Abstract
Results are presented for the cathodoluminescence (CL), radioluminescence (RL) and thermoluminescence (TL) of jade from Turkey. Jade samples show broad band luminescence from green to red, which, using lifetime-resolved CL, reveals seven overlapping emissions, of which two are dominant. Green emission obtained using spatially resolved CL was associated with Mn
2+ and emission bands centered near at 480 and 530
nm were attributed to
3P
0–
3H
4 and
1D
2–
3H
4 transitions of Pr
3+, respectively. Different shifts of the peak-wavelengths for 326 and 565
nm were observed with varying jade compositions. The incorporation of the larger K ion causes non-linear variations of the cell dimensions and therefore changes in the FeO band distance. We suggest that stress of the jade structure can be linked to the luminescence emission at 326
nm. Raman spectra have also been recorded in order to provide an unequivocal identification of the type of jade. The mechanism for the luminescence of the jade is considered.
►Jade spectrum displays numerous broad bands at room and low temperatures. ►Different luminescence centers contribute to the overall signal. ►The Raman spectra and associated vibrational assignments are reported for jadeite. ►The TL sensitivity varies depending on the treatment of the samples.