Accession Number:

AD0651562

Title:

RARE EARTHS. IV. DISSOCIATION ENERGIES OF THE GASEOUS MONOXIDES OF THE RARE EARTHS.

Descriptive Note:

Technical rept.,

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1967-05-01

Pagination or Media Count:

67.0

Abstract:

The dissociation energy of the gaseous rare earch monoxides together with the closely related compounds ScO and YO were determined from Knudsen effusion and mass spectrometric isomolecular oxygen-exchange reaction studies. It is shown that there is a double periodicity in the variations of the dissociation energies with atomic number and that these variations closely match those of the heats of sublimation of the rare earth metals. Assuming a common bound state for the monoxides, MO--, it is shown that the variations in the dissociation energies in the lanthanide series correspond to the magnitude of the 4fn to 4fn-15d transitions of the divalent ions. Author9

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE