Symmetry Coordinates and Lattice Vibrations of LaCl3
- 1 February 1964
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 40 (3), 743-753
- https://doi.org/10.1063/1.1725201
Abstract
Symmetry coordinates for the 24k=0 modes of LaCl3 are derived. These symmetry coordinates form a basis in terms of which the normal modes are expanded. From a group theoretical analysis of the C6h2(p63/m) space group, it is determined that there are three infrared‐active (1A1u and 2E1u), six Raman‐active (2A1g, 1E1g, and 3E2g), and five nonactive (2Bg, 2Bu, and 1E2u) vibrational modes. Three infrared absorption bands were observed in evaporated LaCl3 films at 138, 165, and 210 cm—1. Three force parameters were determined using the wavenumbers of the infrared‐active modes. The wavenumbers of the other modes were expressed as functions of the fourth force parameter. For one value of this parameter, agreement with the observed Raman lines was obtained with an average deviation of 6.6 cm—1.Keywords
This publication has 5 references indexed in Scilit:
- Lattice Vibrations of LaCl3 and LaBr3 from Vibronic SpectraThe Journal of Chemical Physics, 1963
- Energy Levels of PrCl3The Journal of Chemical Physics, 1961
- Paramagnetic Resonance in Rare Earth TrichloridesThe Journal of Chemical Physics, 1958
- The Vibrational Spectra of Molecules and Complex Ions in Crystals. I. General TheoryThe Journal of Chemical Physics, 1948
- The UCl3 Type of Crystal StructureThe Journal of Chemical Physics, 1948