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'27A1 MAS NMR' in keywords Facet   Publication Year 2001  [X]
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2001[X]
1Author    G. D. Zissia, C. Bessada3Requires cookie*
 Title    27A1 NMR Spectra of the REC13-A1C13 (RE = Y, La) Glasses and Melts  
 Abstract    27 AI NMR spectra of pure crystalline and molten A1C13 and of RECI3-AICI3 (RE = Y, La) glass form­ ing binary mixtures have been obtained. Compositions corresponding mainly to YC13/A1C13 = 1/3 and LaCiyAlC^ = 1/3.7 have been studied from the glassy and crystalline state up to the melt. The 27A1 spectra can be unambiguously assigned to four-coordinated Al-species, such as A12C16, 'A1C14', and 'A12C17\ The chemical shifts lie between 95 and 110 ppm, very well separated with the -1.6 ppm giv­ en by the 'A1C16' coordination in solid A1C13. From the temperature evolution of the 27Al NMR spec­ tra, a description for the dynamic behaviour of these systems is proposed. 
  Reference    Z. Naturforsch. 56a, 697—701 (2001) 
  Published    2001 
  Keywords    27A1 MAS NMR, REC13-A1C13, Glass Forming Melts, Structure, Dynamics 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0697.pdf 
 Identifier    ZNA-2001-56a-0697 
 Volume    56