm(1) is bonded in a distorted body-centered cubic geometry to six equivalent Yb(2) and eight equivalent Yb(1) atoms.