Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ni-P-W”

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.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NiP3W2 by Materials Project

W2NiP3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent W+3.50+ sites. In the first W+3.50+ site, W+3.50+ is bonded to six P3- atoms to form distorted WP6 octahedra that share corners with four equivalent NiP6 octahedra, corners with eight equivalent WP6 octahedra, edges with two equivalent NiP6 octahedra, edges with four equivalent WP6 octahedra, a faceface with one WP6 octahedra, and a faceface with one NiP6 octahedra. The corner-sharing octahedra tilt angles range from 41–54°. There are a spread of W–P bond distances ranging from 2.45–2.54 Å. In the second W+3.50+ site, W+3.50+ is bonded to six P3- atoms to form WP6 octahedra that share corners with four equivalent NiP6 octahedra, corners with eight equivalent WP6 octahedra, edges with two equivalent NiP6 octahedra, edges with four equivalent WP6 octahedra, a faceface with one WP6 octahedra, and a faceface with one NiP6 octahedra. The corner-sharing octahedra tilt angles range from 41–59°. There are a spread of W–P bond distances ranging from 2.44–2.53 Å. There are two inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to six P3- atoms to form NiP6 octahedra that share corners with four equivalent NiP6 octahedra, corners with eight equivalent WP6 octahedra, edges with two equivalent NiP6 octahedra, edges with four equivalent WP6 octahedra, and faces with two equivalent WP6 octahedra. The corner-sharing octahedra tilt angles range from 45–54°. There are four shorter (2.25 Å) and two longer (2.57 Å) Ni–P bond lengths. In the second Ni2+ site, Ni2+ is bonded to six P3- atoms to form NiP6 octahedra that share corners with four equivalent NiP6 octahedra, corners with eight equivalent WP6 octahedra, edges with two equivalent NiP6 octahedra, edges with four equivalent WP6 octahedra, and faces with two equivalent WP6 octahedra. The corner-sharing octahedra tilt angles range from 45–59°. There are two shorter (2.33 Å) and four longer (2.37 Å) Ni–P bond lengths. There are three inequivalent P3- sites. In the first P3- site, P3- is bonded in a 6-coordinate geometry to four W+3.50+ and two equivalent Ni2+ atoms. In the second P3- site, P3- is bonded in a 6-coordinate geometry to five W+3.50+ and one Ni2+ atom. In the third P3- site, P3- is bonded in a 6-coordinate geometry to three W+3.50+ and three Ni2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni4P16W by Materials Project

WNi4P16 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. W2+ is bonded in a 8-coordinate geometry to eight P+0.50- atoms. There are a spread of W–P bond distances ranging from 2.48–2.53 Å. There are two inequivalent Ni+1.50+ sites. In the first Ni+1.50+ site, Ni+1.50+ is bonded to six P+0.50- atoms to form NiP6 octahedra that share corners with six NiP6 octahedra, corners with eight PNi3P tetrahedra, and an edgeedge with one NiP6 octahedra. The corner-sharing octahedra tilt angles range from 57–66°. There are a spread of Ni–P bond distances ranging from 2.22–2.37 Å. In the second Ni+1.50+ site, Ni+1.50+ is bonded to six P+0.50- atoms to form NiP6 octahedra that share corners with four equivalent NiP6 octahedra and corners with five PNi2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 57–63°. There are a spread of Ni–P bond distances ranging from 2.25–2.34 Å. There are eight inequivalent P+0.50- sites. In the first P+0.50- site, P+0.50- is bonded to two Ni+1.50+ and two P+0.50- atoms to form distorted PNi2P2 tetrahedra that share a cornercorner with one NiP6 octahedra and corners with nine PNi3P tetrahedra. The corner-sharing octahedral tilt angles are 71°. There are one shorter (2.24 Å) and one longer (2.25 Å) P–P bond lengths. In the second P+0.50- site, P+0.50- is bonded to three Ni+1.50+ and one P+0.50- atom to form distorted PNi3P tetrahedra that share corners with two equivalent NiP6 octahedra, corners with eleven PNi2P2 tetrahedra, and an edgeedge with one PNi3P tetrahedra. The corner-sharing octahedra tilt angles range from 73–76°. The P–P bond length is 2.21 Å. In the third P+0.50- site, P+0.50- is bonded to two equivalent Ni+1.50+ and two P+0.50- atoms to form distorted PNi2P2 tetrahedra that share corners with three NiP6 octahedra and corners with twelve PNi2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 70–83°. The P–P bond length is 2.27 Å. In the fourth P+0.50- site, P+0.50- is bonded in a 4-coordinate geometry to one W2+, one Ni+1.50+, and two P+0.50- atoms. There are one shorter (2.25 Å) and one longer (2.26 Å) P–P bond lengths. In the fifth P+0.50- site, P+0.50- is bonded to one W2+ and three P+0.50- atoms to form distorted PP3W tetrahedra that share corners with six NiP6 octahedra and corners with two PNi3P tetrahedra. The corner-sharing octahedra tilt angles range from 58–76°. The P–P bond length is 2.26 Å. In the sixth P+0.50- site, P+0.50- is bonded to two Ni+1.50+ and two P+0.50- atoms to form distorted PNi2P2 tetrahedra that share a cornercorner with one NiP6 octahedra and corners with nine PNi2P2 tetrahedra. The corner-sharing octahedral tilt angles are 72°. The P–P bond length is 2.24 Å. In the seventh P+0.50- site, P+0.50- is bonded in a 4-coordinate geometry to one W2+, one Ni+1.50+, and two P+0.50- atoms. In the eighth P+0.50- site, P+0.50- is bonded in a 4-coordinate geometry to one W2+, one Ni+1.50+, and two P+0.50- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiP8W by Materials Project

