Materials Data on ErMnAl by Materials Project
ErMnAl is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Er is bonded in a 12-coordinate geometry to four equivalent Er, six equivalent Mn, and six equivalent Al atoms. There are two shorter (3.29 Å) and two longer (3.36 Å) Er–Er bond lengths. There are two shorter (3.11 Å) and four longer (3.22 Å) Er–Mn bond lengths. There are four shorter (3.18 Å) and two longer (3.19 Å) Er–Al bond lengths. Mn is bonded to six equivalent Er, two equivalent Mn, and four equivalent Al atoms to form MnEr6Mn2Al4 cuboctahedra that share corners with eight equivalent AlEr6Mn4Al2 cuboctahedra, corners with ten equivalent MnEr6Mn2Al4 cuboctahedra, edges with six equivalent MnEr6Mn2Al4 cuboctahedra, faces with six equivalent MnEr6Mn2Al4 cuboctahedra, and faces with twelve equivalent AlEr6Mn4Al2 cuboctahedra. Both Mn–Mn bond lengths are 2.72 Å. All Mn–Al bond lengths are 2.70 Å. Al is bonded to six equivalent Er, four equivalent Mn, and two equivalent Al atoms to form AlEr6Mn4Al2 cuboctahedra that share corners with eight equivalent MnEr6Mn2Al4 cuboctahedra, corners with ten equivalent AlEr6Mn4Al2 cuboctahedra, edges with six equivalent AlEr6Mn4Al2 cuboctahedra, faces with six equivalent AlEr6Mn4Al2 cuboctahedra, and faces with twelve equivalent MnEr6Mn2Al4 cuboctahedra. Both Al–Al bond lengths are 2.75 Å.