| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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King, Penelope
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2019 An experimental study of SO 2 reactions with silicate glasses and supercooled melts in the system anorthite–diopside–albite at high temperature citations
- 2018SO2 gas reactions with silicate glassescitations
- 2015Porphyry copper deposit formation by sub-volcanic sulphur dioxide flux and chemisorptioncitations
- 2013Development of a new laboratory technique for high-temperature thermal emission spectroscopy of silicate meltscitations
- 2013A micro-reflectance IR spectroscopy method for analyzing volatile species in basaltic, andesitic, phonolitic, and rhyolitic glassescitations
- 2013Volatile-rich silicate melts from Oldoinyo Lengai volcano (Tanzania)citations
- 2011Methods to analyze metastable and microparticulate hydrated and hydrous iron sulfate mineralscitations
- 2009Effect of SiO2, total FeO, Fe3+/Fe2+ and alkali elements in basaltic glasses on mid-infrared spectracitations
- 2007Resolution of bridging oxygen signals from O 1s spectra of silicate glasses using XPScitations
- 2006A new approach to determine and quantify structural units in silicate glasses using micro-reflectance Fourier-Transform infrared spectroscopycitations
- 2002CO2 solubility and speciation in intermediate (andesitic) meltscitations
Places of action
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article
A new approach to determine and quantify structural units in silicate glasses using micro-reflectance Fourier-Transform infrared spectroscopy
Abstract
<p>Eight silicate unit vibrational modes were identified in a suite of PbO-SiO<sub>2</sub> glasses using microreflectance Fourier Transform infrared (μR-FTIR) spectra that were transformed using the Kramers-Kronig relation. The transformed FTIR spectra, in the 800-1200 cm<sup>-1</sup> range, were deconvolved systematically into eight Voigt-shaped bands at centers that were predicted from the second derivative of the spectra. The area of the eight bands varied as a function of SiO<sub>2</sub> content, and these trends were combined with theoretical constraints to identify and assign the bands to seven provisional silicate units: SiO<sub>4</sub><sup>4-</sup> (830 and 860 cm<sup>-1</sup>), Si<sub>2</sub>O<sub>7</sub><sup>6-</sup> (900 cm<sup>-1</sup>), Si<sub>6</sub>O<sub>18</sub><sup>12-</sup> (950 cm<sup>-1</sup>), Si<sub>2</sub>O6<sup>4-</sup> (980 cm<sup>-1</sup>), Si<sub>4</sub>O<sub>11</sub><sup>6-</sup> (1010 cm<sup>-1</sup>), Si<sub>2</sub>O<sub>5</sub><sup>2-</sup> (1050 cm<sup>-1</sup>), and SiO<sub>2</sub> (1100 cm<sup>-1</sup>). The provisional units were then grouped according to their NBO/T values: NBO/T = 4 (SiO<sub>4</sub> <sup>4-</sup>), NBO/T = 3 (Si<sub>2</sub>O<sub>7</sub> <sup>6-</sup>), NBO/T = 2 (S<sub>i</sub>6O<sub>18</sub> <sup>12-</sup> and Si<sub>2</sub>O<sub>6</sub><sup>4-</sup>), NBO/T = 1 (Si<sub>4</sub>O<sub>11</sub><sup>6-</sup> and Si<sub>2</sub>O<sub>5</sub><sup>2-</sup>) and NBO/T = 0 (SiO<sub>2</sub>). The derived quantities of each NBO/T unit compare favorably with nuclear magnetic resonance data for PbO-SiO<sub>2</sub> glasses reported in the literature. This new approach for determining glass structure is advantageous because it may be performed on small Fe-bearing samples with minimal preparation, and analyses are rapid and relatively inexpensive.</p>