Intercalation of N-methylformamide in kaolinite: In situ monitoring by near-infrared spectroscopy and X-ray diffraction

Autor: Marek Szczerba, Eirini Siranidi, Zuzanna Ciesielska, Fevronia T. Andreou, Arkadiusz Derkowski, Vassilis Gionis, Georgios D. Chryssikos, Barbara Barylska

Publikováno v: Applied Clay Science. 212:106209

The selective self-assembly of small molecules in the interlayer of kaolinite is a fundamentally important and technologically relevant process, typically studied ex situ by X-ray diffraction (XRD). Near-infrared (NIR) spectroscopy is now introduced

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec97ddbc0336240a9a81af2bb5acd5cd
https://doi.org/10.1016/j.clay.2021.106209

The Nature of Laponite: Pure Hectorite or a Mixture of Different Trioctahedral Phases?

Autor: George E. Christidis, Georgios D. Chryssikos, Matthias Stöter, Hussein Kalo, Carlos I. Aldana, Jean-Louis Robert, Vassilis Gionis, Josef Breu

Publikováno v: Minerals
Minerals, MDPI, 2018, 8 (8), pp.314. ⟨10.3390/min8080314⟩
Minerals, 2018, 8 (8), pp.314. ⟨10.3390/min8080314⟩
Minerals, Vol 8, Iss 8, p 314 (2018)
Volume 8
Issue 8

A series of laponites and synthetic OH- and fluorinated hectorites prepared from hydrothermal and melting experiments at both industrial and laboratory scale were examined with XRD and FTIR (MIR and NIR) to determine their mineralogical composition a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c925dcb0868a44fcaeb40e66906b270e
https://hal.sorbonne-universite.fr/hal-01875981/document

Near-infrared investigation of folding sepiolite

Autor: Maria Tsampodimou, Vanessa-Jane Bukas, Georgios D. Chryssikos, Vassilis Gionis, Elizabeth T. Stathopoulou

Publikováno v: American Mineralogist. 100:195-202

Sepiolite is an industrially important clay mineral of the palygorskite-sepiolite group with alternating 2:1 ribbons and hydrated tunnels. Dry sepiolite, Mg 8 Si 12 O 30 (OH) 4 (OH 2 ) 4 , loses half of its OH 2 content upon further heating and under

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a4e02321b02f02b6c5203253369282f
https://doi.org/10.2138/am-2015-4988

STRUCTURE AND DYNAMICS OF WATER-SMECTITE INTERFACES: HYDROGEN BONDING AND THE ORIGIN OF THE SHARP O-DW/O-HW INFRARED BAND FROM MOLECULAR SIMULATIONS

Autor: Georgios D. Chryssikos, Artur Kuligiewicz, Andrey G. Kalinichev, Vassilis Gionis, Marek Szczerba, Arkadiusz Derkowski

Publikováno v: Clays and Clay Minerals
Clays and Clay Minerals, Clay Minerals Society, 2016, 64 (4), pp.452-471. ⟨10.1346/ccmn.2016.0640409⟩

International audience; Experimental studies have shown that a sharp, high-frequency IR band at ~3615 cm-1 (in H2O form) and at ~2685 cm-1 (in D2O form) is a common feature for all smectites, and its position correlates with layer charge. In order to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07ac70b300e2b992ebe15076d779ffec
http://hal.in2p3.fr/in2p3-01577621/document

Structural Characterization of Reduced-Charge Montmorillonites. Evidence Based on FTIR Spectroscopy, Thermal Behavior, and Layer-Charge Systematics

Autor: Vassilis Gionis, Georgios D. Chryssikos, George E. Christidis, Evangelos N. Skoubris

Publikováno v: Clays and Clay Minerals. 61:83-97

In the present study, the gradual layer-charge reduction of two Li-saturated smectites, SAz-1 from Arizona, USA, and FEO-G from Troodos, Cyprus, with octahedral charge of 0.54 electrons per half unit cell (e/huc) and 0.39 e/huc, respectively, was mon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eca27bd9ecdd9033264a122e7b5fd02f
https://doi.org/10.1346/ccmn.2013.0610207