Materials Data on Tm6Nb4Al43 by Materials Project

Dataset · Thu Apr 30 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1679305· OSTI ID:1679305

Tm6Nb4Al43 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. Tm is bonded in a 6-coordinate geometry to one Tm, one Nb, and fifteen Al atoms. The Tm–Tm bond length is 3.46 Å. The Tm–Nb bond length is 3.48 Å. There are a spread of Tm–Al bond distances ranging from 3.06–3.47 Å. There are two inequivalent Nb sites. In the first Nb site, Nb is bonded to twelve Al atoms to form NbAl12 cuboctahedra that share corners with six equivalent NbTm2Al10 cuboctahedra and edges with six equivalent AlNb2Al10 cuboctahedra. There are six shorter (2.70 Å) and six longer (2.91 Å) Nb–Al bond lengths. In the second Nb site, Nb is bonded to two equivalent Tm and ten Al atoms to form distorted NbTm2Al10 cuboctahedra that share corners with four NbAl12 cuboctahedra, an edgeedge with one AlNb2Al10 cuboctahedra, and faces with six AlNb2Al10 cuboctahedra. There are a spread of Nb–Al bond distances ranging from 2.65–2.75 Å. There are seven inequivalent Al sites. In the first Al site, Al is bonded in a 12-coordinate geometry to one Tm, two Nb, and nine Al atoms. There are a spread of Al–Al bond distances ranging from 2.76–3.06 Å. In the second Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tm, one Nb, and nine Al atoms. There are a spread of Al–Al bond distances ranging from 2.75–3.05 Å. In the third Al site, Al is bonded in a 12-coordinate geometry to four equivalent Tm and eight Al atoms. There are a spread of Al–Al bond distances ranging from 2.78–3.07 Å. In the fourth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tm, one Nb, and nine Al atoms. There are a spread of Al–Al bond distances ranging from 2.74–3.06 Å. In the fifth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Tm, one Nb, and seven Al atoms. There are two shorter (2.82 Å) and one longer (2.88 Å) Al–Al bond lengths. In the sixth Al site, Al is bonded to two equivalent Nb and ten Al atoms to form distorted AlNb2Al10 cuboctahedra that share corners with four equivalent AlTm3Al9 cuboctahedra, edges with three NbAl12 cuboctahedra, faces with two equivalent NbTm2Al10 cuboctahedra, and faces with two equivalent AlNb2Al10 cuboctahedra. Both Al–Al bond lengths are 2.83 Å. In the seventh Al site, Al is bonded to three equivalent Tm and nine Al atoms to form AlTm3Al9 cuboctahedra that share corners with six AlNb2Al10 cuboctahedra, faces with two equivalent AlTm3Al9 cuboctahedra, and faces with three equivalent NbTm2Al10 cuboctahedra.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1679305
• Report Number(s): mp-1208184
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Al-Nb-Tm
Tm6Nb4Al43
crystal structure