Structure and Vibration Spectrum of Laser Crystal Yb:KGd(WO4)2

Abstract

Abstract: The selection of the flux and the design of the proper processes are the key factor for the growth of Yb:KGd(WO₄)₂ laser crystal. Yb:KGd(WO₄)₂crystal was grown by the Top
Seeded Solvent Growth (TSSG) method using K₂W₂O₇ as a suitable flux. On the base of TG-DTA, the crystal has two obvious absorption peaks at
1086℃ and 1021℃, its melting point is 1086℃, phase transition temperature from tetragonal to monoclinic is 1021℃. The Yb:KGd(WO₄)₂
crystal consists of WO6 octahedra which consists of WOOW double oxygen bridges and WOW single bridges. IR and Raman spectra show the atom
group WO₄^2- flex vibration at 436 cm^-1 and atom group WO₄^2- bend vibration at 740～925cm^-1, WOOW double oxygen bridge vibration at 903, 765, 684, 438, 498 and 297cm^-1, WOW single
bridges vibration at 808, 526 and 232cm^-1. Analyzing on the X-ray diffraction spectrum of Yb:KGd(WO₄)₂ crystal powder sample, we can
conclude that the β-Yb:KGd(WO₄)₂ crystal is of a monoclinic system, and C2/c space group.

Key words: crystal growth, structure of crystal, Raman spectrum, IR spectrumk

CLC Number:

WANG Ying-Wei,CHENG Hao-Bo,ZHU Zhong-Li,LI Jian-Li,LIU Jing-He. Structure and Vibration Spectrum of Laser Crystal Yb:KGd(WO₄)₂[J]. Journal of Inorganic Materials.

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Structure and Vibration Spectrum of Laser Crystal Yb:KGd(WO₄)₂

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