Open AccessVIBRATIONAL SPECRTA OF SINGLE CRYSTAL Li2B4O7
Author(s) -
Lingzhi Zeng,
Yijian Jiang,
Fu Yi,
Yadong Zhou
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.154
Subject(s) - materials science , raman spectroscopy , boron , single crystal , infrared spectroscopy , molecular vibration , infrared , polar , crystal (programming language) , range (aeronautics) , absorption spectroscopy , molecular physics , analytical chemistry (journal) , atomic physics , optics , crystallography , chemistry , physics , programming language , organic chemistry , chromatography , astronomy , computer science , composite material
Polarized Raman spectra of single crystal Li2B4O7 have been measured in the wavenum-ber shift range of 50-3000cm-1 at room temperature. The infrared absorption spectrum of Li2B4O7 has also been measured in the range of 200-4000cm-1 for powder samples dispersed in the pressed KBr disks. Based upon the experimental results of LO-TO splitting, the effective charge and mode strength of polar modes are calculated. A comparison of the structure and B-O stretching vibration frequency of various borate species suggests comparatively high nonlinear optical efficiency of Li2B4O7 crystals.