Materials Data on Np2Se5 by Materials Project
Np2Se5 crystallizes in the tetragonal P4_2/nmc space group. The structure is three-dimensional. Np5+ is bonded in a 10-coordinate geometry to ten Se2- atoms. There are a spread of Np–Se bond distances ranging from 2.93–3.08 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 4-coordinate geometry to four equivalent Np5+ and two equivalent Se2- atoms. There are one shorter (2.67 Å) and one longer (2.79 Å) Se–Se bond lengths. In the second Se2- site, Se2- is bonded to four equivalent Np5+ atoms to form distorted corner-sharing SeNp4 trigonal pyramids.
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