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Facile Routes to Th IV , U IV , and Np IV Phosphites and Phosphates
Author(s) -
Villa Eric M.,
Wang Shuao,
Alekseev Evgeny V.,
Depmeier Wulf,
AlbrechtSchmitt Thomas E.
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201100464
Subject(s) - chemistry , neptunium , actinide , crystal structure , nuclear chemistry , yield (engineering) , x ray crystallography , caesium , oxidation state , phosphate , solid state , crystallography , radiochemistry , inorganic chemistry , diffraction , catalysis , organic chemistry , materials science , physics , optics , metallurgy
Three actinide(IV) phosphites and a Np IV phosphate, An IV (HPO 3 ) 2 (H 2 O) 2 (An = Th, U, Np) and Cs[Np(H 1.5 PO 4 )(PO 4 )] 2 , respectively, were synthesized using mild hydrothermal conditions. The first three phases are isotypic and were obtained using similar reaction conditions. Cs[Np(H 1.5 PO 4 )(PO 4 )] 2 was synthesized using an analogous method to that of Np(HPO 3 ) 2 (H 2 O) 2 . However, this fourth phase is quite different in comparison to the other phases in both composition and structure. The structure of Cs[Np(H 1.5 PO 4 )(PO 4 )] 2 is constructed from double layers of neptunium(IV) phosphate with caesium cations in the interlayer region. In contrast, An(HPO 3 ) 2 (H 2 O) 2 (An = Th, U, Np) form dense 3D networks. The actinide contraction is detected in variety of metrics obtained from single‐crystal X‐ray diffraction data. Changes in the oxidation state of the neptunium starting materials yield different products.