“…However, the lattice parameters of these structures, C11 b , C40 and C54, have never been studied in detail through the wide composition range of Mo(Si,Al) 2 , despite the significance of this property as one of fundamental physical parameters of the material. Also, with respect to C40-and C54-type Mo(Si,Al) 2 , no thermal expansion data have been reported to date, though their mechanical properties, deformation mechanisms [13][14][15][16] and oxidation behavior [1-3, 17,18] have been extensively described.…”