The infrared spectrum of ammonia hydrate: Explanation for a reported ammonia phase

Godfrey Sill, Uwe Fink, John R. Ferraro

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A number of anomalous spectra of solid NH3 deposited from the vapor phase have appeared in the literature. These spectra have been ascribed to a new phase of NH3. In the experiment reported here these anomalous spectra were reproduced by depositing a thin film from a mixture of gaseous NH3 and H2O and annealing this film at a temperature of 162°K. The thin film spectra showed excellent agreement with recent data on NH3·H2O. The anomalous "NH3" spectra are, therefore, seen to be caused by H2O contamination of solid NH3 with formation of NH3 hydrate.

Original languageEnglish (US)
Pages (from-to)997-1000
Number of pages4
JournalThe Journal of Chemical Physics
Issue number2
StatePublished - Jan 1 1981


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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