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NpRu2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Np is bonded in a 12-coordinate geometry to twelve equivalent Ru atoms. All Np–Ru bond lengths are 3.07 Å. Ru is bonded to six equivalent Np and six equivalent Ru atoms to form a mixture of edge, corner, and face-sharing RuNp6Ru6 cuboctahedra. All Ru–Ru bond lengths are 2.62 Å.
NpRh3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to twelve equivalent Rh atoms to form a mixture of face and corner-sharing NpRh12 cuboctahedra. All Np–Rh bond lengths are 2.83 Å. Rh is bonded in a distorted square co-planar geometry to four equivalent Np atoms.
NpNi2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Np is bonded in a 12-coordinate geometry to twelve equivalent Ni atoms. All Np–Ni bond lengths are 2.87 Å. Ni is bonded to six equivalent Np and six equivalent Ni atoms to form a mixture of corner, edge, and face-sharing NiNp6Ni6 cuboctahedra. All Ni–Ni bond lengths are 2.45 Å.
NpTe is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded in a body-centered cubic geometry to eight equivalent Te atoms. All Np–Te bond lengths are 3.27 Å. Te is bonded in a body-centered cubic geometry to eight equivalent Np atoms.
NpGe3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to twelve equivalent Ge atoms to form a mixture of corner and face-sharing NpGe12 cuboctahedra. All Np–Ge bond lengths are 2.99 Å. Ge is bonded in a distorted square co-planar geometry to four equivalent Np atoms.
NpSi crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Np4+ is bonded in a 8-coordinate geometry to two equivalent Np4+ and six equivalent Si4- atoms. Both Np–Np bond lengths are 2.57 Å. There are a spread of Np–Si bond distances ranging from 2.89–3.03 Å. Si4- is bonded in a 10-coordinate geometry to six equivalent Np4+ and four equivalent Si4- atoms. There are two shorter (2.50 Å) and two longer (2.57 Å) Si–Si bond lengths.
NpGa3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to twelve equivalent Ga atoms to form NpGa12 cuboctahedra that share corners with twelve equivalent NpGa12 cuboctahedra, edges with twenty-four equivalent GaNp4Ga8 cuboctahedra, faces with six equivalent NpGa12 cuboctahedra, and faces with twelve equivalent GaNp4Ga8 cuboctahedra. All Np–Ga bond lengths are 3.02 Å. Ga is bonded to four equivalent Np and eight equivalent Ga atoms to form distorted GaNp4Ga8 cuboctahedra that share corners with twelve equivalent GaNp4Ga8 cuboctahedra, edges with eight equivalent NpGa12 cuboctahedra, edges with sixteen equivalent GaNp4Ga8 cuboctahedra, faces with four equivalent NpGa12 cuboctahedra, and faces with fourteen equivalent GaNp4Ga8 cuboctahedra. All Ga–Ga bond lengths are 3.02 Å.
NpSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Np is bonded to twelve equivalent Si atoms to form a mixture of face and edge-sharing NpSi12 cuboctahedra. There are eight shorter (3.02 Å) and four longer (3.10 Å) Np–Si bond lengths. Si is bonded in a 9-coordinate geometry to six equivalent Np and three equivalent Si atoms. There are two shorter (2.31 Å) and one longer (2.34 Å) Si–Si bond lengths.
NpIn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to twelve equivalent In atoms to form NpIn12 cuboctahedra that share corners with twelve equivalent NpIn12 cuboctahedra, edges with twenty-four equivalent InNp4In8 cuboctahedra, faces with six equivalent NpIn12 cuboctahedra, and faces with twelve equivalent InNp4In8 cuboctahedra. All Np–In bond lengths are 3.29 Å. In is bonded to four equivalent Np and eight equivalent In atoms to form distorted InNp4In8 cuboctahedra that share corners with twelve equivalent InNp4In8 cuboctahedra, edges with eight equivalent NpIn12 cuboctahedra, edges with sixteen equivalent InNp4In8 cuboctahedra, faces with four equivalent NpIn12 cuboctahedra, and faces with fourteen equivalent InNp4In8 cuboctahedra. All In–In bond lengths are 3.29 Å.