WNiP8 crystallizes in the trigonal P-31c space group. The structure is three-dimensional. W6+ is bonded in a body-centered cubic geometry to eight P1- atoms. There are two shorter (2.51 Å) and six longer (2.54 Å) W–P bond lengths. Ni2+ is bonded to six equivalent P1- atoms to form NiP6 octahedra that share corners with six equivalent PP3W tetrahedra. All Ni–P bond lengths are 2.31 Å. There are two inequivalent P1- sites. In the first P1- site, P1- is bonded to one W6+ and three equivalent P1- atoms to form distorted PP3W tetrahedra that share corners with three equivalent NiP6 octahedra and a cornercorner with one PP3W tetrahedra. The corner-sharing octahedral tilt angles are 75°. All P–P bond lengths are 2.25 Å. In the second P1- site, P1- is bonded in a 4-coordinate geometry to one W6+, one Ni2+, and two P1- atoms. The P–P bond length is 2.23 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiPW by Materials Project

NiWP crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. W2+ is bonded to five P3- atoms to form distorted WP5 square pyramids that share corners with ten equivalent WP5 square pyramids, corners with six equivalent NiP4 tetrahedra, edges with six equivalent WP5 square pyramids, and edges with six equivalent NiP4 tetrahedra. There are one shorter (2.42 Å) and four longer (2.58 Å) W–P bond lengths. Ni1+ is bonded to four P3- atoms to form NiP4 tetrahedra that share corners with six equivalent WP5 square pyramids, corners with ten equivalent NiP4 tetrahedra, edges with six equivalent WP5 square pyramids, and edges with two equivalent NiP4 tetrahedra. There are two shorter (2.22 Å) and two longer (2.40 Å) Ni–P bond lengths. There are two inequivalent P3- sites. In the first P3- site, P3- is bonded in a 3-coordinate geometry to six equivalent W2+ and three equivalent Ni1+ atoms. In the second P3- site, P3- is bonded in a distorted q6 geometry to three equivalent W2+ and six equivalent Ni1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiP2W by Materials Project

WNiP2 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. W4+ is bonded to six equivalent P3- atoms to form edge-sharing WP6 octahedra. All W–P bond lengths are 2.49 Å. Ni2+ is bonded in a 6-coordinate geometry to six equivalent P3- atoms. All Ni–P bond lengths are 2.32 Å. P3- is bonded in a 6-coordinate geometry to three equivalent W4+ and three equivalent Ni2+ atoms.

36 MATERIALS SCIENCE↗