Polarized Raman spectra of the oriented NaY(WO4)2 and KY(WO4)2 single crystals

被引：94

作者：

Macalik, L

Hanuza, J

Kaminskii, AA

机构：

[1] Polish Acad Sci, W Trzebiatowski Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, Poland

[2] Russian Acad Sci, Inst Crystallog, Joint Open Lab Laser Crystals & Precise Laser Sys, Moscow, Russia

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2000年 / 555卷

关键词：

polarized Raman spectra; NaY(WO4)(2); KY(WO4)(2);

D O I：

10.1016/S0022-2860(00)00612-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polarized Raman scattering spectra of the NaY(WO4)(2) (NYW) single crystal have been measured. Its structure is described in the tetragonal space group isomorphic to CaWO4 scheelite. The A(g), B-g, and E-g, spectra were made and discussed in terms of factor group analysis. These spectra are compared to those of monoclinic KY(WO4)(2) (KYW) single crystals whose structure differs from the other crystal. The NYW unit cell comprises of the isolated WO4 tetrahedra whereas the KYW structure is built from the WO6 octahedra joined by WO2W double bonds and WOW single bridges. The Vibrational characteristics of the bridge bond systems are proposed. On this basis, the role of the vibronic transitions for the KYW crystal doped with Eu3+ ions is discussed. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：289 / 297

页数：9

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