Fluorite-rod, yellow region absorbance and fluorescence
This shows the rippled vibronic absorption band (light blue and green spectra) seen is some yellow fluorites, resulting from a type II colour centre with the ozonide O3- (Bill, 1982: www.unige.ch/sciences/chifi/publis/refs_pdf/ref00761.pdf ). A band spacing of 800 - 900 cm-1 was found by Andrews (1975, scitation.aip.org/content/aip/journal/jcp/63/10/10.1063/1... ) for the O3- in Li and Na compounds.
The red fluorescence band is shown as an orange line with a polynomial fit in grey. The normalised fluorescence is shown in red. This shows a few narrow, weak REE lines but also a set of weak vibronic ripples with delta-k of approx. 550 cm-1.
Fluorite-rod, yellow region absorbance and fluorescence
This shows the rippled vibronic absorption band (light blue and green spectra) seen is some yellow fluorites, resulting from a type II colour centre with the ozonide O3- (Bill, 1982: www.unige.ch/sciences/chifi/publis/refs_pdf/ref00761.pdf ). A band spacing of 800 - 900 cm-1 was found by Andrews (1975, scitation.aip.org/content/aip/journal/jcp/63/10/10.1063/1... ) for the O3- in Li and Na compounds.
The red fluorescence band is shown as an orange line with a polynomial fit in grey. The normalised fluorescence is shown in red. This shows a few narrow, weak REE lines but also a set of weak vibronic ripples with delta-k of approx. 550 cm-1.