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dc.creatorRadosavljević-Mihajlović, Ana
dc.creatorDaković, Aleksandra
dc.creatorKašić, Vladan
dc.creatorMitić, Vojislav V.
dc.creatorStojanović, Jovica
dc.creatorSokić, Miroslav
dc.creatorMarković, Branislav
dc.date.accessioned2023-04-21T11:36:34Z
dc.date.available2023-04-21T11:36:34Z
dc.date.issued2018
dc.identifier.issn0367-598X
dc.identifier.urihttps://ritnms.itnms.ac.rs/handle/123456789/466
dc.description.abstractThis paper presents mineralogical and crystallographic characterization of the zeolitic tuff from the Novakovic deposit, Republic of Bosnia and Herzegovina. The zeolitic tuff is of a whitish color composed of Ca-clinoptilolite and an amorphous phase (volcanic glass and amorphous SiO2). The zeolitic tuff was analyzed by X-ray diffraction of the polycrystalline sample (XRPD), scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS), and differential thermal and thermogravimetric (DTA/DTG) methods. According to the results obtained, it can be concluded that the studied zeolitic tuff is composed of Heu-type minerals. Based on the chemical analysis, thermal treatment and XRPD analysis it was determined that this is a mineral Ca-clinoptilolite. Thermal analysis in the temperature range from 300 up to 700 degrees C showed that the examined zeolite minerals from the Nova-kovic deposit are stable up to the temperature of 600 degrees C. The crystal structure of Ca-clinoptilolite has been refined in the centrosymmetric space group C2/m (S.G. 12) with disordered distribution of Al and Si in the tetrahedral framework. The unit-cell parameters are as follows: a = 17.662 angstrom, b = 17.874 angstrom, c = 7.402 angstrom, beta = 116.32 degrees and V = 2122.73 angstrom(3). The basic structural motif is represented by four channels. Three channels are composed of eight-membered rings, and one of ten-membered rings. The ten-membered (channel A) and one eight-membered channel (B) are parallel to the crystallographic axis c, and the other eight-membered channel is parallel to the a-axis. Ca-clinoptilolite comprises approximately 90% of the studied zeolite tuff while the rest 10 % is the amorphous phase. The overall cation exchange capacity (CEC) amounts to 187 mmolM(+)/100 g, and calcium represents the most abundant cation in the studied sample. The atomic ratios of Si/Al, Na+/(Na++K+), and Ca2+/(Ca2++Mg2+) are as follows: 4.36, 0.14, and 0.55, respectively. The zeolite tuff is both thermally and structurally stable and has applications in various areas of industry and agriculture.en
dc.publisherSavez hemijskih inženjera, Beograd
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceHemijska industrija
dc.subjectzeolitic tuffen
dc.subjectX-ray powder diffractionen
dc.subjectthermal stabilityen
dc.subjectcrystal structureen
dc.titleMineralogy and crystallographic properties of HEU-type zeolitic tuff from the Novakovic deposit, Bosnia and Herzegovinaen
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage382
dc.citation.issue6
dc.citation.other72(6): 371-382
dc.citation.rankM23
dc.citation.spage371
dc.citation.volume72
dc.identifier.doi10.2298/HEMIND180725026R
dc.identifier.fulltexthttps://ritnms.itnms.ac.rs/bitstream/id/215/463.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_dais_5250
dc.identifier.rcubconv_840
dc.identifier.scopus2-s2.0-85062948440
dc.identifier.wos000454433300006
dc.type.versionpublishedVersion


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