NpIr2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Np is bonded in a 12-coordinate geometry to twelve equivalent Ir atoms. All Np–Ir bond lengths are 3.10 Å. Ir is bonded to six equivalent Np and six equivalent Ir atoms to form a mixture of edge, face, and corner-sharing IrNp6Ir6 cuboctahedra. All Ir–Ir bond lengths are 2.64 Å.
NpBi is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Np is bonded to six equivalent Bi atoms to form a mixture of edge and corner-sharing NpBi6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Np–Bi bond lengths are 3.19 Å. Bi is bonded to six equivalent Np atoms to form a mixture of edge and corner-sharing BiNp6 octahedra. The corner-sharing octahedral tilt angles are 0°.
NpPd3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to twelve equivalent Pd atoms to form a mixture of face and corner-sharing NpPd12 cuboctahedra. All Np–Pd bond lengths are 2.93 Å. Pd is bonded in a distorted square co-planar geometry to four equivalent Np atoms.
NpH2 is Fluorite structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Np is bonded in a body-centered cubic geometry to eight equivalent H atoms. All Np–H bond lengths are 2.26 Å. H is bonded to four equivalent Np atoms to form a mixture of edge and corner-sharing HNp4 tetrahedra.
NpAl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to twelve equivalent Al atoms to form NpAl12 cuboctahedra that share corners with twelve equivalent NpAl12 cuboctahedra, edges with twenty-four equivalent AlNp4Al8 cuboctahedra, faces with six equivalent NpAl12 cuboctahedra, and faces with twelve equivalent AlNp4Al8 cuboctahedra. All Np–Al bond lengths are 3.01 Å. Al is bonded to four equivalent Np and eight equivalent Al atoms to form AlNp4Al8 cuboctahedra that share corners with twelve equivalent AlNp4Al8 cuboctahedra, edges with eight equivalent NpAl12 cuboctahedra, edges with sixteen equivalent AlNp4Al8 cuboctahedra, faces with four equivalent NpAl12 cuboctahedra, and faces with fourteen equivalent AlNp4Al8 cuboctahedra. All Al–Al bond lengths are 3.01 Å.
NpBe13 crystallizes in the cubic Fm-3c space group. The structure is three-dimensional. there are two inequivalent Be sites. In the first Be site, Be is bonded to twelve equivalent Be atoms to form a mixture of face and corner-sharing BeBe12 cuboctahedra. All Be–Be bond lengths are 2.14 Å. In the second Be site, Be is bonded to ten Be and two equivalent Np atoms to form distorted BeNp2Be10 cuboctahedra that share corners with twenty-eight BeBe12 cuboctahedra, edges with eight equivalent BeNp2Be10 cuboctahedra, and faces with twenty-five BeBe12 cuboctahedra. There are a spread of Be–Be bond distances ranging from 2.22–2.34 Å. Both Be–Np bond lengths are 2.99 Å. Np is bonded in a 1-coordinate geometry to twenty-four equivalent Be atoms.
NpCo2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Np is bonded in a 12-coordinate geometry to twelve equivalent Co atoms. All Np–Co bond lengths are 2.88 Å. Co is bonded to six equivalent Np and six equivalent Co atoms to form a mixture of corner, edge, and face-sharing CoNp6Co6 cuboctahedra. All Co–Co bond lengths are 2.46 Å.
Np3Te4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Np is bonded to eight equivalent Te atoms to form a mixture of distorted face, edge, and corner-sharing NpTe8 hexagonal bipyramids. There are four shorter (3.15 Å) and four longer (3.30 Å) Np–Te bond lengths. Te is bonded to six equivalent Np atoms to form a mixture of distorted face, edge, and corner-sharing TeNp6 octahedra. The corner-sharing octahedra tilt angles range from 17–50°.
Np3Se4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Np is bonded to eight equivalent Se atoms to form a mixture of distorted edge, face, and corner-sharing NpSe8 hexagonal bipyramids. There are four shorter (2.85 Å) and four longer (2.97 Å) Np–Se bond lengths. Se is bonded to six equivalent Np atoms to form a mixture of distorted edge, face, and corner-sharing SeNp6 octahedra. The corner-sharing octahedra tilt angles range from 16–50°.