title: Highly porous uranyl selenate nanotubules.
abstract: A first amine-templated uranyl selenate based upon highly porous uranyl selenate nanotubules, (C4H12N)14[(UO2)10(SeO4)17(H2O)], has been prepared in the room-temperature reaction of uranyl nitrate, butylamine, and H2SeO4 in aqueous solution. The structure consists of nanometer-scale tubular [(UO2)10(SeO4)17(H2O)]14- units packed in a hexagonal-type fashion. The tubules have elliptical cross section with outer dimensions of 25 x 23 A = 2.5 x 2.3 nm. The internal free crystallographic diameter of the tubules is 12.6 A = 1.26 nm, which is comparable to the effective pore size in large-pore zeolites. This finding demonstrates the possibility of nanostructures for actinides in higher oxidation states and opens up a new area of research and exploration.
authors.affiliation: Department of Crystallography, St. Petersburg State University, 199034 St. Petersburg, Russia. skrivovi@mail.ru
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Krivovichev
authors.forename: Volker
authors.initials: V
authors.lastname: Kahlenberg
authors.forename: Ivan G
authors.initials: IG
authors.lastname: Tananaev
authors.forename: Reinhard
authors.initials: R
authors.lastname: Kaindl
authors.forename: Edgar
authors.initials: E
authors.lastname: Mersdorf
authors.forename: Boris F
authors.initials: BF
authors.lastname: Myasoedov