Raman spectroscopy of KAl(MoO4)2 and NaAl(MoO4)2 single crystals

✍ Scribed by M. Maczka; S. Kojima; J. Hanuza

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 134 KB
• Volume: 30
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/(sici)1097-4555(199904)30:4<339::aid-jrs378>3.0.co;2-8

✦ Synopsis

Polarized Raman spectra were obtained for KAl(MoO 4 ) 2 and NaAl(MoO 4 ) 2 crystals at ambient temperature. Raman studies of NaAl(MoO 4 ) 2 were also performed over a wide temperature range, 100-930 K. The assignment of the observed bands to the respective stretching, bending and lattice modes was proposed. The temperature dependence of the Raman spectra showed that NaAl(MoO 4 ) 2 remains in the monoclinic structure up to the melting temperature. However, the monoclinic distortion from the trigonal D 3d 3 structure is relatively small at high temperatures and increases continuously with decreasing temperature.