Infrared and Raman spectroscopy of mullite-type Bi2Ga4O9

被引：27

作者：

Beran, A. ^{[1
]}

Libowitzky, E. ^{[1
]}

Burianek, M. ^{[2
]}

Muehlberg, M. ^{[2
]}

Pecharroman, C. ^{[3
]}

Schneider, H. ^{[2
]}

机构：

[1] Univ Vienna, Inst Mineral & Kristallog, Geozentrum, A-1090 Vienna, Austria

[2] Univ Cologne, Inst Kristallog, D-50674 Cologne, Germany

[3] CSIC, Inst Ciencia Mat Madrid, Dpto Solidos Ion, E-28049 Madrid, Spain

来源：

CRYSTAL RESEARCH AND TECHNOLOGY | 2008年 / 43卷 / 11期

关键词：

mullite-type ceramics; bismuth gallium oxide; vibrational spectroscopy; infrared; Raman; reflectance; ATR;

D O I：

10.1002/crat.200800396

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Mullite-type Bi2Ga4O9 single-crystals were grown by the top-seeded solution growth (TSSG) method and investigated by vibrational spectroscopy. Polarised IR specular reflectance and attenuated total reflectance (ATR) spectra, as well as polarised micro-Raman spectra were acquired at room temperature. Powder IR spectra of sol-gel-derived samples were also recorded. Using model calculations and comparison to other mullite-type compounds, bands at similar to 850 - 400 cm(-1) could be assigned to stretching and bending vibrations of the structural GaO4 and GaO6 units. Low-energetic modes were attributed to motions involving Bi atoms. The IR spectra of Bi2Ga4O9 display close similarities to those of the mullite-type alkali gallates (9Ga(2)O(3) center dot Rb2O), while their differences to those of mullite sensu stricto (3Al(2)O(3) center dot 2SiO, and 2Al(2)O(3) center dot SiO2 repectively) are assigned to Si-O stretching vibrations of the corresponding tetrahedral units.

引用

页码：1230 / 1239

页数：10

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