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Analysis of Local Cation Arrangement in Mullite Using 29 Si Magic‐Angle Spinning Nuclear Magnetic Resonance Spectra
Author(s) -
Ban Takayuki,
Okada Kiyoshi
Publication year - 1993
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1993.tb03971.x
Subject(s) - mullite , magic angle spinning , chemical shift , nmr spectra database , spectral line , chemistry , resonance (particle physics) , magic angle , nuclear magnetic resonance , rietveld refinement , population , chemical composition , crystallography , analytical chemistry (journal) , nuclear magnetic resonance spectroscopy , materials science , crystal structure , ceramic , physics , atomic physics , stereochemistry , astronomy , sociology , demography , organic chemistry , chromatography
Local cation arrangements for mullites with various chemical compositions were examined using 29 Si magic‐angle spinning nuclear magnetic resonance (MAS NMR) spectra and the X‐ray Rietveld method. The structure of mullite was refined using the Rietveld method, and the relations between chemical composition and lattice constants were revised. 29 Si NMR spectra of mullites showed a main resonance at −86 ppm accompanied by weak resonances at −94, −90, and −81 to −82 ppm. These resonances were assigned to each local cation arrangement of TO 4 tetrahedra in mullite by calculating the chemical shift according to Sherriff and Grundy's method. The resonances at −81 to −82 ppm were assigned to the arrangement of the T(Si),T(Al)–O * c –T * (Al) cluster, which has been considered to be rather unusual, and their population was found to increase with increase in the Al 2 O 3 content in mullite.