Materials Data on Np3B by Materials Project
Np3B is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are two inequivalent Np sites. In the first Np site, Np is bonded to four equivalent Np and four equivalent B atoms to form a mixture of distorted edge, corner, and face-sharing NpNp4B4 tetrahedra. All Np–Np bond lengths are 2.71 Å. All Np–B bond lengths are 2.71 Å. In the second Np site, Np is bonded in a 8-coordinate geometry to eight equivalent Np and six equivalent B atoms. All Np–B bond lengths are 3.12 Å. B is bonded in a distorted body-centered cubic geometry to fourteen Np atoms.
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