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Упит dcterms_subject_txt:nanomaterial characterization

214 items

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... Geology, 168, 80–107. doi: 10.1016/j.coal.2016.07.008 MITROVIĆ, D., ĐOKOVIĆ, N., ŽIVOTIĆ, D., BECHTEL, A., CVETKOVIĆ, O. & STOJANOVIĆ, K. (2017): Characterization of lignite lithotypes from the “Kovin” deposit (Serbia) – Implications from petrographic, biomarker and isotopic analy­ sis.– Journal of the ...
    ... Coal Geo­ logy, 118, 58–87. doi: 10.1016/j.coal.2013.08.007 PALMER, C.A., TUNCALI, E., DENNEN, K.O., COBURN, T.C. & FINKELMAN, R.B. (2004): Characterization of Turkish coals: a nationwide perspective.– Inter­ national Journal of Coal Geology, 60, 85–115. doi: 10.1016/j.coal.2004.05.001 PAVLOVIĆ, M ...

  • Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog basena i uticaj na životnu sredinu

    Željko R. Cvetković (2013-11-18)
    Čestice iz vazduha su prikupljane u blizini termoelektrane i površinskih kopovarudnika uglja u Kolubarskom basenu. Izmereni srednji sadržaji koncentracija rastvornih,nerastvornih i ukupnih taložnih materija na godišnjem nivou prelaze 200 mg/m2dan (K-1, K-3, K-4, K-5). Distribucija čestica na svim lokacijama klasifikovana je na česticeveličine veće od 10 μm, zatim na čestice veličine od 10 μm do 2,5 μm i klase česticaveličine ispod 2,5 μm. Ovakva podela je dala odnos koncentracija inhalatornih irespiratornih čestica po mernim mestima. Skenirajuća elektronska mikroskopija jepokazala ...
    mineral, četica, prašina, leteći pepeo, aerosediment, PM10, teški metali,koncentracija, veličina čestice, Kolubara
    ... 83, 2286-5-2292. Kihong, P & Hung, D. D. (2010). Characterization of metal aerosols in PM10 from urban, industrial, and Asian Dust sources., Environ. Monit. Assess. 160, 289-300. Kutchko, G. B. and Kim, G. A. (2006). Fly ash characterization by SEM-EDS, Fuel 85, 2537 – 2544. Lapenas, D., ...
    ... multicomponent utilization. 3. Characterization of magnetic and chair concentrates, Fuel 83, 1563-1583. Vassilev, V. S. and Menendez, R. (2005a). Phase-mineral and chemical composition of coal fly ashes as a basis for their multicomponent utilization. 4. Characterization of heavy concentrates and ...
    ... many toxic elements (such as Pb, Zn, As, Cd, Co, Hg, Cr). This paper shows that the concentration of particles, mineralogical and chemical characterization of air particles from coal mine and power plant, is crucial for the inhalation fractions, and for the identification of potentially dangerous ...

  • Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog basena i uticaj na životnu sredinu

