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|Title:||Crystal chemistry of vanadium-bearing ellestadite waste forms||Authors:||Fang, Yanan
Page, Sam J.
Rees, Gregory J.
Hanna, John V.
White, Tim J.
|Keywords:||Engineering::Materials||Issue Date:||2018||Source:||Fang, Y., Page, S. J., Rees, G. J., Avdeev, M., Hanna, J. V., & White, T. J. (2018). Crystal chemistry of vanadium-bearing ellestadite waste forms. Inorganic chemistry, 57(15), 9122–9132. doi:10.1021/acs.inorgchem.8b01160||Journal:||Inorganic chemistry||Abstract:||Vanadate ellestadites Ca10(SiO4) x(VO4)6-2 x(SO4) xCl2, serving as prototype crystalline matrices for the fixation of pentavalent toxic metals (V, Cr, As), were synthesized and characterized by powder X-ray and neutron diffraction (PXRD and PND), electron probe microanalysis (EPMA), Fourier transform infrared spectroscopy (FTIR), and solid-state nuclear magnetic resonance (SS-NMR). The ellestadites 0.19 < x < 3 adopt the P63/ m structure, while the vanadate endmember Ca10(VO4)6Cl2 is triclinic with space group P1̅. A miscibility gap exists for 0.77 < x < 2.44. The deficiency of Cl in the structure leads to short-range disorder in the tunnel. Toxicity characteristic leaching testing (TCLP) showed the incorporation of vanadium increases ellestadite solubility, and defined a waste loading limit that should not exceed 25 atom % V to ensure small release levels.||URI:||https://hdl.handle.net/10356/142691||ISSN:||0020-1669||DOI:||10.1021/acs.inorgchem.8b01160||Rights:||© 2018 American Chemical Society. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MSE Journal Articles|
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