The AlCr2 compound crystallises in the MoSi2 tetragonal structure type with space group I4/mmm and lattice parameters a = 0.29984 nm and c = 0.86303 nm [25]. Al3Sc has the space group Pm-3m, with a cubic structure and a lattice parameter a = 0.41030 nm [26]. Al3Cr7 has the space...