POLARIZED RAMAN-SPECTRA OF NABI(MOO4)2 CRYSTAL AND ORDER-DISORDER EFFECT IN SOLID SCHEELITES

被引：27

作者：

HANUZA, J ^{[1
]}

MACZKA, M ^{[1
]}

MACALIK, L ^{[1
]}

VANDERMAAS, J ^{[1
]}

机构：

[1] UNIV UTRECHT,FAC CHEM,UTRECHT,NETHERLANDS

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1994年 / 325卷

关键词：

D O I：

10.1016/0022-2860(94)80026-X

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 spectra of NaBi(MoO4)2 single crystal were measured in the range 20-1000 cm-1 at room temperature. Factor group analysis has been performed to determine the symmetries and nature of the observed modes. From our measurements we conclude that the phonons above 300 cm-1 originate from internal molybdenum-oxygen vibrations and those under 200 cm-1 from external vibrations. The results obtained are interpreted by assuming microscopic composition fluctuation and the order-disorder state in the crystal lattice sites occupied by Na+ and Bi3+ ions.

引用

页码：119 / 124

页数：6

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