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MASS SPECTROMETRIC STUDY OF HEATS OF SUBLIMATION OF DYSPROSIUM, SAMARIUM, THULIUM, AND YTTERBIUM

Journal Article · · Journal of Chemical Physics (U.S.)
DOI:https://doi.org/10.1063/1.1729877· OSTI ID:4291289

The flax of atoms from a Knudsen-type effusion cell has been studied by means of a mass spectrometer. The heat of sublimation was obtained from the dependence of the ion current upon the cell temperature by means of the Clausius- Clapeyron equation. The method was used to obtain heat of sublimation values for dysprosium, samarium, thulium, and ytterbium. The results were: Dy, 69.3 plus or minus 0.6 kcal/mole for vaporization at 1215 deg K; Sm, 48.7 plus or minus 0.4 kcal/mole for vaporization at 811 deg K; Tm, 56.2 plus or minus 0.4 kcal/ mole for vaporization at 937 deg K; and Yb, 39.5 plus or minus 0.5 kcal/mole for vaporization at 667 deg K. (auth)

Research Organization:
Iowa State Coll., Ames
Sponsoring Organization:
USDOE
NSA Number:
NSA-13-009153
OSTI ID:
4291289
Journal Information:
Journal of Chemical Physics (U.S.), Journal Name: Journal of Chemical Physics (U.S.) Vol. Vol: 30; ISSN JCPSA
Country of Publication:
Country unknown/Code not available
Language:
English

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