Abstract

The fundamental lattice vibrations of the trigonal CdCl2 structure have been analyzed group theoretically. All k=0 optical modes are either infrared or Raman active, so a complete vibrational analysis is possible. Results of far-infrared measurements on crystal and powder samples using a Fourier-transform spectrometer together with single-crystal Raman spectra are presented for CdCl2, CdBr2, MnCl2, and CoCl2. Symmetry assignments of the observed frequencies are made on the basis of polarization behavior. Second-order infrared and Raman spectra are also presented; peaks in the two-phonon axial infrared absorption spectra are assigned to allowed fundamental combinations at k=0. The infrared absorption spectra exhibit additional features in the range 200–4000 cm−1 that are ascribed to impurities.

© 1973 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Lattice Vibration Spectra of Mg(OH)2 and Ca(OH)2

R. A. Buchanan, H. H. Caspers, and J. Murphy
Appl. Opt. 2(11) 1147-1150 (1963)

Raman studies of lanthanum cuprate superconductors

W. H. Weber, C. R. Peters, and E. M. Logothetis
J. Opt. Soc. Am. B 6(3) 455-464 (1989)

Infrared Lattice Spectra of Rare-Earth Stannate and Titanate Pyrochlores

John F. McCaffrey, Neil T. McDevitt, and Conrad M. Phillippi
J. Opt. Soc. Am. 61(2) 209-212 (1971)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (5)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription