Materials Data on NaNp(HO2)2 by Materials Project
NaNp(HO2)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.33–2.78 Å. Np5+ is bonded to seven O2- atoms to form a mixture of distorted edge and corner-sharing NpO7 pentagonal bipyramids. There are a spread of Np–O bond distances ranging from 1.91–2.48 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.97 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two equivalent Na1+ and one Np5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Na1+, two equivalent Np5+, and one H1+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+ and two equivalent Np5+ atoms. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Na1+, two equivalent Np5+, and one H1+ atom.