Issue 42, 2014

Crystal chemical characteristics of ellestadite-type apatite: implications for toxic metal immobilization

Abstract

The ellestadite apatites Ca10[(SiO4)x(PO4)6−2x(SO4)x]Cl2 were studied by powder X-ray and neutron diffraction to establish baseline crystallographic data. These synthetic materials, unlike mineral specimens that are well equilibrated, show no Si/P/S ordering and conform to P63/m symmetry. Phosphate-rich ellestadites where 0 ≤ x ≤ 1 show chemical stability towards Toxicity Characterization Leaching Procedure (TCLP) testing and are potential immobilization matrices for mixed toxic metal wastes.

Graphical abstract: Crystal chemical characteristics of ellestadite-type apatite: implications for toxic metal immobilization

Supplementary files

Article information

Article type
Paper
Submitted
10 Jul 2014
Accepted
27 Aug 2014
First published
29 Aug 2014

Dalton Trans., 2014,43, 16031-16043

Author version available

Crystal chemical characteristics of ellestadite-type apatite: implications for toxic metal immobilization

Y. N. Fang, C. Ritter and T. J. White, Dalton Trans., 2014, 43, 16031 DOI: 10.1039/C4DT02088J

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