DOE OSTI2020
NpF4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Np4+ sites. In the first Np4+ site, Np4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Np–F bond distances ranging from 2.26–2.35 Å. In the second Np4+ site, Np4+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Np–F bond distances ranging from 2.24–2.31 Å. There are seven inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two equivalent Np4+ atoms. In the second F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Np4+ atoms. In the third F1- site, F1- is bonded in a distorted linear geometry to two Np4+ atoms. In the fourth F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Np4+ atoms. In the fifth F1- site, F1- is bonded in a distorted linear geometry to two equivalent Np4+ atoms. In the sixth F1- site, F1- is bonded in a bent 150 degrees geometry to two Np4+ atoms. In the seventh F1- site, F1- is bonded in a linear geometry to two equivalent Np4+ atoms.