Materials Data on AlSiNi6 by Materials Project
Ni6AlSi crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are three inequivalent Ni sites. In the first Ni site, Ni is bonded to eight equivalent Ni and four equivalent Al atoms to form NiAl4Ni8 cuboctahedra that share corners with twelve NiAl4Ni8 cuboctahedra, edges with eight equivalent SiNi12 cuboctahedra, edges with sixteen equivalent NiAl2Si2Ni8 cuboctahedra, faces with four equivalent AlNi12 cuboctahedra, and faces with fourteen NiAl4Ni8 cuboctahedra. All Ni–Ni bond lengths are 2.52 Å. All Ni–Al bond lengths are 2.49 Å. In the second Ni site, Ni is bonded to eight equivalent Ni and four equivalent Si atoms to form NiSi4Ni8 cuboctahedra that share corners with twelve NiAl4Ni8 cuboctahedra, edges with eight equivalent AlNi12 cuboctahedra, edges with sixteen equivalent NiAl2Si2Ni8 cuboctahedra, faces with four equivalent SiNi12 cuboctahedra, and faces with fourteen NiAl4Ni8 cuboctahedra. All Ni–Ni bond lengths are 2.45 Å. All Ni–Si bond lengths are 2.49 Å. In the third Ni site, Ni is bonded to eight Ni, two equivalent Al, and two equivalent Si atoms to form NiAl2Si2Ni8 cuboctahedra that share corners with twelve equivalent NiAl2Si2Ni8 cuboctahedra, edges with four equivalent AlNi12 cuboctahedra, edges with four equivalent SiNi12 cuboctahedra, edges with sixteen NiAl4Ni8 cuboctahedra, faces with two equivalent AlNi12 cuboctahedra, faces with two equivalent SiNi12 cuboctahedra, and faces with fourteen NiAl4Ni8 cuboctahedra. All Ni–Ni bond lengths are 2.49 Å. Both Ni–Al bond lengths are 2.52 Å. Both Ni–Si bond lengths are 2.45 Å. Al is bonded to twelve Ni atoms to form AlNi12 cuboctahedra that share corners with four equivalent AlNi12 cuboctahedra, corners with eight equivalent SiNi12 cuboctahedra, edges with twenty-four NiSi4Ni8 cuboctahedra, faces with two equivalent SiNi12 cuboctahedra, faces with four equivalent AlNi12 cuboctahedra, and faces with twelve NiAl4Ni8 cuboctahedra. Si is bonded to twelve Ni atoms to form SiNi12 cuboctahedra that share corners with four equivalent SiNi12 cuboctahedra, corners with eight equivalent AlNi12 cuboctahedra, edges with twenty-four NiAl4Ni8 cuboctahedra, faces with two equivalent AlNi12 cuboctahedra, faces with four equivalent SiNi12 cuboctahedra, and faces with twelve NiSi4Ni8 cuboctahedra.