High-pressure X-ray diffraction study of the δ-phase in the uranium-neptunium binary system

Abstract
High pressure X-ray diffraction studies were performed at room temperature on a uranium-neptunium binary alloy (U0, 40 Np0.60) using a diamond anvil cell in an energy dispersive facility. The sample maintained its simple cubic phase up to 62 GPa (highest pressure reached in This experiment). The bulk modulus and its pressure derivative were determined to be B0 = 82 (2) GPa and B0′ = 9.4 (1.3), from the experimental data in the pressure range 0–20 GPa. The present results are compared with those obtained by the same techniques used for uranium and neptunium.