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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NdOF by Materials Project

NdOF is half-Heusler structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Nd3+ is bonded in a body-centered cubic geometry to four equivalent O2- and four equivalent F1- atoms. All Nd–O bond lengths are 2.45 Å. All Nd–F bond lengths are 2.45 Å. O2- is bonded to four equivalent Nd3+ atoms to form ONd4 tetrahedra that share corners with four equivalent FNd4 tetrahedra, corners with twelve equivalent ONd4 tetrahedra, and edges with six equivalent FNd4 tetrahedra. F1- is bonded to four equivalent Nd3+ atoms to form FNd4 tetrahedra that share corners with four equivalent ONd4 tetrahedra, corners with twelve equivalent FNd4 tetrahedra, and edges with six equivalent ONd4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NdOF by Materials Project

NdOF crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Nd3+ is bonded in a body-centered cubic geometry to four equivalent O2- and four equivalent F1- atoms. All Nd–O bond lengths are 2.38 Å. There are three shorter (2.55 Å) and one longer (2.56 Å) Nd–F bond lengths. O2- is bonded to four equivalent Nd3+ atoms to form distorted ONd4 tetrahedra that share corners with six equivalent ONd4 tetrahedra, corners with ten equivalent FNd4 tetrahedra, edges with three equivalent ONd4 tetrahedra, and edges with three equivalent FNd4 tetrahedra. F1- is bonded to four equivalent Nd3+ atoms to form distorted FNd4 tetrahedra that share corners with six equivalent FNd4 tetrahedra, corners with ten equivalent ONd4 tetrahedra, edges with three equivalent ONd4 tetrahedra, and edges with three equivalent FNd4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd4O3F7 by Materials Project

Nd4O3F7 crystallizes in the monoclinic P2 space group. The structure is three-dimensional. there are two inequivalent Nd sites. In the first Nd site, Nd is bonded in a distorted q6 geometry to three O and six F atoms. There are a spread of Nd–O bond distances ranging from 2.38–2.54 Å. There are a spread of Nd–F bond distances ranging from 2.41–2.56 Å. In the second Nd site, Nd is bonded in a 9-coordinate geometry to three O and six F atoms. There are a spread of Nd–O bond distances ranging from 2.38–2.49 Å. There are a spread of Nd–F bond distances ranging from 2.44–2.67 Å. There are three inequivalent O sites. In the first O site, O is bonded to four Nd atoms to form ONd4 tetrahedra that share corners with eight FNd4 tetrahedra, edges with two equivalent FNd4 tetrahedra, and edges with four ONd4 tetrahedra. In the second O site, O is bonded to four Nd atoms to form ONd4 tetrahedra that share corners with four equivalent ONd4 tetrahedra, corners with four equivalent FNd4 tetrahedra, edges with two equivalent ONd4 tetrahedra, and edges with four FNd4 tetrahedra. In the third O site, O is bonded to four Nd atoms to form ONd4 tetrahedra that share corners with four equivalent ONd4 tetrahedra, corners with eight FNd4 tetrahedra, edges with two equivalent ONd4 tetrahedra, and edges with two equivalent FNd4 tetrahedra. There are five inequivalent F sites. In the first F site, F is bonded to four Nd atoms to form FNd4 tetrahedra that share corners with four equivalent FNd4 tetrahedra, corners with eight ONd4 tetrahedra, edges with two equivalent ONd4 tetrahedra, and edges with two equivalent FNd4 tetrahedra. In the second F site, F is bonded in a trigonal non-coplanar geometry to three Nd atoms. In the third F site, F is bonded to four Nd atoms to form FNd4 tetrahedra that share corners with four equivalent FNd4 tetrahedra, corners with eight ONd4 tetrahedra, edges with two equivalent ONd4 tetrahedra, and edges with two equivalent FNd4 tetrahedra. In the fourth F site, F is bonded in a trigonal non-coplanar geometry to three Nd atoms. In the fifth F site, F is bonded to four Nd atoms to form FNd4 tetrahedra that share corners with four equivalent ONd4 tetrahedra, corners with eight FNd4 tetrahedra, and edges with four ONd4 tetrahedra.

36 MATERIALS SCIENCE↗