TY  - JOUR
AU  - Radosavljević-Mihajlović, Ana
AU  - Mitić, Vojislav V.
AU  - Šaponjić, Aleksandra
AU  - Kasić, Vladan
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12387
AB  - Data on thermally induced transformations of Mn exchanged zeolites LTA and FAU topology are presented in this paper. Thermally induced phase transformation of Mn-exchange zeolites are followed in the range from 700 to 1300oC. Both frameworks collapse into amorphous intermediate products after heating between 600 and 650oC. Prolonged heating of the intermediate product above 1100 °C results directly in formation of a disorder Mn-anorthiteLTA and Mn-anorthiteFAU. The parameter of unit cell of Mn-anorthiteLTA and Mn-anorthiteFAU, in temperature range between 700 and 1300oC, was observed in space group C-1. The phase conversions in the temperature range investigated were followed by thermal, X-ray powder diffraction and FT-IR analyses.
T2  - Science of Sintering
T1  - Thermally induced phase transformation of Mn-LTA and Mn-FAU zeolite to anorthite phases
SP  - 397
EP  - 406
VL  - 53
IS  - 3
DO  - 10.2298/SOS2103397R
UR  - https://hdl.handle.net/21.15107/rcub_dais_12387
ER  - 

@article{
author = "Radosavljević-Mihajlović, Ana and Mitić, Vojislav V. and Šaponjić, Aleksandra and Kasić, Vladan",
year = "2021",
abstract = "Data on thermally induced transformations of Mn exchanged zeolites LTA and FAU topology are presented in this paper. Thermally induced phase transformation of Mn-exchange zeolites are followed in the range from 700 to 1300oC. Both frameworks collapse into amorphous intermediate products after heating between 600 and 650oC. Prolonged heating of the intermediate product above 1100 °C results directly in formation of a disorder Mn-anorthiteLTA and Mn-anorthiteFAU. The parameter of unit cell of Mn-anorthiteLTA and Mn-anorthiteFAU, in temperature range between 700 and 1300oC, was observed in space group C-1. The phase conversions in the temperature range investigated were followed by thermal, X-ray powder diffraction and FT-IR analyses.",
journal = "Science of Sintering",
title = "Thermally induced phase transformation of Mn-LTA and Mn-FAU zeolite to anorthite phases",
pages = "397-406",
volume = "53",
number = "3",
doi = "10.2298/SOS2103397R",
url = "https://hdl.handle.net/21.15107/rcub_dais_12387"
}

Radosavljević-Mihajlović, A., Mitić, V. V., Šaponjić, A.,& Kasić, V.. (2021). Thermally induced phase transformation of Mn-LTA and Mn-FAU zeolite to anorthite phases. in Science of Sintering, 53(3), 397-406.
https://doi.org/10.2298/SOS2103397R
https://hdl.handle.net/21.15107/rcub_dais_12387

Radosavljević-Mihajlović A, Mitić VV, Šaponjić A, Kasić V. Thermally induced phase transformation of Mn-LTA and Mn-FAU zeolite to anorthite phases. in Science of Sintering. 2021;53(3):397-406.
doi:10.2298/SOS2103397R
https://hdl.handle.net/21.15107/rcub_dais_12387 .

Radosavljević-Mihajlović, Ana, Mitić, Vojislav V., Šaponjić, Aleksandra, Kasić, Vladan, "Thermally induced phase transformation of Mn-LTA and Mn-FAU zeolite to anorthite phases" in Science of Sintering, 53, no. 3 (2021):397-406,
https://doi.org/10.2298/SOS2103397R .,
https://hdl.handle.net/21.15107/rcub_dais_12387 .

TY  - JOUR
AU  - Radosavljević-Mihajlović, Ana S.
AU  - Daković, Aleksandra S.
AU  - Kašić, Vladan
AU  - Mitić, Vojislav V.
AU  - Stojanović, Jovica N.
AU  - Sokić, Miroslav D.
AU  - Marković, Branislav R.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/5250
AB  - This 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 SiO 2 ). 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°C showed that the examined zeolite minerals from the Novaković deposit are stable up to the temperature of 600°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 Å, b = 17.874 Å, c = 7.402 Å, β = 116.32° and V = 2122.73 Å 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 Ca 2+ /(Ca 2+ +Mg 2+ ) 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. © 2018, Association of Chemists and Chemical Engineers of Serbia. All rights reserved.
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Mineraloške i kristalografske osobine zeolitskog tufa heu-tipa lokaliteta novaković, Bosna i Hercegovina
SP  - 371
EP  - 382
VL  - 72
IS  - 6
DO  - 10.2298/HEMIND180725026R
UR  - https://hdl.handle.net/21.15107/rcub_dais_5250
ER  - 

@article{
author = "Radosavljević-Mihajlović, Ana S. and Daković, Aleksandra S. and Kašić, Vladan and Mitić, Vojislav V. and Stojanović, Jovica N. and Sokić, Miroslav D. and Marković, Branislav R.",
year = "2018",
abstract = "This 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 SiO 2 ). 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°C showed that the examined zeolite minerals from the Novaković deposit are stable up to the temperature of 600°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 Å, b = 17.874 Å, c = 7.402 Å, β = 116.32° and V = 2122.73 Å 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 Ca 2+ /(Ca 2+ +Mg 2+ ) 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. © 2018, Association of Chemists and Chemical Engineers of Serbia. All rights reserved.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Mineraloške i kristalografske osobine zeolitskog tufa heu-tipa lokaliteta novaković, Bosna i Hercegovina",
pages = "371-382",
volume = "72",
number = "6",
doi = "10.2298/HEMIND180725026R",
url = "https://hdl.handle.net/21.15107/rcub_dais_5250"
}

Radosavljević-Mihajlović, A. S., Daković, A. S., Kašić, V., Mitić, V. V., Stojanović, J. N., Sokić, M. D.,& Marković, B. R.. (2018). Mineraloške i kristalografske osobine zeolitskog tufa heu-tipa lokaliteta novaković, Bosna i Hercegovina. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 72(6), 371-382.
https://doi.org/10.2298/HEMIND180725026R
https://hdl.handle.net/21.15107/rcub_dais_5250

Radosavljević-Mihajlović AS, Daković AS, Kašić V, Mitić VV, Stojanović JN, Sokić MD, Marković BR. Mineraloške i kristalografske osobine zeolitskog tufa heu-tipa lokaliteta novaković, Bosna i Hercegovina. in Hemijska industrija. 2018;72(6):371-382.
doi:10.2298/HEMIND180725026R
https://hdl.handle.net/21.15107/rcub_dais_5250 .

Radosavljević-Mihajlović, Ana S., Daković, Aleksandra S., Kašić, Vladan, Mitić, Vojislav V., Stojanović, Jovica N., Sokić, Miroslav D., Marković, Branislav R., "Mineraloške i kristalografske osobine zeolitskog tufa heu-tipa lokaliteta novaković, Bosna i Hercegovina" in Hemijska industrija, 72, no. 6 (2018):371-382,
https://doi.org/10.2298/HEMIND180725026R .,
https://hdl.handle.net/21.15107/rcub_dais_5250 .