Materials Data on Sm2HfCo16 by Materials Project

Abstract

Sm2HfCo16 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 1-coordinate geometry to one Hf and nineteen Co atoms. The Sm–Hf bond length is 3.13 Å. There are a spread of Sm–Co bond distances ranging from 2.73–3.27 Å. In the second Sm site, Sm is bonded in a 12-coordinate geometry to eighteen Co atoms. There are a spread of Sm–Co bond distances ranging from 2.96–3.27 Å. Hf is bonded in a 1-coordinate geometry to one Sm and thirteen Co atoms. There are a spread of Hf–Co bond distances ranging from 2.41–2.74 Å. There are six inequivalent Co sites. In the first Co site, Co is bonded in a distorted linear geometry to one Sm, one Hf, and twelve Co atoms. There are a spread of Co–Co bond distances ranging from 2.56–2.80 Å. In the second Co site, Co is bonded in a 12-coordinate geometry to two Sm, one Hf, and nine Co atoms. There are a spread of Co–Co bond distances ranging from 2.43–2.59 Å. In the third Co site, Co is bonded to two equivalent Sm and ten Co atoms to form CoSm2Co10 cuboctahedra that share corners with ten CoSm3Co9 cuboctahedra, edges with six CoSm3Co9 cuboctahedra, and faces with eight CoSm2Co10 cuboctahedra. All Co–Co bond lengths are 2.44 Å. In the fourth Co site, Co is bonded in a 12-coordinate geometry to two equivalent Sm, two equivalent Hf, and eight Co atoms. All Co–Co bond lengths are 2.47 Å. In the fifth Co site, Co is bonded to three Sm and nine Co atoms to form a mixture of distorted edge, corner, and face-sharing CoSm3Co9 cuboctahedra. Both Co–Co bond lengths are 2.45 Å. In the sixth Co site, Co is bonded to three Sm, one Hf, and eight Co atoms to form distorted CoSm3HfCo8 cuboctahedra that share corners with thirteen CoSm2Co10 cuboctahedra, edges with seven CoSm2Co10 cuboctahedra, and faces with eight CoSm3Co9 cuboctahedra. Both Co–Co bond lengths are 2.41 Å.