Raman and Fourier transform infrared spectroscopic study of pyromorphite-vanadinite solid solutions
| Autor: | Maciej Manecki, Tomasz Bajda, Urszula Solecka, Justyna Topolska, Sylwia Zelek-Pogudz |
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| Rok vydání: | 2018 |
| Předmět: |
Ionic radius
Infrared Chemistry Analytical chemistry Vanadium chemistry.chemical_element Infrared spectroscopy 010501 environmental sciences engineering.material Vanadinite 010402 general chemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Analytical Chemistry symbols.namesake Pyromorphite symbols engineering Raman spectroscopy Instrumentation Spectroscopy 0105 earth and related environmental sciences Solid solution |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 190:96-103 |
| ISSN: | 1386-1425 |
| Popis: | Due to the great range of the application fields for apatites, there is a strong need to complete the data set determining the properties of these minerals. In this study, Raman and Infrared spectra of the phases from pyromorphite Pb5(PO4)3Cl - vanadinite Pb5(VO4)3Cl series were investigated. Totally, 9 samples (2 end-members and 7 solid solutions of the series) were synthesized at 25°C and pH=3.5, and analyzed. In the Raman and Infrared spectra of the studied Pb-apatites, the bands typical for the vibrations in the PO4 and the VO4 tetrahedra appeared. The bands attributed to the stretching vibrations (ν1, ν3) occurred in the 1050-910cm-1 and 830-720cm-1 regions, whereas the bending vibrations (ν2, ν4) were visible at the 580-540cm-1, 430-380cm-1 and 370-290cm-1 range. The position of the bands depended on the P/(P+V) ratio in the analyzed solid, since there are differences in the ionic radii and the atomic mass of P5+ and V5+, which affect the bong lengths, bond forces and the banding energies of the substituting tetrahedra. The analysis allowed observing gradual shifts of the bands caused by the replacement of phosphorous with vanadium in the studied phases. The positions and the intensities of selected bands are proposed to serve as a semi-quantitative estimation of the chemical composition of the phases from the pyromorphite - vanadinite series. |
| Databáze: | OpenAIRE |
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