Materials Data on NpAu3 by Materials Project
NpAu3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Np3+ is bonded in a distorted body-centered cubic geometry to fourteen Au1- atoms. There are eight shorter (3.02 Å) and six longer (3.49 Å) Np–Au bond lengths. There are two inequivalent Au1- sites. In the first Au1- site, Au1- is bonded to four equivalent Np3+ and four equivalent Au1- atoms to form a mixture of distorted face, edge, and corner-sharing AuNp4Au4 tetrahedra. All Au–Au bond lengths are 3.02 Å. In the second Au1- site, Au1- is bonded in a 8-coordinate geometry to six equivalent Np3+ and eight equivalent Au1- atoms.
36 MATERIALS SCIENCE↗