4.6 Article

Cation substitution in β-tricalcium phosphate investigated using multi-nuclear, solid-state NMR

期刊

JOURNAL OF SOLID STATE CHEMISTRY
卷 212, 期 -, 页码 227-236

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2013.10.026

关键词

Calcium phosphate; Waste immobilisation; Nuclear magnetic resonance; Heteronuclear recoupling; P-31 NMR; Ca-43 NMR

资金

  1. National Science Foundation [DMR-1157490]
  2. State of Florida
  3. U.S. Department of Energy
  4. AWE
  5. EPSRC
  6. BBSRC
  7. University of Warwick
  8. Advantage West Midlands (AWM)
  9. European Regional Development Fund (ERDF)
  10. EPSRC [EP/F017901/1] Funding Source: UKRI
  11. Engineering and Physical Sciences Research Council [EP/F017901/1] Funding Source: researchfish

向作者/读者索取更多资源

The substitution of aluminium, gallium and sodium cations into beta-tricalcium phosphate (beta-TCP; Ca-3(PO4)(2)) has been investigated, and the Ca sites involved successfully determined, using a combination of D-1 P-31, Al-27, Ga-71, Na-23 and Ca-43 (natural abundance) NMR and 2D Al-27{P-31}, Ga-71{P-31} and Na-23{P-31} rotary-resonance-recoupled heteronuclear multiple-quantum correlation (R-3-HMQC) NMR. Over the compositional range studied, substitution of Ca2+ by Al3+ or Ga3+ was observed only on the Ca(5) site, whilst substitution by Na+ was confined to the Ca(4) site. Some AlPO4 or GaPO4 second phase was observed at the highest doping levels in the Al3+ and Ga3+ substituted samples. Crown Copyright (C) 2013 Published by Elsevier Inc. All rights reserved.

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