Data for photoluminescence spectra of natural Cr3+-doped MgAl2O4 spinel during order-disorder transition

Chengsi Wang; Andy H Shen; Yungui Liu

doi:10.1016/j.dib.2020.106310

Data for photoluminescence spectra of natural Cr³⁺-doped MgAl₂O₄ spinel during order-disorder transition

Data Brief. 2020 Sep 15:32:106310. doi: 10.1016/j.dib.2020.106310. eCollection 2020 Oct.

Authors

Chengsi Wang¹, Andy H Shen¹, Yungui Liu²

Affiliations

¹ Gemmological Institute, China University of Geosciences (Wuhan), Hubei Province 430074, China.
² College of Gems and Materials Technology, Hebei GEO University, Hebei Province 050031, China.

Abstract

Photoluminescence (PL) spectra of natural Cr³⁺ doped MgAl₂O₄ spinel from Tanzania were taken during its order-disorder transition (ODT) process. Samples were changed their disordered degree by quenching treatment. PL spectra were taken at the liquid nitrogen (LN) temperature (∼77 K) using a 532 nm laser excitation. Spectra from different states were compared with each other and R-line and N-line ratio was used to illustrate the disordered degree of spinel during ODT process. It can be used as a reference for other similar researches, such as spinel PL characterization of the other members of this group, ordered degree of synthetic spinel single crystal or ceramics materials, thermal history of spinel, and non-destructive identification of natural and heated spinel gemstones, spinel original distinguishing, further PL spectra analysis and XRD relationship research.

Keywords: Gemology; Order-disorder transition; Photoluminescence spectroscopy; Spinel; Thermal history.