MgY2 is beta-derived structured and crystallizes in the monoclinic C2/c space group. Mg(1) is bonded to two equivalent Mg(1) and ten Y(1,1) atoms to form distorted MgY10Mg2 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with eight Y(1,1)Y7Mg5 cuboctahedra; edges with ten equivalent Mg(1)Y10Mg2 cuboctahedra; faces with four equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with sixteen Y(1,1)Y7Mg5 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. In the second Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra.
MgY2 is beta-derived structured and crystallizes in the monoclinic C2/c space group. Mg(1) is bonded to two equivalent Mg(1) and ten Y(1,1) atoms to form distorted MgY10Mg2 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with eight Y(1,1)Y7Mg5 cuboctahedra; edges with ten equivalent Mg(1)Y10Mg2 cuboctahedra; faces with four equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with sixteen Y(1,1)Y7Mg5 cuboctahedra. Both Mg(1)-Mg(1) bond lengths are 3.49 Å. There are a spread of Mg(1)-Y(1,1) bond distances ranging from 3.39-3.55 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. There are a spread of Y(1)-Y(1,1) bond distances ranging from 3.43-3.57 Å. In the second Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. There are a spread of Y(1)-Y(1) bond distances ranging from 3.45-3.57 Å.