Proton Dynamics in Letovicite, (NH4)3H(S
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Michael Fechtelkord; Astrid Engelhardt; Josef-Christian Buhl; Lutz Schwalowsky;
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Article
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2000
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Elsevier Science
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English
β 190 KB
The improper ferroelastic phase letovicite (NH 4 ) 3 H(SO 4 ) 2 has been studied by 1 H MAS NMR as well as by static 14 N NMR experiments in the temperature range of 296-425 K. The 1 H MAS NMR resonance from ammonium protons can be well distinguished from that of acidic protons. A third resonance ap