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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NpAl4 by Materials Project

NpAl4 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Np is bonded in a 11-coordinate geometry to thirteen Al atoms. There are a spread of Np–Al bond distances ranging from 3.03–3.13 Å. There are three inequivalent Al sites. In the first Al site, Al is bonded in a 10-coordinate geometry to three equivalent Np and seven Al atoms. There are a spread of Al–Al bond distances ranging from 2.62–2.95 Å. In the second Al site, Al is bonded to four equivalent Np and eight Al atoms to form a mixture of distorted face, edge, and corner-sharing AlNp4Al8 cuboctahedra. There are two shorter (3.07 Å) and four longer (3.12 Å) Al–Al bond lengths. In the third Al site, Al is bonded in a 3-coordinate geometry to three equivalent Np and ten Al atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpAl2 by Materials Project

NpAl2 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 four equivalent Np and twelve equivalent Al atoms. All Np–Np bond lengths are 3.36 Å. All Np–Al bond lengths are 3.21 Å. Al is bonded to six equivalent Np and six equivalent Al atoms to form a mixture of corner, edge, and face-sharing AlNp6Al6 cuboctahedra. All Al–Al bond lengths are 2.74 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpAl3 by Materials Project

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.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Np3Al by Materials Project

Np3Al is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Np is bonded to eight equivalent Np and four equivalent Al atoms to form NpNp8Al4 cuboctahedra that share corners with twelve equivalent NpNp8Al4 cuboctahedra, edges with eight equivalent AlNp12 cuboctahedra, edges with sixteen equivalent NpNp8Al4 cuboctahedra, faces with four equivalent AlNp12 cuboctahedra, and faces with fourteen equivalent NpNp8Al4 cuboctahedra. All Np–Np bond lengths are 3.05 Å. All Np–Al bond lengths are 3.05 Å. Al is bonded to twelve equivalent Np atoms to form AlNp12 cuboctahedra that share corners with twelve equivalent AlNp12 cuboctahedra, edges with twenty-four equivalent NpNp8Al4 cuboctahedra, faces with six equivalent AlNp12 cuboctahedra, and faces with twelve equivalent NpNp8Al4 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpAl3 by Materials Project

NpAl3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Np is bonded to twelve equivalent Al atoms to form a mixture of corner and face-sharing NpAl12 cuboctahedra. There are six shorter (3.04 Å) and six longer (3.09 Å) Np–Al bond lengths. Al is bonded in a 10-coordinate geometry to four equivalent Np and six equivalent Al atoms. There are two shorter (2.85 Å) and four longer (2.87 Å) Al–Al bond lengths.

36 MATERIALS SCIENCE↗