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Digitale Medien

Raman scattering investigations of KY3F10 (1991)

Mortier, M. ; Gesland, J. Y. ; Rousseau, M. ; [weitere]

Chichester [u.a.] : Wiley-Blackwell

Journal of Raman Spectroscopy 22 (1991), S. 393-396

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ISSN: 0377-0486

Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Single crystals of the fluoride compound KY3F10 (Oh5) were studied by Raman scattering from 40 to 950 K. Group theory analysis predicts 3A1g + 4Eg + 6F2g Raman-active modes, but the experimental spectra show two F2g modes missing. Over the whole temperature range the frequency shifts are negligible whereas the line widths show a strong increase with temperature. Both reversible and irreversible line width behaviour are exhibited for different temperature runs, indicating a complex microscopic phenomenon underlying the creation of defects responsible for these line widths and their interaction with the different phonon modes. An approximate activation energy for defect creation of ΔE ≍ 0.3 eV can be obtained from the temperature behaviour of the line widths. This activation energy may be connected with the high-temperature ionic conduction mentioned previously for this crystal.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jrs.1250220706

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Digitale Medien

Ueber die Brom-camphocarbonsäure (1873)

de Santos E Silva, J.

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 6 (1873), S. 1092-1093

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ISSN: 0365-9496

Schlagwort(e): Chemistry ; Inorganic Chemistry