Study of raw and thermally treated sepiolite from the Mantoudi area, Euboea, Greece: X-ray diffraction, TG/DTG/DTA and FTIR investigations

Perraki, Th; Orfanoudaki, A

dc.contributor.author	Perraki, Th	en
dc.contributor.author	Orfanoudaki, A	en
dc.date.accessioned	2014-03-01T01:29:15Z
dc.date.available	2014-03-01T01:29:15Z
dc.date.issued	2008	en
dc.identifier.issn	1388-6150	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19184
dc.subject	Calcination	en
dc.subject	FTIR	en
dc.subject	Sepiolite	en
dc.subject	TG-DTG-DTA	en
dc.subject	XRD	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Calcination	en
dc.subject.other	Fourier transform infrared spectroscopy	en
dc.subject.other	Phase transitions	en
dc.subject.other	Recrystallization (metallurgy)	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Co-ordinated water	en
dc.subject.other	Sepiolite	en
dc.subject.other	Bubbles (in fluids)	en
dc.title	Study of raw and thermally treated sepiolite from the Mantoudi area, Euboea, Greece: X-ray diffraction, TG/DTG/DTA and FTIR investigations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10973-007-8329-8	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10973-007-8329-8	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Raw and thermally treated sepiolites from the Mantoudi area, Euboea, Greece, were investigated by means of X-ray diffraction (XRD) in combination with thermo-gravimetric analysis (TG/DTG) and differential thermal analysis (DTA), as well as Fourier transform (FTIR) spectroscopy, in order to study the collapse of the sepiolite structure with increasing temperature. The main mineral constituent (>95%) is a well crystallized sepiolite. Quartz and dolomite occur in minor amounts. Calcination of the samples was carried out up to 350, 720 and 820°C, for 2 h, and 'sepiolite dihydrite', 'sepiolite anhydrite' and 'enstatite' were formed, respectively, as magnesium co-ordinated water and octahedrically co-ordinated hydroxyl groups, are removed and the dehydroxylated phase recrystallize to enstatite (MgSiO3). These structural and textural changes play an important role to the properties and uses of the studied sepiolites. © 2008 Springer Science+Business Media, LLC.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Thermal Analysis and Calorimetry	en
dc.identifier.doi	10.1007/s10973-007-8329-8	en
dc.identifier.isi	ISI:000252994700040	en
dc.identifier.volume	91	en
dc.identifier.issue	2	en
dc.identifier.spage	589	en
dc.identifier.epage	593	en