    Željko R. Cvetković (2013-11-18)
    Čestice iz vazduha su prikupljane u blizini termoelektrane i površinskih kopovarudnika uglja u Kolubarskom basenu. Izmereni srednji sadržaji koncentracija rastvornih,nerastvornih i ukupnih taložnih materija na godišnjem nivou prelaze 200 mg/m2dan (K-1, K-3, K-4, K-5). Distribucija čestica na svim lokacijama klasifikovana je na česticeveličine veće od 10 μm, zatim na čestice veličine od 10 μm do 2,5 μm i klase česticaveličine ispod 2,5 μm. Ovakva podela je dala odnos koncentracija inhalatornih irespiratornih čestica po mernim mestima. Skenirajuća elektronska mikroskopija jepokazala ...
    mineral, četica, prašina, leteći pepeo, aerosediment, PM10, teški metali,koncentracija, veličina čestice, Kolubara
    ... 83, 2286-5-2292. Kihong, P & Hung, D. D. (2010). Characterization of metal aerosols in PM10 from urban, industrial, and Asian Dust sources., Environ. Monit. Assess. 160, 289-300. Kutchko, G. B. and Kim, G. A. (2006). Fly ash characterization by SEM-EDS, Fuel 85, 2537 – 2544. Lapenas, D., ...
    ... multicomponent utilization. 3. Characterization of magnetic and chair concentrates, Fuel 83, 1563-1583. Vassilev, V. S. and Menendez, R. (2005a). Phase-mineral and chemical composition of coal fly ashes as a basis for their multicomponent utilization. 4. Characterization of heavy concentrates and ...
    ... many toxic elements (such as Pb, Zn, As, Cd, Co, Hg, Cr). This paper shows that the concentration of particles, mineralogical and chemical characterization of air particles from coal mine and power plant, is crucial for the inhalation fractions, and for the identification of potentially dangerous ...

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology

  • Investigating distant effects of the Moesian promontory: Brittle tectonics along the western boundary of the Getic unit (East Serbia)

    Ana Mladenović, Milorad D. Antić, Branislav Trivić, Vladica Cvetković (2019)
    In this study, we report evidence for brittle deformation in a part of the Carpatho–Balkan orogen, which is explained in terms of effects of the rigid Moesian promontory of the European plate on fault kinematics in East Serbia. We focus on the westernmost part of the Getic Unit of the East Serbian Carpatho–Balkanides, i.e. the Gornjak–Ravanica Unit, located between two main thrusts that were repeatedly activated from Early Cretaceous to recent times. We combine a new data set on ...
    Getikum, Mezijska jedinica, Karpato-balkanski orogen, krte deformacije, Gornjačko-ravanička jedinica

  • Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species

    Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)
    Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...
    microstructure, microwave-hydrothermal synthesis, adsorption, magnetic nanoparticles, arsenic

  • Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије

    Nebojša B. Atanacković (2018-08-31)
    Велики број напуштених рударских радова и ограничена средства за рекултивацијуи ремедијацију деградираних простора подстакле су развој метода за издвајањеприоритетних локација на које је потребно усмерити даља истраживања. У датомконтексту, у склопу израде дисертације спроведене су научно-истраживачкеактивности које су за предмет имале анализу утицаја значајнијих напуштенихрударских радова на водне ресурсе на простору Србије јужно од Саве и Дунава.Разматрање предметне проблематике извршено је кроз развој и примену семи-квантитативне методологије за анализу ризика од загађивања површинских иподземних вода на регионалној размери. Примењена ...
    анализа ризика, водни ресурси, водна тела, рудничке воде, рударскиотпад, аналитички хијерархијски процеси, кластер анализа, математичка теоријаатрибута, функције припадности, семи-квантитативне методе
    ... Protection Agency, EPA/630/R-95/002F. 172. US EPA (2000a) Risk Characterization Handbook. Science Policy Council. U.S. Environmental Protection Agency, EPA 100-B-00-002, Washington DC. 173. US EPA (2000b) Abandoned Mine Site Characterization and Cleanup Handbook. U.S. Environmental Protection Agency ...
    ... 06-9112-5 65. Hakkou R., Benzaazoua M. and Bussiere B. (2008) Acid Mine Drainage at the Abandoned Kettara Mine (Morocco): 1. Environmental Characterization. Mine Water Environ 27: 145–159. doi 10.1007/s10230-008-0036-6 66. Harmin H. (1997) Guide to underground mining methods and applications. ...
    ... Atlas Copco, Stocholm. 67. Helena B.A., Vega M., Barrado E., Pardo R. and Fernandez L. (1999) A case of hydrochemical characterization of an alluvial aquifer influenced by human activities. Water, Air and Soil Pollution 112, Pp. 365-387. Небојша Б. Атанацковић Докторска дисертација 238 ...

  • Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia

    Predrag Radović, Miloš Radonjić, Emmanuel Billia (2020)
    Finds of Pleistocene rhinoceros are rare in Serbia, and only one species (the woolly rhinoceros Coelodonta antiquitatis Blumenbach, 1799) has been reported so far. The current paper presents the dental material of an extinct so-called Hundsheim rhinoceros, Stephanorhinus hundsheimensis Toula, 1902 from Bogovina Cave (East ern Serbia). Both the morphological and metric characteristics of the teeth are consis tent with the attribution to S. hundsheimensis. Unfortunately, the rhinoceros material originated from an uncertain geological context, so there is no ...
    rhinoceros, Stephanorhinus hundsheimensis, Serbia
    ... Milanović, S. 2015. Speleology and cave diving as a base for tapping structure design, p. 470- 489. In Stevanović, Z. (ed.), Karst Aquifers - Characterization and Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-12850-4 Mkrtchyan, R., Belmaker, M., Hynek, S., Belyaeva, E., and Aslanian ...

  • Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals

    Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)
    As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...
    nanocrystal, curcumin, top-down method, wetball milling

  • Sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja

    Anđela Jovanović (2024)
    Predmet i cilj pisanja ovog rada su sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja. Prilikom ovih istraživanja, ispitivan je sistem REE2O3–V2O5–KF, gde REE predstavlja trovalentni katjon izabranih elemenata retkih zemalja (Y, Sm, Eu, Gd, Er, Yb). Ovo istraživanje bazirano je na sintezi kristala, nakon čega su dobijeni kristali posmatrani pod binokularnom lupom, analizirani metodom rendgenske difrakcije na polikristalnom materijalu (XRPD) i metodom skenirajuće elektronske mikroskopije sa energetsko-disperzivnom spektroskopijom (SEM-EDS), kako bi se utvrdile karakteristike dobijenih kristala. ...
    elementi retkih zemalja, sinteza kristala metodom fluksa, vanadati alkalnih metala, rendgenska difrakcija, SEM-EDS metoda

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... and Synthesis of Ceramic Oxides, John Wiley & Sons,Inc., NewYork. Rao C. N. R., Muller, A., Cheetham, A.K., (eds.) (2004): The Chemistry of Nanomaterial Synthesis, Properties and Applications, 2 Vol, Wiley-VCH, Weinheim, Germany. Rao C.N.R., Thomas P.J., Kulkarni G.U., (2007): Nanocrystals Synthesis ...
    ... (DTA). Experimentally determined optimal sintering temperature and they are in the range of 1350 to 1450 o C. Structural and microstructural characterization of Ca1-xGdxMnO3 (x= 0.05; 0.1; 0.15; 0.2) nanopowders were performed by XRPD diffraction tehnique and Rietveld refinement. Monophase composition ...
    ... ce manganites. Advances in Physics, Vol. 48, No. 2, 167-293. Cong, L., He, T., Ji, Y., Guan, P., Huang, Y., Su, W. (2003): Synthesis and characterization of IT-electrolyte with perovskite structure La0.8Sr0.2Ga0.85Mg0.15O3-δ by glycine–nitrate combustion method, Journal Of Alloys And Compounds ...

  • Supstitucione reakcije Pd(II) kompleksa sa biološki važnim biomolekulima

    Aleksandar M. Mijatović, Jovana Bogojeski (2017)
    Kompleksi Pd(II), supstitucione reakcije

