Materials Data on Np2S5 by Materials Project
Np2S5 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Np5+ is bonded in a 10-coordinate geometry to ten S2- atoms. There are a spread of Np–S bond distances ranging from 2.77–2.96 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 6-coordinate geometry to four equivalent Np5+ and one S2- atom. The S–S bond length is 2.23 Å. In the second S2- site, S2- is bonded in a 4-coordinate geometry to four equivalent Np5+ atoms. In the third S2- site, S2- is bonded to four equivalent Np5+ atoms to form distorted corner-sharing SNp4 trigonal pyramids.
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