Pressure dependence of Raman-active phonons of CaBr2

 
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1992 (EN)
Pressure dependence of Raman-active phonons of CaBr2 (EN)

Holzapfel, WB (EN)
Raptis, C (EN)
Krobok, M (EN)

N/A (EN)

Raman scattering measurements have been carried out in anhydrous CaBr2 under variable pressure, in the range 0-100kbar using nitrogen as pressure transmitting medium. At low pressures (p<25kbar) five Raman-active phonons have been identified, out of the six expected for the orthorhombic D2h12 structure; plots of the phonon frequencies against the pressure show steep slopes up to this pressure. Above 25kbar, substantial changes of the spectrum (including an increase of the number of phonon peaks) have been observed, accompanied by alterations of the phonon frequency slopes. The variation of the Raman spectrum suggests that some kind of high-pressure structural change occurs in the crystal. (EN)

journalArticle

Raman scattering (EN)
Raman active phonons (EN)
Spectroscopic analysis (EN)
Calcium bromide (EN)
Phonon frequency slopes (EN)
Calcium compounds (EN)
High pressure effects in solids (EN)
Crystal structure (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

High Pressure Research (EN)

1992


N/A (EN)



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