Abstract
Two nitrogen ceramic phases, the oxynitride LiSiON and the nitride LiSi 2N 3, have been studied by 6 Li and 7 Li NMR. Magic angle spinning (MAS) NMR experiments have been carried out at two magnetic field strengths (7.05 and 14.1 T). The spectra give evidence of the relative effects of the quadrupolar and chemical shift interactions. The electric field gradient tensor of both phases has been determined accurately by iterative fitting of the 6 Li and 7 Li MAS NMR line shapes at the two magnetic field strengths. Due to the fact that for 7 Li the quadrupolar interaction is much larger than the chemical shift interaction, it is shown that neither the small chemical shift anisotropy nor the relative orientation of the two interaction tensors can be determined accurately by 7 Li MAS NMR. For 6 Li , the two interactions are comparable and the value of these parameters obtained from the fits of the 6 Li experimental MAS line shapes are therefore much more reliable.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
