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Y2RuNi is Heusler structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Y is bonded in a body-centered cubic geometry to four equivalent Ru and four equivalent Ni atoms. All Y–Ru bond lengths are 2.96 Å. All Y–Ni bond lengths are 2.96 Å. Ru is bonded in a body-centered cubic geometry to eight equivalent Y atoms. Ni is bonded in a body-centered cubic geometry to eight equivalent Y atoms.
Y2Ru3Ni is Cubic Laves-derived structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Y is bonded in a 12-coordinate geometry to nine equivalent Ru and three equivalent Ni atoms. There are six shorter (3.08 Å) and three longer (3.12 Å) Y–Ru bond lengths. All Y–Ni bond lengths are 3.08 Å. Ru is bonded to six equivalent Y, four equivalent Ru, and two equivalent Ni atoms to form RuY6Ni2Ru4 cuboctahedra that share corners with four equivalent NiY6Ru6 cuboctahedra, corners with fourteen equivalent RuY6Ni2Ru4 cuboctahedra, edges with six equivalent RuY6Ni2Ru4 cuboctahedra, faces with six equivalent NiY6Ru6 cuboctahedra, and faces with twelve equivalent RuY6Ni2Ru4 cuboctahedra. All Ru–Ru bond lengths are 2.63 Å. Both Ru–Ni bond lengths are 2.65 Å. Ni is bonded to six equivalent Y and six equivalent Ru atoms to form NiY6Ru6 cuboctahedra that share corners with six equivalent NiY6Ru6 cuboctahedra, corners with twelve equivalent RuY6Ni2Ru4 cuboctahedra, edges with six equivalent NiY6Ru6 cuboctahedra, and faces with eighteen equivalent RuY6Ni2Ru4 cuboctahedra.