Neptunium Diverges Sharply from Uranium and Plutonium in Crystalline Borate Matrixes: Insights into the Complex Behavior of the Early Actinides Relevant to Nuclear Waste Storage

Not like the others: In contrast to uranium and plutonium borates, neptunium borates are mixed-valent and simultaneously display three coordination environments and three oxidation states (see picture; polyhedra: NpIV light blue, NpV dark blue, NpVI green, B yellow; spheres: O red, K or Ba blue). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.