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2005
Niobium
I 5100
21- 024
A New and Industrially Favorable Method for Synthesizing Sandia Octahedral
Molecular Sieve (SOMS-1) Na2Nb 1.6Ti0.4 O5.6(OH)0.4·H2O: Synthesis, Structure, and
Scale-up. — The title compound is synthesized hydrothermally from mixtures of
Nb2O5, TiO2, NaOH, and H2O (autoclave, 170 °C, 103 h). The samples are characterized by powder XRD and SEM. The material can potentially be used for separation of
radioactive 90Sr from aqueous nuclear wastes and contaminated groundwater. Upon
heating, the Sr-exchanged phases dehydrate and convert to thermally stable and chemically durable perovskites which may serve as permanent ceramic host structures for
90
Sr in radioactive waste management. — (NENOFF*, T. M.; PLESS, J. D.;
MICHAELS, E.; PHILLIPS, M. L. F.; Chem. Mater. 17 (2005) 5, 950-952; Chem.
Biol. Technol., Sandia Natl. Lab., Albuquerque, NM 87185, USA; Eng.) —
W. Pewestorf
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