Be3Ir is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to four equivalent Be(1), four equivalent Be(2), and four equivalent Ir(1) atoms to form distorted BeBe8Ir4 cuboctahedra that share corners with twelve equivalent Be(1)Be8Ir4 cuboctahedra, edges with eight equivalent Be(1)Be8Ir4 cuboctahedra, edges with eight equivalent Ir(1)Be12 cuboctahedra, faces with four equivalent Ir(1)Be12 cuboctahedra, and faces with ten equivalent Be(1)Be8Ir4 cuboctahedra. In the second Be site, Be(2) is bonded in a square co-planar geometry to eight equivalent Be(1) and four equivalent Ir(1) atoms. Ir(1) is bonded to four equivalent Be(2) and eight equivalent Be(1) atoms to form IrBe12 cuboctahedra that share corners with four equivalent Ir(1)Be12 cuboctahedra, edges with eight equivalent Ir(1)Be12 cuboctahedra, edges with sixteen equivalent Be(1)Be8Ir4 cuboctahedra, faces with four equivalent Ir(1)Be12 cuboctahedra, and faces with eight equivalent Be(1)Be8Ir4 cuboctahedra.
Be3Ir is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to four equivalent Be(1), four equivalent Be(2), and four equivalent Ir(1) atoms to form distorted BeBe8Ir4 cuboctahedra that share corners with twelve equivalent Be(1)Be8Ir4 cuboctahedra, edges with eight equivalent Be(1)Be8Ir4 cuboctahedra, edges with eight equivalent Ir(1)Be12 cuboctahedra, faces with four equivalent Ir(1)Be12 cuboctahedra, and faces with ten equivalent Be(1)Be8Ir4 cuboctahedra. All Be(1)-Be(1) bond lengths are 2.31 Å. All Be(1)-Be(2) bond lengths are 2.44 Å. All Be(1)-Ir(1) bond lengths are 2.44 Å. In the second Be site, Be(2) is bonded in a square co-planar geometry to eight equivalent Be(1) and four equivalent Ir(1) atoms. All Be(2)-Ir(1) bond lengths are 2.31 Å. Ir(1) is bonded to four equivalent Be(2) and eight equivalent Be(1) atoms to form IrBe12 cuboctahedra that share corners with four equivalent Ir(1)Be12 cuboctahedra, edges with eight equivalent Ir(1)Be12 cuboctahedra, edges with sixteen equivalent Be(1)Be8Ir4 cuboctahedra, faces with four equivalent Ir(1)Be12 cuboctahedra, and faces with eight equivalent Be(1)Be8Ir4 cuboctahedra.