The molecular structure of the borate mineral szaibelyite MgBO2(OH) – A vibrational spectroscopic study
| Autor: | Ricardo Scholz, Ray L. Frost, Fernanda Maria Belotti, Andrés López |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Infrared
Organic Chemistry Analytical chemistry chemistry.chemical_element Infrared spectroscopy Isotopes of boron Isotopic splitting Spectral line Analytical Chemistry Inorganic Chemistry symbols.namesake chemistry Phase (matter) Raman spectroscopy symbols Molecule Boron Szaibelyite Borate Spectroscopy |
| Zdroj: | Repositório Institucional da UFOP Universidade Federal de Ouro Preto (UFOP) instacron:UFOP |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2015.02.005 |
| Popis: | We have studied the borate mineral szaibelyite MgBO 2 (OH) using electron microscopy and vibrational spectroscopy. EDS spectra show a phase composed of Mg with minor amounts of Fe. Both tetrahedral and trigonal boron units are observed. The nominal resolution of the Raman spectrometer is of the order of 2 cm −1 and as such is sufficient enough to identify separate bands for the stretching bands of the two boron isotopes. The Raman band at 1099 cm −1 with a shoulder band at 1093 cm −1 is assigned to BO stretching vibration. Raman bands at 1144, 1157, 1229, 1318 cm −1 are attributed to the BOH in-plane bending modes. Raman bands at 836 and 988 cm −1 are attributed to the antisymmetric stretching modes of tetrahedral boron. The infrared bands at 3559 and 3547 cm −1 are assigned to hydroxyl stretching vibrations. Broad infrared bands at 3269 and 3398 cm −1 are assigned to water stretching vibrations. Infrared bands at 1306, 1352, 1391, 1437 cm −1 are assigned to the antisymmetric stretching vibrations of trigonal boron. Vibrational spectroscopy enables aspects of the molecular structure of the borate mineral szaibelyite to be assessed. |
| Databáze: | OpenAIRE |
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