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Eur. J. Mass Spectrom. 8, 157 - 161 (2002) |
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Origin of clusters: IV. Low temperature fast-atom bombardment cluster patterns point to the possible existence of NaCl crystalline hydrates incorporating heavy water | ||
Marina V. Kosevich,* Oleg A. Boryak and Vadim S. Shelkovsky |
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ABSTRACT: | ||
Low temperature fast-atom bombardment study of frozen D2ONaCl solutions gave results similar to those obtained earlier for the H2ONaCl system. Thus, sets of clusters (D2O)n"D+, (D2O)n"Na+, (D2O)n"NaCl"Na+, (NaCl)m"Na+ with a characteristic distribution depending on the composition of the sample and phase transitions on its thawing were recorded. A typical cluster pattern, attributed in the case of the H2ONaCl system to a phase of a crystalline hydrate NaCl"2H2O, was observed for the D2ONaCl system as well. At the same time, recently available reference data on the solubility of NaCl do not contain a specification for the formation of a crystalline hydrate on cooling of NaCl solution in D2O. Considering the present mass spectrometry data, the possibility of incorporation of heavy water into NaCl crystalline hydrates is discussed. | ||
Keywords: low temperature fast-atom bombardment, clusters, heavy water, NaCl, crystalline hydrates |
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