The molecular structure of the borate mineral szaibelyite MgBO2(OH): A vibrational spectroscopic study

Frost, Ray L., Scholz, Ricardo, López, Andrés, & Belotti, Fernanda Maria (2015) The molecular structure of the borate mineral szaibelyite MgBO2(OH): A vibrational spectroscopic study. Journal of Molecular Structure, 1089, pp. 20-24.

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We have studied the borate mineral szaibelyite MgBO2(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.

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ID Code: 83758
Item Type: Journal Article
Refereed: Yes
Keywords: Szaibelyite, Borate, Boron, Raman spectroscopy, Isotopic splitting
DOI: 10.1016/j.molstruc.2015.02.005
ISSN: 0022-2860
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier B.V.
Copyright Statement: Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Deposited On: 27 Apr 2015 01:51
Last Modified: 02 Nov 2015 18:10

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