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IR‐ and 27 Al‐NMR‐spectroscopic studies on thermal decomposition products of basic aluminium chlorides
Author(s) -
Brand P.,
Müller D.,
Gessner W.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170250818
Subject(s) - corundum , aluminium , thermal decomposition , decomposition , chemistry , nmr spectra database , infrared spectroscopy , amorphous solid , nuclear magnetic resonance spectroscopy , spectroscopy , spectral line , inorganic chemistry , crystallography , mineralogy , stereochemistry , organic chemistry , physics , quantum mechanics , astronomy
The formation of corundum by thermal decomposition of basic aluminium chlorides was studies by means of spectroscopic methods (IR, 27 Al‐NMR). It was tried to get information about the short‐range order, because favourable structural conditions in the amorphous precursors for the formation of corundum were supposed. For this purpose IR‐spectroscopy turns out to be the less informative method. 27 Al‐NMR‐spectra show resonances of tetrahedrally, octahedrally and fivefold coordinated Al in the decomposition products. The corundum proceeds from sixfold and fivefold coordinated Al.