LATTICE VIBRATION-SPECTRA .65. RAMAN-SPECTRA OF MNSE2, MNTE2, RUTE2, AND OSTE2

被引：29

作者：

MULLER, B

LUTZ, HD

机构：

[1] Universität - Gesamthochschule - Siegen, Anorganische Chemie I, D-5900 Siegen

来源：

SOLID STATE COMMUNICATIONS | 1991年 / 78卷 / 05期

关键词：

D O I：

10.1016/0038-1098(91)90706-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Raman spectra (single crystals and hot-pressed samples) of pyrite-type MnSe2, MnTe2, RuTe2, and OsTe2 are presented. The five allowed first-order Raman-active phonon modes have been observed and classified. The energies of the pure X-X stretching modes (species A(g), tellurides 175-179 cm-1, MnSe2 267 cm-1) do not simply correlate to the X-X bond lengths owing to the different interplay of intraionic and interionic lattice forces on these vibrations. The energies of the X2 librations (E(g), tellurides 120-190 cm-1) reflect the metal-chalcogen bond strengths, which increase in the order Mn < Ru < Os.

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页码：469 / 471

页数：3

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