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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 YWN3 by Materials Project

YWN3 crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. Y3+ is bonded in a 8-coordinate geometry to eight N3- atoms. There are a spread of Y–N bond distances ranging from 2.33–2.69 Å. W6+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of W–N bond distances ranging from 1.82–2.40 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a 5-coordinate geometry to four equivalent Y3+ and one W6+ atom. In the second N3- site, N3- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Y3+ and two equivalent W6+ atoms. In the third N3- site, N3- is bonded to two equivalent Y3+ and two equivalent W6+ atoms to form distorted corner-sharing NY2W2 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YWN3 by Materials Project

YWN3 is Ilmenite-like structured and crystallizes in the trigonal R3c space group. The structure is three-dimensional. Y3+ is bonded in a 6-coordinate geometry to six equivalent N3- atoms. There are three shorter (2.37 Å) and three longer (2.50 Å) Y–N bond lengths. W6+ is bonded to six equivalent N3- atoms to form distorted corner-sharing WN6 octahedra. The corner-sharing octahedral tilt angles are 30°. There are three shorter (1.90 Å) and three longer (2.22 Å) W–N bond lengths. N3- is bonded to two equivalent Y3+ and two equivalent W6+ atoms to form a mixture of distorted edge and corner-sharing NY2W2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YWN3 by Materials Project

YWN3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded to six N3- atoms to form distorted YN6 pentagonal pyramids that share corners with four equivalent WN4 tetrahedra, edges with three equivalent YN6 octahedra, and edges with two equivalent WN4 tetrahedra. There are a spread of Y–N bond distances ranging from 2.34–2.50 Å. In the second Y3+ site, Y3+ is bonded to six N3- atoms to form YN6 octahedra that share corners with six equivalent WN4 tetrahedra, edges with two equivalent YN6 octahedra, and edges with three equivalent YN6 pentagonal pyramids. There are a spread of Y–N bond distances ranging from 2.30–2.48 Å. W6+ is bonded to four N3- atoms to form WN4 tetrahedra that share corners with three equivalent YN6 octahedra, corners with two equivalent YN6 pentagonal pyramids, corners with two equivalent WN4 tetrahedra, and an edgeedge with one YN6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 35–67°. There are a spread of W–N bond distances ranging from 1.80–1.95 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a distorted T-shaped geometry to two Y3+ and one W6+ atom. In the second N3- site, N3- is bonded in a 3-coordinate geometry to one Y3+ and two equivalent W6+ atoms. In the third N3- site, N3- is bonded to three Y3+ and one W6+ atom to form a mixture of distorted corner and edge-sharing NY3W tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YWN3 by Materials Project

YWN3 crystallizes in the orthorhombic Ama2 space group. The structure is three-dimensional. Y3+ is bonded to six N3- atoms to form a mixture of distorted corner and edge-sharing YN6 octahedra. The corner-sharing octahedral tilt angles are 62°. There are a spread of Y–N bond distances ranging from 2.31–2.61 Å. W6+ is bonded in a 5-coordinate geometry to five N3- atoms. There are a spread of W–N bond distances ranging from 1.82–2.17 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded to three equivalent Y3+ and one W6+ atom to form distorted NY3W tetrahedra that share corners with six equivalent NY3W tetrahedra, corners with two equivalent NYW3 trigonal pyramids, and edges with two equivalent NYW3 trigonal pyramids. In the second N3- site, N3- is bonded to one Y3+ and three equivalent W6+ atoms to form distorted NYW3 trigonal pyramids that share corners with two equivalent NY3W tetrahedra, corners with two equivalent NYW3 trigonal pyramids, edges with two equivalent NY3W tetrahedra, and edges with two equivalent NYW3 trigonal pyramids. In the third N3- site, N3- is bonded in a trigonal planar geometry to two equivalent Y3+ and one W6+ atom.

36 MATERIALS SCIENCE↗