# LATTICE VIBRATIONS OF $LaF_{3}$

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 Title: LATTICE VIBRATIONS OF $LaF_{3}$ Creators: Caspers, H. H.; Buchanan, R. A.; Marlin, H. R. Issue Date: 1964 Publisher: Ohio State University Abstract: The infrared spectrum of $LaF_{3}$ in the region from $50-575 cm^{-1}$ is presented. Four strong absorption bands at $185, 208, 275$, and $358 cm^{-1}$ are observed. The Raman spectrum has been investigated and five lines are found at $75, 292, 310, 365$, and $392 cm^{-1}$. A group theoretical analysis has been carried out for the two slightly different crystal structures proposed for lanthanum trifluoride. The room temperature data seems to favor the more symmetrical bimolecular unit cell. Symmetry coordinates are discussed and some tentative assignments are made. Description: Author Institution: Infrared Division, Research Department, U. S. Naval Ordnance Laboratory URI: http://hdl.handle.net/1811/14555 Other Identifiers: 1964-G-09