Optical properties of natural topaz

International Conference on Functional Materials and Nanotechnologies 2013

材料科学;物理学

Skvortsova, V.^1 ; Mironova- Ulmane, N.^1 ; Trinkler, L.^1 ; Chikvaidze, G.^1

Institute of Solid State Physics, University of Latvia, Latvia^1

关键词: Broad bands;    Fast neutron irradiation;    Fast neutrons;    Infrared and Raman spectra;    Lattice disorders;    Radiation defects;    UV visible absorption spectrum;    UV-vis spectra;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/49/1/012051/pdf
DOI  :  10.1088/1757-899X/49/1/012051

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The results of investigation of infrared, Raman and UV-Visible absorption spectra of natural topaz crystals from Ukraine before and after fast neutron irradiation are presented. We assume that the ∼ 620 nm band in topaz crystals is associated with the presence of Cr3+, Fe2+and Mn2+impurities. The broad band with maxima at 650 cm-1observed in Raman spectra for topaz irradiated by fast neutrons may be connected with lattice disorder. Exchange interaction between radiation defect and impurity ions during neutron irradiation leads to appearance of additional absorption band in UV-VIS spectra and bands broadening in infrared and Raman spectra of investigated crystals.