X-ray diffraction and FTIR spectroscopy of heat treated R2O3:3Ga2O3:4B2O3 systems
| Autor: | E. Beregi, János Madarász, Andrea Watterich, Katalin Lassányi Péterné Polgár, M. Tóth |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Huntite
Crystal chemistry Analytical chemistry chemistry.chemical_element Infrared spectroscopy engineering.material Atmospheric temperature range Condensed Matter Physics Inorganic Chemistry chemistry X-ray crystallography Materials Chemistry engineering Gallium Fourier transform infrared spectroscopy Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Crystal Growth. :874-878 |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/s0022-0248(01)02042-5 |
| Popis: | In the R 2 O 3 :3Ga 2 O 3 :4B 2 O 3 systems (R=La, Nd, Sm, Gd, Ho, Y, Er and Yb), X-ray diffraction and infrared absorption spectroscopy were used to study the solid-state reactions in the 575–1050°C temperature range. In some samples (R=Sm, Gd, Ho, Er and Y) huntite (RGa 3 (BO 3 ) 4 ) phases accompanied by RBO 3 and GaBO 3 intermediate phases were identified. However, in the systems of R 2 O 3 :3Ga 2 O 3 :4B 2 O 3 for R=La 3+ , Nd 3+ and Yb 3+ , instead of the expected huntite phases, La-, Nd-metaborate or YbGa(BO 3 ) 2 dolomite type phases were formed. Detailed XRD of the rare-earth gallium borates are presented for the first time. Based on the above results, some chemical reactions were assumed for the processes. |
| Databáze: | OpenAIRE |
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