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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Mn2AlCr by Materials Project

Mn2CrAl is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cr is bonded in a body-centered cubic geometry to eight equivalent Mn atoms. All Cr–Mn bond lengths are 2.48 Å. Mn is bonded in a body-centered cubic geometry to four equivalent Cr and four equivalent Al atoms. All Mn–Al bond lengths are 2.48 Å. Al is bonded in a distorted body-centered cubic geometry to eight equivalent Mn atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MnAl2Cr3 by Materials Project

Cr3MnAl2 crystallizes in the tetragonal P4mm space group. The structure is three-dimensional. there are three inequivalent Cr sites. In the first Cr site, Cr is bonded in a 8-coordinate geometry to four equivalent Cr and five Al atoms. All Cr–Cr bond lengths are 2.36 Å. There are four shorter (2.62 Å) and one longer (2.76 Å) Cr–Al bond lengths. In the second Cr site, Cr is bonded in a 8-coordinate geometry to four equivalent Mn and five Al atoms. All Cr–Mn bond lengths are 2.39 Å. There are four shorter (2.60 Å) and one longer (2.75 Å) Cr–Al bond lengths. In the third Cr site, Cr is bonded in a 8-coordinate geometry to four equivalent Cr and five Al atoms. There are four shorter (2.62 Å) and one longer (2.76 Å) Cr–Al bond lengths. Mn is bonded in a 8-coordinate geometry to four equivalent Cr and five Al atoms. There are four shorter (2.57 Å) and one longer (2.79 Å) Mn–Al bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a 8-coordinate geometry to six Cr, four equivalent Mn, and four equivalent Al atoms. All Al–Al bond lengths are 2.92 Å. In the second Al site, Al is bonded in a 8-coordinate geometry to nine Cr, one Mn, and four equivalent Al atoms. All Al–Al bond lengths are 2.92 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MnAl24Cr by Materials Project

CrMnAl24 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Cr is bonded in a cuboctahedral geometry to twelve Al atoms. There are a spread of Cr–Al bond distances ranging from 2.66–2.68 Å. Mn is bonded in a cuboctahedral geometry to twelve Al atoms. All Mn–Al bond lengths are 2.67 Å. There are eight inequivalent Al sites. In the first Al site, Al is bonded in a 11-coordinate geometry to one Mn and ten Al atoms. There are a spread of Al–Al bond distances ranging from 2.76–2.93 Å. In the second Al site, Al is bonded in a 11-coordinate geometry to one Cr and ten Al atoms. There are a spread of Al–Al bond distances ranging from 2.76–2.93 Å. In the third Al site, Al is bonded in a 11-coordinate geometry to one Cr and ten Al atoms. There are a spread of Al–Al bond distances ranging from 2.77–2.93 Å. In the fourth Al site, Al is bonded in a 11-coordinate geometry to one Mn and ten Al atoms. There are a spread of Al–Al bond distances ranging from 2.77–2.82 Å. In the fifth Al site, Al is bonded in a 11-coordinate geometry to one Cr and ten Al atoms. There are one shorter (2.78 Å) and one longer (2.92 Å) Al–Al bond lengths. In the sixth Al site, Al is bonded in a 11-coordinate geometry to one Mn and ten Al atoms. There are one shorter (2.77 Å) and one longer (2.91 Å) Al–Al bond lengths. In the seventh Al site, Al is bonded in a 11-coordinate geometry to one Mn and ten Al atoms. In the eighth Al site, Al is bonded in a 11-coordinate geometry to one Cr and ten Al atoms.

36 MATERIALS SCIENCE↗