Lattice dynamic investigation of the phonon wavenumbers of CaGeO3 perovskite

✍ Scribed by H. C. Gupta; P. Ashdhir

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 55 KB
• Volume: 30
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/(sici)1097-4555(199906)30:6<493::aid-jrs401>3.0.co;2-y

✦ Synopsis

A short-range force constant model was applied to investigate the phonons in CaGeO 3 perovskite in the orthorhombic phase. The calculations with six stretching and bending force constants provide good agreement for the Raman wavenumbers. The correct assignments of the observed Raman wavenumbers were made based on the present calculations. The infrared wavenumbers have also been assigned for the first time.