Multi-scale characterization of glaucophane from Chiavolino (Biella, Italy): implications for international regulations on elongate mineral particles
| Autor: | R. Vigliaturo, S. M. Elkassas, G. Della Ventura, G. J. Redhammer, F. Ruiz-Zepeda, M. J. O'Shea, G. Dražić, R. Gieré |
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| Přispěvatelé: | Vigliaturo, R., Elkassas, S. M., Della Ventura, G., Redhammer, G. J., Ruiz-Zepeda, F., O'Shea, M. J., Drazic, G., Giere, R. |
| Rok vydání: | 2021 |
| Předmět: |
education.field_of_study
Materials science Glaucophane Population Mineralogy Infrared spectroscopy 010501 environmental sciences engineering.material 010502 geochemistry & geophysics 01 natural sciences Article Characterization (materials science) symbols.namesake engineering symbols Particle Spectroscopy education Raman spectroscopy Environmental scanning electron microscope QE351-399.2 0105 earth and related environmental sciences |
| Zdroj: | European Journal of Mineralogy, Vol 33, Pp 77-112 (2021) European journal of mineralogy |
| ISSN: | 1617-4011 |
| DOI: | 10.5194/ejm-33-77-2021 |
| Popis: | In this paper, we present the results of a multi-analytical characterization of a glaucophane sample collected in the Piedmont region of northwestern Italy. Investigation methods included optical microscopy, powder X-ray diffraction, Fourier-transform infrared spectroscopy, µ-Raman spectroscopy, Mössbauer spectroscopy, electron probe microanalysis, environmental scanning electron microscopy and energy-dispersive X-ray spectroscopy, and scanning/transmission electron microscopy combined with energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy. In addition to the crystal–chemical characterization of the sample from the mesoscale to the near-atomic scale, we have also conducted an extended study on the morphology and dimensions of the mineral particles. The main finding is that studying the same particle population at different magnifications yields different results for mineral habit, dimensions, and dimensional distributions. As glaucophane may occur as an elongate mineral particle (e.g., asbestiform glaucophane occurrences in California and Nevada), the observed discrepancies therefore need to be considered when assessing potential breathability of such particles, with implications for future regulations on elongate mineral particles. While the sample preparation and particle counting methods are not directly investigated in this work, our findings suggest that different magnifications should be used when characterizing an elongate mineral particle population, irrespective of whether or not it contains asbestiform material. These results further reveal the need for developing improved regulation for elongate mineral particles. We thus propose a simple methodology to merge the datasets collected at different magnifications to provide a more complete description and a better risk evaluation of the studied particle population. |
| Databáze: | OpenAIRE |
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