The exchange reaction of Na-sodalite with KC1 was studied by means of high-temperature X-ray powder diffraction, ex-situ and in-situ, up to 800 degrees C. The powder data were fully refined with the Rietveld method and showed that a substantial amount of K enters the structure in the same crystallographic position of Na, causing some Cl ions to be displaced from their position. The paper shows that sodalite is a potentially good matrix for trapping alkaline metal ions from the electrorefining process of nuclear waste and proposes a method to quickly estimate the amount of K in the structure.
Structural characterisation of high temperature K-exchanged sodalite / M. Dapiaggi, G. Artioli, C. Mazzocchia, M. Merlini. - In: ZEITSCHRIFT FUR KRISTALLOGRAPHIE. - ISSN 0044-2968. - 2006:Suppl 23(2006), pp. 437-442. [10.1524/zksu.2006.suppl_23.437]
Structural characterisation of high temperature K-exchanged sodalite
M. DapiaggiPrimo
;G. ArtioliSecondo
;M. MerliniUltimo
2006
Abstract
The exchange reaction of Na-sodalite with KC1 was studied by means of high-temperature X-ray powder diffraction, ex-situ and in-situ, up to 800 degrees C. The powder data were fully refined with the Rietveld method and showed that a substantial amount of K enters the structure in the same crystallographic position of Na, causing some Cl ions to be displaced from their position. The paper shows that sodalite is a potentially good matrix for trapping alkaline metal ions from the electrorefining process of nuclear waste and proposes a method to quickly estimate the amount of K in the structure.Pubblicazioni consigliate
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