Laurencin, Danielle and Wong, Alan and Dupree, Ray and Smith, Mark E. (2008) Natural abundance Ca-43 solid-state NMR characterisation of hydroxyapatite: identification of the two calcium sites. Magnetic Resonance in Chemistry, 46 (4). pp. 347-350. ISSN 1097-458XFull text not available from this repository.
Natural abundance 43 Ca solid-state NMR of hydroxyapatite (Ca-10(PO4)(6)(OH)(2)) was performed at three different fields (8.45,14.1 and 18.8 T). The two crystallographically distinct calcium sites of the apatite structure were spectroscopically resolved at 18.8 T. The 43 Ca NMR interaction parameters (delta(iso), C-Q and eta Q) of each site were determined by multiple magnetic-field simulations. The peaks with delta(iso) = 11.2 +/- 0.8 and -1.8 +/- 0.8 ppm, both with C-Q = 2.6 +/- 0.4 MHz, were assigned to the Ca(II) and Ca(I) sites, respectively, on the basis of their relative intensities. Copyright (C) 2008 John Wiley & Sons, Ltd.
|Journal or Publication Title:||Magnetic Resonance in Chemistry|
|Uncontrolled Keywords:||NMR, Ca-43, multiple magnetic field analysis, hydroxyapatite|
|Deposited On:||29 Feb 2012 09:16|
|Last Modified:||03 Nov 2015 15:32|
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