High pressure Raman study of LiClO4

DongFei Li; Shuo Zhang; Hongsheng Jia; Mingxing Song; Ying Zhang; Haibo Li; Mi Zhou

doi:10.1016/j.saa.2022.121914

High pressure Raman study of LiClO₄

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jan 15:285:121914. doi: 10.1016/j.saa.2022.121914. Epub 2022 Sep 23.

Authors

DongFei Li¹, Shuo Zhang², Hongsheng Jia³, Mingxing Song⁴, Ying Zhang⁵, Haibo Li², Mi Zhou⁶

Affiliations

¹ Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin Province, PR China; State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, Jilin Province, PR China.
² Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin Province, PR China.
³ Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin Province, PR China; School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
⁴ College of Information and Technology, Jilin Normal University, Siping 136000, Jilin Province, PR China. Electronic address: mxsong@jlnu.edu.cn.
⁵ College of Physics, Changchun University of Science and Technology, Changchun 130013, China.
⁶ State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, Jilin Province, PR China. Electronic address: mzhou@jlu.edu.cn.

PMID: 36183538
DOI: 10.1016/j.saa.2022.121914

Abstract

Lithium perchlorate (LiClO₄), as one of the new high-energy oxidizers, is chosen for high pressure Raman research to gain a better understanding of the structure and stability, which is very important for the performance of an explosive. Raman spectra of LiClO₄ crystal have been measured from ambient to 25.07 GPa with diamond anvil cells (DACs) at room temperature to investigate the structural stability of this system. Raman vibrational modes of LiClO₄ crystal at ambient pressure were resolved comprehensively on the basis of our experimental and calculated results. Upon increase of pressure on LiClO₄ crystal sample to 1.96 GPa, it was found that the LiClO₄ crystal exhibited a pressure-induced first-order phase transformation behavior. The occurrence of a second phase transformation of LiClO₄ crystal induced by pressure was observed at about 5.09 GPa. Both phase transformations were demonstrated based on the detailed spectroscopic analysis of the variations in the number of lattice modes, splitting of Raman bands and frequency jumps of the Raman vibrational modes of LiClO₄ crystal.

Keywords: High pressure; Lithium perchlorate; Phase transformation; Raman spectroscopy.