Citation: Thomas E. Albrecht-Schmitt; Philip M. Almond; Richard E. Sykora (2003). Cation-Cation Interactions in Neptunyl(V) Compounds: Hydrothermal Preparation and Structural Characterization of NpO2(IO3) and \a- and \b-AgNpO2(SeO3). Inorganic Chemistry, 42, pp. 3788-3795.