Etude vibrationnelle d'aluminates et de gallates de terres rares—III. Aluminates et gallates de structure grenat

✍ Scribed by M.C. Saine; E. Husson; H. Brusset; A.Cerez de

• Book ID: 103907151
• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 436 KB
• Volume: 38
• Category: Article
• ISSN: 1386-1425
• DOI: 10.1016/0584-8539(82)80173-6

✦ Synopsis

The i.r. absorption and Raman scattering spectra of some aluminium and gallium garnets have been studied. They show a stronger force field in the aluminates than in the gallates and the influence of the ionic radius of the Ln" cation on the frequencies of the aluminium-oxygen or gallium~xygen network. The study of the system Er3Ga5012-Er3A150,2 permitted us to propose an assignment of the different ranges of frequencies and to point out that the tetrahedra vibrations are higher than the octahedra ones. The i.r. spectrum of the perovskite NdGa03 is compared to the garnet Nd3GaSOn one.