title: New neptunium(V) borates that exhibit the alexandrite effect.
abstract: A new neptunium(V) borate, K[(NpO(2))B(10)O(14)(OH)(4)], was synthesized using boric acid as a reactive flux. The compound possesses a layered structure in which Np(V) resides in triangular holes, creating a hexagonal-bipyramidal environment around neptunium. This compound is unusual in that it exhibits the Alexandrite effect, a property that is typically restricted to neptunium(IV) compounds.
authors.affiliation: Department of Civil Engineering and Geological Sciences, 156 Fitzpatrick Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA.
authors.forename: Shuao
authors.initials: S
authors.lastname: Wang
authors.forename: Evgeny V
authors.initials: EV
authors.lastname: Alekseev
authors.forename: Wulf
authors.initials: W
authors.lastname: Depmeier
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Albrecht-Schmitt