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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on ErFe4B by Materials Project

ErFe4B crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 6-coordinate geometry to six equivalent Fe atoms. There are two shorter (2.89 Å) and four longer (2.91 Å) Er–Fe bond lengths. In the second Er site, Er is bonded in a 8-coordinate geometry to twelve Fe and six equivalent B atoms. There are eight shorter (2.93 Å) and four longer (2.94 Å) Er–Fe bond lengths. There are four shorter (2.90 Å) and two longer (2.91 Å) Er–B bond lengths. There are three inequivalent Fe sites. In the first Fe site, Fe is bonded in a 12-coordinate geometry to three equivalent Er and six Fe atoms. There are two shorter (2.47 Å) and four longer (2.48 Å) Fe–Fe bond lengths. In the second Fe site, Fe is bonded in a distorted L-shaped geometry to two equivalent Er, two equivalent Fe, and two equivalent B atoms. Both Fe–B bond lengths are 2.09 Å. In the third Fe site, Fe is bonded in a distorted L-shaped geometry to two equivalent Er, two equivalent Fe, and two equivalent B atoms. Both Fe–B bond lengths are 2.09 Å. B is bonded in a 6-coordinate geometry to three equivalent Er and six Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Er(FeB)2 by Materials Project

Er(FeB)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Er is bonded in a 8-coordinate geometry to eight equivalent Fe and eight equivalent B atoms. All Er–Fe bond lengths are 2.93 Å. All Er–B bond lengths are 2.93 Å. Fe is bonded in a 4-coordinate geometry to four equivalent Er and four equivalent B atoms. All Fe–B bond lengths are 2.00 Å. B is bonded in a 4-coordinate geometry to four equivalent Er and four equivalent Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Er3FeB7 by Materials Project

Er3FeB7 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 11-coordinate geometry to eleven B atoms. There are a spread of Er–B bond distances ranging from 2.59–2.69 Å. In the second Er site, Er is bonded in a 12-coordinate geometry to ten B atoms. There are a spread of Er–B bond distances ranging from 2.61–2.66 Å. Fe is bonded in a 10-coordinate geometry to ten B atoms. All Fe–B bond lengths are 2.26 Å. There are four inequivalent B sites. In the first B site, B is bonded in a 9-coordinate geometry to six Er and three B atoms. There is one shorter (1.88 Å) and two longer (1.94 Å) B–B bond length. In the second B site, B is bonded in a 9-coordinate geometry to four Er, two equivalent Fe, and three B atoms. There is one shorter (1.77 Å) and one longer (1.79 Å) B–B bond length. In the third B site, B is bonded in a 9-coordinate geometry to four equivalent Er, two equivalent Fe, and three B atoms. There is one shorter (1.71 Å) and one longer (1.93 Å) B–B bond length. In the fourth B site, B is bonded in a 2-coordinate geometry to four equivalent Er, two equivalent Fe, and two equivalent B atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ErFeB4 by Materials Project

ErFeB4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Er3+ is bonded in a 4-coordinate geometry to fourteen B+1.50- atoms. There are a spread of Er–B bond distances ranging from 2.56–2.68 Å. Fe3+ is bonded in a 10-coordinate geometry to ten B+1.50- atoms. There are a spread of Fe–B bond distances ranging from 2.18–2.27 Å. There are four inequivalent B+1.50- sites. In the first B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Er3+, two equivalent Fe3+, and three B+1.50- atoms. There are a spread of B–B bond distances ranging from 1.78–1.82 Å. In the second B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Er3+, two equivalent Fe3+, and three B+1.50- atoms. There is one shorter (1.71 Å) and one longer (1.77 Å) B–B bond length. In the third B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to two equivalent Er3+, four equivalent Fe3+, and three B+1.50- atoms. There is one shorter (1.66 Å) and one longer (1.71 Å) B–B bond length. In the fourth B+1.50- site, B+1.50- is bonded in a 9-coordinate geometry to four equivalent Er3+, two equivalent Fe3+, and three B+1.50- atoms.

36 MATERIALS SCIENCE↗