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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on FeCoB by Materials Project

CoFeB is Khatyrkite-derived structured and crystallizes in the orthorhombic Fmmm space group. The structure is three-dimensional. Fe2+ is bonded in a 7-coordinate geometry to three equivalent Fe2+ and four equivalent B3- atoms. There are one shorter (2.32 Å) and two longer (2.42 Å) Fe–Fe bond lengths. All Fe–B bond lengths are 2.17 Å. Co1+ is bonded in a 4-coordinate geometry to four equivalent B3- atoms. All Co–B bond lengths are 2.14 Å. B3- is bonded in a 10-coordinate geometry to four equivalent Fe2+, four equivalent Co1+, and two equivalent B3- atoms. Both B–B bond lengths are 2.10 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FeCoB2 by Materials Project

FeCoB2 crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. Fe3+ is bonded in a 7-coordinate geometry to seven B3- atoms. There are a spread of Fe–B bond distances ranging from 2.11–2.14 Å. Co3+ is bonded in a 7-coordinate geometry to seven B3- atoms. There are a spread of Co–B bond distances ranging from 2.10–2.14 Å. There are two inequivalent B3- sites. In the first B3- site, B3- is bonded in a 9-coordinate geometry to four equivalent Fe3+, three equivalent Co3+, and two equivalent B3- atoms. Both B–B bond lengths are 1.82 Å. In the second B3- site, B3- is bonded in a 9-coordinate geometry to three equivalent Fe3+, four equivalent Co3+, and two equivalent B3- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Fe3Co3B2 by Materials Project

Fe3Co3B2 is Cementite-derived structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are three inequivalent Fe sites. In the first Fe site, Fe is bonded in a 2-coordinate geometry to three B atoms. There are a spread of Fe–B bond distances ranging from 2.06–2.28 Å. In the second Fe site, Fe is bonded in a 2-coordinate geometry to three equivalent B atoms. There are a spread of Fe–B bond distances ranging from 2.11–2.55 Å. In the third Fe site, Fe is bonded in a 2-coordinate geometry to three equivalent B atoms. There are a spread of Fe–B bond distances ranging from 2.11–2.55 Å. There are three inequivalent Co sites. In the first Co site, Co is bonded in a 2-coordinate geometry to three B atoms. There are a spread of Co–B bond distances ranging from 2.04–2.30 Å. In the second Co site, Co is bonded in a 2-coordinate geometry to three B atoms. There are a spread of Co–B bond distances ranging from 2.04–2.29 Å. In the third Co site, Co is bonded in a 2-coordinate geometry to three B atoms. There are a spread of Co–B bond distances ranging from 2.04–2.29 Å. There are two inequivalent B sites. In the first B site, B is bonded in a 9-coordinate geometry to five Fe and four Co atoms. In the second B site, B is bonded in a 9-coordinate geometry to four Fe and five Co atoms.

36 MATERIALS SCIENCE↗