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Nyman, May D.; Nenoff, Tina M.; Tripathi, Akhilesh; Parise, John B.; Maxwell, Robert S.; Harrison, William T.A.
Sandia National Labs., Albuquerque, NM (United States); Sandia National Labs., Livermore, CA (United States). Funding organisation: US Department of Energy (United States)2000
Sandia National Labs., Albuquerque, NM (United States); Sandia National Labs., Livermore, CA (United States). Funding organisation: US Department of Energy (United States)2000
AbstractAbstract
[en] The structure of Na16Nb12.8Ti3.2O44.8(OH)3.2 · 8H2O, a member of a new family of Sandia Octahedral Molecular Sieves (SOMS) having a Nb/Na/MIV (M= Ti, Zr) oxide framework and exchangeable Na and water in open channels, was determined from Synchrotron X-ray data. The SOMS phases are isostructural with variable MIV:Nb(1:50--1:4) ratios. The SOMS are extremely selective for sorption of divalent cations, particularly Sr2+. The ion-exchanged SOMS undergo direct thermal conversion to a perovskite-type phase, indicating this is a promising new method for removal and sequestration of radioactive Sr-90 from mixed nuclear wastes
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14 Jul 2000; 21 p; AC04-94AL85000; Also available from OSTI as DE00759984; PURL: https://www.osti.gov/servlets/purl/759984-ULIbfk/webviewable/; Submitted to Science
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ADSORBENTS, ALKALI METAL COMPOUNDS, ALKALINE EARTH ISOTOPES, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CHALCOGENIDES, EVEN-EVEN NUCLEI, INTERMEDIATE MASS NUCLEI, ISOTOPES, MANAGEMENT, MATERIALS, NIOBIUM COMPOUNDS, NUCLEI, OXIDES, OXYGEN COMPOUNDS, PHASE TRANSFORMATIONS, PROCESSING, RADIOACTIVE WASTE MANAGEMENT, RADIOISOTOPES, REFRACTORY METAL COMPOUNDS, SODIUM COMPOUNDS, STRONTIUM ISOTOPES, TITANIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, WASTE MANAGEMENT, WASTE PROCESSING, YEARS LIVING RADIOISOTOPES, ZIRCONIUM COMPOUNDS
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