Materials Data on Np3Si2 by Materials Project
Np3Si2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are two inequivalent Np sites. In the first Np site, Np is bonded in a square co-planar geometry to four equivalent Si atoms. All Np–Si bond lengths are 2.82 Å. In the second Np site, Np is bonded in a 6-coordinate geometry to six equivalent Si atoms. There are two shorter (2.76 Å) and four longer (2.90 Å) Np–Si bond lengths. Si is bonded in a 9-coordinate geometry to eight Np and one Si atom. The Si–Si bond length is 2.32 Å.
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