Direct evidence of Lowenstein's rule violation in swelling high-charge micas
2014; Royal Society of Chemistry; Volume: 50; Issue: 53 Linguagem: Inglês
10.1039/c4cc01632g
ISSN1364-548X
AutoresEsperanza Pavón, Francisco J. Osuna, María D. Alba, Laurent Delevoye,
Tópico(s)NMR spectroscopy and applications
ResumoThe structure of high-charged micas, Na-n-micas (n = 2 and 4), a family of synthetic silicates with a wide range of applications, was investigated through the use of 17O solid-state NMR at natural abundance in order to preserve quantitative spectral information. The use of a very high-field and highly sensitive probehead, together with 17O NMR literature data allowed for the detection of an isolated signal at 26 ppm, assigned partially to AlOAl, as evidence of the violation of Lowenstein's rule for Na-4-mica.
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