Moderate supercritical synthesis as a facile route to mixed-valent uranium(iv,v) and (v,vi) silicates

Abstract

Mixed-valent uranium(IV,V) and (V,VI) phases represent a unique subset of known uranium compounds. Efforts to develop our current understanding of these materials have pointed to hydrothermal methods as effective preparative techniques. Herein we report the successful use of moderate supercritical conditions for the synthesis of five new U(V) containing phases.