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Proceedings Paper

Raman spectroscopic study of barium fluorapatite
Author(s): Carl E. Bonner; Chahn C. Chess; Chandana Meegoda; Sennay Stefanos; George B. Loutts; George E. Miller
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Paper Abstract

The vibrations of phosphate (PO4-3) ions in single crystals of hexagonal Ba5(PO4)3F have been investigated by means of polarized Raman scattering and compared to Raman frequencies observed in fluorapatite analogs Sr5(PO4)3F and Ca5(PO4)3F. The Raman vibrational frequencies decrease upon substitution of Ba2+ for Sr2+ or Ca2+ in the lattice, asymptotically approaching the Raman frequencies for vibrations of the free ion. The observed splitting is in accord with predictions made by a group theory analysis of the factor group of the unit cell. The effects of the host lattice environment on the magnitude of the Davydov splittings and frequency shifts of phosphate ions within different crystals with the fluorapatite structure are demonstrated to be inversely proportional to the unit cell volume.

Paper Details

Date Published: 26 May 1999
PDF: 11 pages
Proc. SPIE 3610, Laser Material Crystal Growth and Nonlinear Materials and Devices, (26 May 1999); doi: 10.1117/12.349236
Show Author Affiliations
Carl E. Bonner, Norfolk State Univ. (United States)
Chahn C. Chess, Norfolk State Univ. (United States)
Chandana Meegoda, Norfolk State Univ. (United States)
Sennay Stefanos, Norfolk State Univ. (United States)
George B. Loutts, Norfolk State Univ. (United States)
George E. Miller, Norfolk State Univ. (United States)


Published in SPIE Proceedings Vol. 3610:
Laser Material Crystal Growth and Nonlinear Materials and Devices
Kathleen I. Schaffers; Lawrence E. Myers, Editor(s)

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