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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 K3YF6 by Materials Project

K3YF6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to seven F1- atoms. There are a spread of K–F bond distances ranging from 2.67–3.17 Å. In the second K1+ site, K1+ is bonded to six F1- atoms to form KF6 octahedra that share corners with six equivalent YF6 octahedra. The corner-sharing octahedra tilt angles range from 32–41°. There are a spread of K–F bond distances ranging from 2.61–2.70 Å. Y3+ is bonded to six F1- atoms to form YF6 octahedra that share corners with six equivalent KF6 octahedra. The corner-sharing octahedra tilt angles range from 32–41°. There are a spread of Y–F bond distances ranging from 2.19–2.21 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one Y3+ atom. In the second F1- site, F1- is bonded in a 4-coordinate geometry to three K1+ and one Y3+ atom. In the third F1- site, F1- is bonded in a 5-coordinate geometry to four K1+ and one Y3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2YF5 by Materials Project

K2YF5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of K–F bond distances ranging from 2.68–2.92 Å. Y3+ is bonded to seven F1- atoms to form distorted edge-sharing YF7 pentagonal bipyramids. There are a spread of Y–F bond distances ranging from 2.21–2.31 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a 4-coordinate geometry to two equivalent K1+ and two equivalent Y3+ atoms. In the second F1- site, F1- is bonded in a 1-coordinate geometry to four equivalent K1+ and one Y3+ atom. In the third F1- site, F1- is bonded in a 5-coordinate geometry to four equivalent K1+ and one Y3+ atom. In the fourth F1- site, F1- is bonded in a 5-coordinate geometry to four equivalent K1+ and one Y3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KY3F10 by Materials Project

KY3F10 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to sixteen F1- atoms to form distorted edge-sharing KF16 tetrahedra. There are four shorter (2.81 Å) and twelve longer (3.25 Å) K–F bond lengths. Y3+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are four shorter (2.23 Å) and four longer (2.39 Å) Y–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded to one K1+ and three equivalent Y3+ atoms to form a mixture of distorted edge and corner-sharing FKY3 tetrahedra. In the second F1- site, F1- is bonded in a bent 150 degrees geometry to two equivalent K1+ and two equivalent Y3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KY3F10 by Materials Project

KY3F10 crystallizes in the trigonal R3m space group. The structure is three-dimensional. K1+ is bonded in a 7-coordinate geometry to seven F1- atoms. There are one shorter (2.75 Å) and six longer (3.00 Å) K–F bond lengths. Y3+ is bonded to seven F1- atoms to form distorted corner-sharing YF7 pentagonal bipyramids. There are a spread of Y–F bond distances ranging from 2.17–2.67 Å. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two equivalent Y3+ atoms. In the second F1- site, F1- is bonded in a trigonal pyramidal geometry to one K1+ and three equivalent Y3+ atoms. In the third F1- site, F1- is bonded in a linear geometry to two equivalent Y3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3YF6 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