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Quantification of crystalline phases and measurement of phosphate chain lengths in a mixed phase sample by P-31 refocused INADEQUATE MAS NMR
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O'Dell, Luke A., Guerry, Paul, Wong, A. (Alan), Abou Neel, Ensanya A., Pham, T. N. (Tri Nang), Knowles, Jonathan C., Brown, Steven P. and Smith, Mark E. (2008) Quantification of crystalline phases and measurement of phosphate chain lengths in a mixed phase sample by P-31 refocused INADEQUATE MAS NMR. Chemical Physics Letters, Vol.455 (No.4-6). pp. 178-183. doi:10.1016/j.cplett.2008.02.070 ISSN 0009-2614.
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Official URL: http://dx.doi.org/10.1016/j.cplett.2008.02.070
Abstract
A P-31 refocused INADEQUATE pulse sequence has been used in combination with XRD to identify and quantify the crystalline phases present in a ternary sodium calcium phosphate ceramic of composition (CaO)(0.4)(Na2O)(0.1)(P2O5)(0.5). Both the NMR and XRD identified the two main phases present as NaCa(PO3)(3) and beta-Ca(PO3)(2). A third unidentified calcium phosphate phase was also observed by MAS NMR, featuring a chain of six crystallographically distinct PO4 units, the P-31 MAS NMR chemical shifts of which have been identified in the correct sequence along the chain. (C) 2008 Elsevier B.V. All rights reserved.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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| Divisions: | Administration > University Executive Office Faculty of Science, Engineering and Medicine > Science > Physics |
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| Library of Congress Subject Headings (LCSH): | Phase transformations (Statistical physics), Nuclear magnetic resonance spectroscopy, Phosphates, Crystals | ||||
| Journal or Publication Title: | Chemical Physics Letters | ||||
| Publisher: | Elsevier BV | ||||
| ISSN: | 0009-2614 | ||||
| Official Date: | 10 April 2008 | ||||
| Dates: |
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| Volume: | Vol.455 | ||||
| Number: | No.4-6 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | pp. 178-183 | ||||
| DOI: | 10.1016/j.cplett.2008.02.070 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Natural Sciences and Engineering Research Council Canada (NSERC), Biotechnology and Biological Sciences Research Council (Great Britain) | ||||
| Grant number: | EP/C004698/1 (EPSRC), EP/C000714/1 (EPSRC), EP/C000633/1 (EPSRC) |
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