Materials Data on Np3H by Materials Project
Np3H crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Np sites. In the first Np site, Np is bonded in a 10-coordinate geometry to six Np and four equivalent H atoms. There are three shorter (2.46 Å) and three longer (2.80 Å) Np–Np bond lengths. There are three shorter (2.80 Å) and one longer (2.92 Å) Np–H bond lengths. In the second Np site, Np is bonded in a trigonal planar geometry to six equivalent Np and three equivalent H atoms. All Np–H bond lengths are 2.17 Å. H is bonded in a distorted trigonal planar geometry to eleven Np atoms.
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