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... proppant embedment and its damage to fracture sconductivity. Nat. Gas Ind. 28(2), 99–101. Mahdi K., Gheshlaghi R., Zahedi G., Lohi A. (2008) Characterization and modeling of a crude oil desalting plant by a statistically designed approach, Journal of Petroleum Science and Engineering, Volume 61 ...
    ... ation carbon membrane and application in oily wastewater treatment, Sep. Purif. Technol., 51, 80–84. Sood N., Lal B., 2008. Isolation and characterization of a potential paraffin- waxdegrading thermophilic bacterial strain Geobacillus kaustophilus TERINSM for application in oil wells with paraffin ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... proppant embedment and its damage to fracture sconductivity. Nat. Gas Ind. 28(2), 99–101. Mahdi K., Gheshlaghi R., Zahedi G., Lohi A. (2008) Characterization and modeling of a crude oil desalting plant by a statistically designed approach, Journal of Petroleum Science and Engineering, Volume 61 ...
    ... ation carbon membrane and application in oily wastewater treatment, Sep. Purif. Technol., 51, 80–84. Sood N., Lal B., 2008. Isolation and characterization of a potential paraffin- waxdegrading thermophilic bacterial strain Geobacillus kaustophilus TERINSM for application in oil wells with paraffin ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... Serbian researchers on various aspects of biodiesel production, characterization and utilization published in the last decade Ref. Aim of the study Catalyst Feedstock Transesterification conditions (Bazargan et al. 2015) Characterization of the produced catalyst and verification of its activity ...
    ... molar ratio 6:1, catalyst to oil ratio 5-10 wt%, 60% (Kostić et al. 2018) Kinetic modelling and optimization of transesterification and characterization of the produced biodiesel KOH and quicklime White seed oil mustard Methanol to oil molar ratio 6.1:1-1.6:1, optimal catalyst to oil ratio ...
    ... by response surface methodology and kinetic | KOH Hempseed oil Methanol to oil molar ratio 6.5:1, 2015) modelling of transesterification and characterization of the optimal catalyst to oil ratio 1.2 wt%, 43"C produced biodiesel (Rajković et al. Optimization by response surface methodology of|KOH ...

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... groundwater parameters regime monitoring (temperature, chemical composition, flow capacity). For the purpose of geothermal wa- ter and reservoir characterization, the D’Amore method and diagram was applied [42]. The method is based on the determination of six main genetic parameters, mainly based on ca ...

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... M, Miljanić Š. 2007. Natural radioactivity of some spring and bottled mineral waters from several central Balkan sites, as a way of their characterization. J Serb Chem Soc. 72(6): 621 – 628. 168 77. Joksimović M, Pavlović AM. 2014. Conditions and possibilities of direct utilisation of ...
    ... Kovačević J, Todorović M, Ćuk M, Papić P. 2016. Geochemical study of U. Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area. CJOEES 11(2): 463 – 474. 87. Krešić N. 1988. Semi-covered karst aquifers in the ...
    ... Ćuk M, Andrijašević J, Šišović J, Papić P. 2015. Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization. In: Papić P. (ed.). Mineral and Thermal Waters of Southeastern Europe. Springer International Publishing Switzerland, pp. 81 – 95. 175 ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... processing of anisotropy of magnetic susceptibility measured on groups of sediments. Studia Geophys Geodynamics, 22, 50–62. Jelı́nek, V. (1981). Characterization of magnetic fabric of rocks. Tectonophysics, 79, T63–T67. Jovanović, M.M. (2003). Tertiary basaltic rocks in Serbia. PhD thesis, University ...

  • Back-arc underplating provided crustal accretion affecting topography and sedimentation in the Adria microplate

    Paolo Mancinelli, Vittorio Scisciani, Cristina Pauselli, Gérard M. Stampfli, Fabio Speranza, Ivana Vasiljević (2021)
    Supported by evidence of deep crustal sources for the observed magnetic anomalies in Central Italy and by outcropping gabbros in the Croatian archipelago, we model the observed gravity and magnetic anomalies in the Central Adriatic Sea and surroundings. We suggest that the major magnetic anomalies in the area are related to a wide underplating and propose that this volume represents the first stage of the back-arc Adria continental breakup in Early Permian times. During the Palaeotethys-Adria collision, underplating has ...
    Underplating, akrecija kore, Magnetske anomalije, Jadranska ploča

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija