Problem 10-7 A Hull/Debye-Scherrer pattern is made with CuK radiation of AuCu3 quenched from a temperature T1. The ratio of the integrated intensity of the 420 line to that of the 421 line is found to be 4.38 . Calculate the value of the long-range order parameter S at temperature T1. (Take the lattice parameter of AuCu3 as 3.75 A. Ignore the small difference between Lorentz-polarization factors for these two lines and the corrections to the atomic scattering factors mentioned in section 10-10.) (Hints: The lattice parameter is given in this problem only to establish the lattice symmetry. If you have the second edition you will find pertinent content in Chapter 13.)