Infrared absorption spectra of formates of the rare earth elements

1967 ◽  
Vol 8 (1) ◽  
pp. 45-49 ◽  
Author(s):  
O. D. Saralidze ◽  
L. P. Shklover ◽  
K. I. Petrov ◽  
V. E. Plyushchev
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Infrared Absorption Spectra ◽  
The Rare Earth

The Influence of Sample Self-Absorption on Wavelength Shifts and Shape Changes in the Soft X-Ray Region: The Rare-Earth M Series

1967 ◽  
Vol 11 ◽  
pp. 230-240
Author(s):  
David W. Fischer ◽  
William L. Baun
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Absorption Spectra ◽  
Emission Spectra ◽  
Emission Lines ◽  
Electron Transitions ◽  
Emission And Absorption Spectra ◽  
Real Emission ◽  
Shape Changes ◽  
The Rare Earth

AbstractThe Mα and Mβ emission spectra and the Mjv and My absorption spectra have been studied for the entire series of rare-earth elements. It is conclusively shown that the complicated multiplet structure observed in the emission spectra is not real emission structure but is, instead, produced by sample self-absorption. This is demonstrated by observing the emission spectra over wide variations in take-off angle and bombarding electron energies and finally by comparing the detailed structure of both the emission and absorption spectra. The MIV and MV absorption structure completely overlaps the Mα and Mβ emission lines, which are each found to have but one intensity maximum when obtained under conditions of minimum. self-absorption. Some of these spectra have never been shown previously, while others have been studied in detail by several investigators. Points of agreement and disagreement with previous work are mentioned, and the wavelengths of the emission lines and absorption edges are listed for all of the rare-earth elements. It is concluded that the 4f → 3d electron transitions are reversible in these elements.

Spectral Investigations of Some Rare Earth β-Diketonates in the Region 750—250 cm-1

1971 ◽  
Vol 26 (4) ◽  
pp. 759-762
Author(s):  
P. C. Mehta ◽  
S. P. Tandon
Keyword(s):  
Rare Earth ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Spectral Region ◽  
Force Constants ◽  
Vibration Modes ◽  
Bond Strengths ◽  
Infrared Absorption Spectra

Abstract The infrared absorption spectra of fifteen La3+, Pr3+, Nd3+, and Sm3+ β-diketonates have been studied in the spectral region 750-250 cm-1. The existence of three metal-oxygen vibration modes suggests D3 symmetry for the chelates under study. The stretching force constants, fMO , of the MO bonds have been computed from the observed infrared M-O vibrations using the method of Müller. The value of fMO is nearly constant (~ 2.7x105 dynes/cm) in all the chelates suggesting similar bond strengths.

Flame spectra of the rare-earth elements*

1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
The Rare Earth
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