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Updated: Jun 8, 2025
Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
Nonstoichiometry as a hidden aspect of TbAl3(BO3)4 optical properties
A B Kuznetsov1, A Y Jamous1,2, M I Rakhmanova3
1Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Russia. ku.artemy@igm.nsc.ru.
Abstract:
TbAl3(BO3)4 should not be considered as a strictly stoichiometric compound. A variety of Tb1+Al3-(BO3)4 (x = -0.1-0.15) single phase compositions with the R32 space group were synthesized in the TbBO3-(Al2O3·B2O3) system. The K2Mo3O10-B2O3-Al2O3 flux was used to grow Tb1+Al3-(BO3)4 (x = 0.06 and 0.09) crystals. The orthoborates have typical luminescence in the green range which correlated with the 5D3 → 7F6 electron transition of Tb3+. However, deviating from stoichiometry can result in halving the quantum efficiency of luminescence. The SHG efficiency from 1064 nm radiation for Tb1+Al3-(BO3)4 crystals (x = 0.06 and 0.09) was found to be 1.82 and 1.53 times higher than that of KDP, respectively.
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