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A High-Resolution NMR Study of the La-Si-Al-O-N System

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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A High-Resolution NMR Study of the La-Si-Al-O-N System. / Dupree, R.; Lewis, M.H.; Smith, M.E.
In: Journal of the American Chemical Society, Vol. 111, No. 14, 1989, p. 5125-5132.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Dupree, R, Lewis, MH & Smith, ME 1989, 'A High-Resolution NMR Study of the La-Si-Al-O-N System', Journal of the American Chemical Society, vol. 111, no. 14, pp. 5125-5132. https://doi.org/10.1021/ja00196a016

APA

Dupree, R., Lewis, M. H., & Smith, M. E. (1989). A High-Resolution NMR Study of the La-Si-Al-O-N System. Journal of the American Chemical Society, 111(14), 5125-5132. https://doi.org/10.1021/ja00196a016

Vancouver

Dupree R, Lewis MH, Smith ME. A High-Resolution NMR Study of the La-Si-Al-O-N System. Journal of the American Chemical Society. 1989;111(14):5125-5132. doi: 10.1021/ja00196a016

Author

Dupree, R. ; Lewis, M.H. ; Smith, M.E. / A High-Resolution NMR Study of the La-Si-Al-O-N System. In: Journal of the American Chemical Society. 1989 ; Vol. 111, No. 14. pp. 5125-5132.

Bibtex

@article{69427c1970ea4bff9090f7891a3ad12d,
title = "A High-Resolution NMR Study of the La-Si-Al-O-N System",
abstract = "Hieh-resolution 27Al, 29Si, and 139La NMR spectra have been obtained from crystalline phases of the La-Si-Al-O-N system. These results have further defined the 29Si chemical shift ranges in mixed coordination tetrahedra (i.e., SiOxN4-x, 0 ≤ x ≤ 4) and enabled the cation's influence on the chemical shift in such units to be investigated for the first time. The ability to distinguish distinct local environments, despite overlap of the 29Si chemical shift ranges from different units, has allowed structural refinement of certain phases (e.g., La4Si2O7N2). The 27Al NMR spectrum of LaAlO3 shows appreciable intensity from transitions other than the 1/2↔−1/2, emphasing the difficulties of quantitatively interpreting NMR spectra of quadrupole nuclei. For the first time MAS is applied to 139La NMR and is shown to have some limited applicability to the study of ceramics. High-resolution multinuclear NMR is shown to be a powerful monitor of phase development and probe of compositional detail in complex ceramic phase mixtures. {\textcopyright} 1989, American Chemical Society. All rights reserved.",
keywords = "Ceramic Materials--Spectroscopic Analysis, Nuclear Magnetic Resonance, Spectroscopy, Apatite, Ceramic Mixtures, Silicon Oxynitride, Lanthanum Compounds",
author = "R. Dupree and M.H. Lewis and M.E. Smith",
year = "1989",
doi = "10.1021/ja00196a016",
language = "English",
volume = "111",
pages = "5125--5132",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "AMER CHEMICAL SOC",
number = "14",

}

RIS

TY - JOUR

T1 - A High-Resolution NMR Study of the La-Si-Al-O-N System

AU - Dupree, R.

AU - Lewis, M.H.

AU - Smith, M.E.

PY - 1989

Y1 - 1989

N2 - Hieh-resolution 27Al, 29Si, and 139La NMR spectra have been obtained from crystalline phases of the La-Si-Al-O-N system. These results have further defined the 29Si chemical shift ranges in mixed coordination tetrahedra (i.e., SiOxN4-x, 0 ≤ x ≤ 4) and enabled the cation's influence on the chemical shift in such units to be investigated for the first time. The ability to distinguish distinct local environments, despite overlap of the 29Si chemical shift ranges from different units, has allowed structural refinement of certain phases (e.g., La4Si2O7N2). The 27Al NMR spectrum of LaAlO3 shows appreciable intensity from transitions other than the 1/2↔−1/2, emphasing the difficulties of quantitatively interpreting NMR spectra of quadrupole nuclei. For the first time MAS is applied to 139La NMR and is shown to have some limited applicability to the study of ceramics. High-resolution multinuclear NMR is shown to be a powerful monitor of phase development and probe of compositional detail in complex ceramic phase mixtures. © 1989, American Chemical Society. All rights reserved.

AB - Hieh-resolution 27Al, 29Si, and 139La NMR spectra have been obtained from crystalline phases of the La-Si-Al-O-N system. These results have further defined the 29Si chemical shift ranges in mixed coordination tetrahedra (i.e., SiOxN4-x, 0 ≤ x ≤ 4) and enabled the cation's influence on the chemical shift in such units to be investigated for the first time. The ability to distinguish distinct local environments, despite overlap of the 29Si chemical shift ranges from different units, has allowed structural refinement of certain phases (e.g., La4Si2O7N2). The 27Al NMR spectrum of LaAlO3 shows appreciable intensity from transitions other than the 1/2↔−1/2, emphasing the difficulties of quantitatively interpreting NMR spectra of quadrupole nuclei. For the first time MAS is applied to 139La NMR and is shown to have some limited applicability to the study of ceramics. High-resolution multinuclear NMR is shown to be a powerful monitor of phase development and probe of compositional detail in complex ceramic phase mixtures. © 1989, American Chemical Society. All rights reserved.

KW - Ceramic Materials--Spectroscopic Analysis

KW - Nuclear Magnetic Resonance

KW - Spectroscopy

KW - Apatite

KW - Ceramic Mixtures

KW - Silicon Oxynitride

KW - Lanthanum Compounds

U2 - 10.1021/ja00196a016

DO - 10.1021/ja00196a016

M3 - Journal article

VL - 111

SP - 5125

EP - 5132

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 14

ER -