Local order in the Ni-Ta system

Short-range order in the Ni -Ta system is studied both experimentally (by diffuse scattering of x rays) and theoretically (by the pseudopotential method). The existence of local order is found in the alloy Ni-7 at. % Ta. The short-range order parameter calculated by the pseudopotential method, using Animalu form factors, coincided in sign with that observed experimentally.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 21–25, December, 1976.In conclusion the authors thank Prof. A. A. Katsnel'son for valuable advice and discussions of the results.