Materials Data on Mn9Al4V3 by Materials Project

V3Mn9Al4 is Heusler-like structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are two inequivalent V sites. In the first V site, V is bonded in a body-centered cubic geometry to eight Mn atoms. There are a spread of V–Mn bond distances ranging from 2.51–2.53 Å. In the second V site, V is bonded in a body-centered cubic geometry to eight Mn atoms. There are two shorter (2.51 Å) and six longer (2.52 Å) V–Mn bond lengths. There are five inequivalent Mn sites. In the first Mn site, Mn is bonded in a body-centered cubic geometry to four V and four Al atoms. There are three shorter (2.52 Å) and one longer (2.54 Å) Mn–Al bond lengths. In the second Mn site, Mn is bonded in a body-centered cubic geometry to four V and four equivalent Al atoms. All Mn–Al bond lengths are 2.52 Å. In the third Mn site, Mn is bonded in a distorted body-centered cubic geometry to three equivalent V, one Mn, and four Al atoms. The Mn–Mn bond length is 2.50 Å. All Mn–Al bond lengths are 2.52 Å. In the fourth Mn site, Mn is bonded in a distorted body-centered cubic geometry to one V, three equivalent Mn, and four equivalent Al atoms. All Mn–Mn bond lengths are 2.51 Å. There are one shorter (2.49 Å) and three longer (2.51 Å) Mn–Al bond lengths. In the fifth Mn site, Mn is bonded in a distorted body-centered cubic geometry to eight Mn and six equivalent Al atoms. All Mn–Al bond lengths are 2.89 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded in a body-centered cubic geometry to eight Mn atoms. In the second Al site, Al is bonded in a distorted body-centered cubic geometry to eleven Mn atoms.