NpH3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Np(1) is bonded in a 11-coordinate geometry to three equivalent H(1) and eight equivalent H(2) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a trigonal planar geometry to three equivalent Np(1) atoms. In the second H site, H(2) is bonded to four equivalent Np(1) atoms to form a mixture of corner, face, and edge-sharing HNp4 tetrahedra.
NpH3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Np(1) is bonded in a 11-coordinate geometry to three equivalent H(1) and eight equivalent H(2) atoms. All Np(1)-H(1) bond lengths are 2.15 Å. There are two shorter (2.29 Å) and six longer (2.39 Å) Np(1)-H(2) bond lengths. There are two inequivalent H sites. In the first H site, H(1) is bonded in a trigonal planar geometry to three equivalent Np(1) atoms. In the second H site, H(2) is bonded to four equivalent Np(1) atoms to form a mixture of corner, face, and edge-sharing HNp4 tetrahedra.