Raman fingerprint of orientational freezing in mixed molecular crystals

Abstract

Joosen, W.; Fleurent, H.; Bostoen, C.; Schoemaker, D.; Haussuhl, S.

Local structures and relative stabilities of Tl+-dimer substitutional impurity centres in NaI and KI

“…Nevertheless, experimental reports on the optical properties of these dimer centres in different alkali halide host lattices have been published throughout the years [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. More complicated aggregate centres involving ns 2 substitutional ions have also been observed [27][28][29][30]. Knowledge of just the absorption/emission properties does not permit one to make definite statements about the geometric structure of the defect complex, however.…”