Zobrazeno 1 - 10 of 22 pro vyhledávání: '"Umberto Susta"'
1
Oxidation or cation re-arrangement? Distinct behavior of riebeckite at high temperature
Autor: Giancarlo Della Ventura, Günther J. Redhammer, Federico Galdenzi, Gennaro Ventruti, Umberto Susta, Roberta Oberti, Francesco Radica, Augusto Marcelli
Publikováno v: American Mineralogist. 108:59-69
In this work we address the stability of riebeckite at high temperatures and compare the different behaviors observed under various oxidation conditions. For this purpose, we annealed powders of a sample from Mt. Malosa (Malawi), which is composition
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d0b1995e0d037147e09fc9dbc3412e0
https://doi.org/10.2138/am-2022-8073
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2
Kinetics of dehydrogenation of riebeckite Na2Fe23+Fe32+Si8O22(OH)2: An HT-FTIR study
Autor: Giancarlo Della Ventura, Francesco Radica, Federico Galdenzi, Umberto Susta, Gianfelice Cinque, Mariangela Cestelli-Guidi, Boriana Mihailova, Augusto Marcelli
Publikováno v: American Mineralogist. 107:754-764
In this work, we address the kinetics of dehydrogenation occurring at high temperatures (HT) in riebeckite, a sodic amphibole with the ideal composition Na2Fe23+Fe32+Si8O22(OH)2. We performed isothermal experiments on both powders and single-crystals
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a0caa0be5b2803e49e84cc94f7c024c
https://doi.org/10.2138/am-2022-8021
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3
A Multi Scale Minero-chemical Analyses of Biomass Ashes: A Key to Evaluate their Danger vs Benefit
Autor: Paola Comodi, Umberto Susta, Costanza Cambi, Riccardo Vivani, Azzurra Zucchini, Gianluca Cavalaglio, Franco Cotana
A multi-methodic analysis was performed on 5 samples of fly ashes coming from different biomasses. The aim of the study was to evaluate their possible re-use and their dangerousness for men and environment. Optical granulometric analyses indicate tha
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d616c72bfa66d6e0002e186fcad11780
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4
Multi-Scale Minero-Chemical Analysis of Biomass Ashes: A Key to Evaluating Their Dangers vs. Benefits
Autor: Costanza Cambi, Umberto Susta, Azzurra Zucchini, Franco Cotana, Gianluca Cavalaglio, Paola Comodi, Riccardo Vivani
Publikováno v: Sustainability, Vol 13, Iss 6052, p 6052 (2021)
Sustainability
Volume 13
Issue 11
A multi-methodic analysis was performed on five samples of fly ashes coming from different biomasses. The aim of the study was to evaluate their possible re-use and their dangerousness to people and the environment. Optical granulometric analyses ind
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecfc0a566a5697d3cffecd1f8ca845f0
https://www.mdpi.com/2071-1050/13/11/6052
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6
The crystal-chemistry of riebeckite, ideally Na2Fe32+ Fe23+Si8O22(OH)2: a multi-technique study
Autor: Umberto Susta, Yassir A. Abdu, Boriana Mihailova, Frank C. Hawthorne, Roberta Oberti, Maxwell C. Day, Giancarlo Della Ventura
Publikováno v: Mineralogical Magazine. 82:837-852
In this work we report on a complete crystal-chemical characterization of a near end-member riebeckite from Malawi, and use the available data to critically compare information obtained from different analytical methods. The sample occurs as well-for
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fcfabaf875ebd0e72c6596386b3e7d2a
https://doi.org/10.1180/minmag.2017.081.064
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7
Deprotonation of Fe-dominant amphiboles: Single-crystal HT-FTIR spectroscopic studies of synthetic potassic-ferro-richterite
Autor: Giancarlo Della Ventura, Roberta Oberti, Guenther J. Redhammer, Umberto Susta, Augusto Marcelli, Fabio Bellatreccia
Publikováno v: The American mineralogist 102 (2017): 117–125. doi:10.2138/am-2017-5859
info:cnr-pdr/source/autori:Giancarlo Della Ventura1,2,*, Umberto Susta1, Fabio Bellatreccia1,2, Augusto Marcelli2, Günther J. Redhammer3, and Roberta Oberti/titolo:Deprotonation of Fe-dominant amphiboles: Single-crystal HT-FTIR spectroscopic studies of synthetic potassic-ferro-richterite/doi:10.2138%2Fam-2017-5859/rivista:The American mineralogist/anno:2017/pagina_da:117/pagina_a:125/intervallo_pagine:117–125/volume:102
High-temperature Fourier transform infrared (HT-FTIR) spectroscopy was used to characterize the deprotonation process of synthetic potassic-ferro-richterite of composition A ( K 0 . 90 Na 0 . 07 ) B ( Ca 0 . 54 Na 1 . 46 ) C ( Fe 4 . 22 2 + Fe 0 . 78
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c582ce3b26ca740eeae6cbdbe258b66e
https://doi.org/10.2138/am-2017-5859
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8
The dynamics of Fe oxydation in riebeckite: a model for amphiboles
Autor: Giancarlo Della Ventura, Jochen Schlüter, Umberto Susta, Boriana Mihailova, Augusto Marcelli, Mariangela Cestelli Guidi, Roberta Oberti
Publikováno v: The American mineralogist 103 (2018): 1103–1111. doi:10.2138/am-2018-6382
info:cnr-pdr/source/autori:Della Ventura, Giancarlo; Mihailova, Boriana; Susta, Umberto; Guidi, Mariangela Cestelli; Marcelli, Augusto; Schlueter, Jochen; Oberti, Roberta/titolo:The dynamics of Fe oxidation in riebeckite: A model for amphiboles/doi:10.2138%2Fam-2018-6382/rivista:The American mineralogist/anno:2018/pagina_da:1103/pagina_a:1111/intervallo_pagine:1103–1111/volume:103
In this work, we investigate the oxidation behavior of a nearly end-member riebeckite, ideally Na-2(Fe32+Fe23+)Si8O22(OH)(2), by using vibrational FTIR and Raman spectroscopies. Combining these results with previous studies performed on the same samp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ced0ef62ed3b2203b5e4518a914960a
https://hdl.handle.net/11590/340021
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10
The high-temperature behaviour of riebeckite: Expansivity, deprotonation, selective Fe oxidation and a novel cation disordering scheme for amphiboles
Autor: Umberto Susta, Günther J. Redhammer, Giancarlo Della Ventura, Michele Zema, Massimo Boiocchi, Roberta Oberti, Frank C. Hawthorne
Publikováno v: European journal of mineralogy
30 (2018): 437–449. doi:10.1127/ejm/2018/0030-2712
info:cnr-pdr/source/autori:Oberti R.; Boiocchi M.; Zema M.; Hawthorne F.C.; Redhammer G.J.; Susta U.; Della Ventura G./titolo:The high-temperature behaviour of riebeckite: Expansivity, deprotonation, selective Fe oxidation and a novel cation disordering scheme for amphiboles/doi:10.1127%2Fejm%2F2018%2F0030-2712/rivista:European journal of mineralogy (Print)/anno:2018/pagina_da:437/pagina_a:449/intervallo_pagine:437–449/volume:30
[The HT behaviour of a well-characterized sample of riebeckite has been examined by combining X-ray diffraction, FTIR and Mössbauer spectroscopy. The crystal-chemical composition of the crystal studied is: A(K0.05Na0.04) B(Na1.86Ca0.09Fe2+0.05) C(Fe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29e09fc69ca79d7e77b1402a873de0d6
http://www.cnr.it/prodotto/i/392034
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