The elastic moduli as the isothermal elastic modulus BT , the adiabatic elastic modulus BS, the Young modulus E, the bulk modulus G, the rigidity modulus K, the elastic constants C11, C12, C44, the longitudinal and transverse wave velocities vl and vt for crystals with face-centered cubic (FCC) structure are derived by the statistical moment method. The numerical results are applied to N2 and CO molecular cryocrystals and are compared with the experimental data. |