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Упит dcterms_subject_txt:X-ray diffraction

101 items

  • Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders

    Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić (2023)
    ... with the composition Cu,,Ag,O (x=0.01-0.05), a self- propagating synthesis was applied at room temperature, during which a successful reaction between metal nitrate and sodium hydroxide occurred. Prepared powders were calcinated at 700 "C for 2 h. The diffraction pattern was recorded at room ...

  • ‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions

    Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban (2020)
    Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...
    Firing, Glaze, Traditional ceramics, Provenance studies, Augite

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... . Phase transition from P21/a to A2/a space group was also verified in the IR and Raman spectra. The average particle size computed from X-ray diffraction pattern data for sphene is smaller than the average particle size obtained by scanning electron microscope, suggesting that the particles ...
    ... of Mechanical Alloying. Mater Sci Forum 1: 88-90. Bismayer U., Schmahl W., Schmidt C. and Groat L.A. (1992) Linear Birefringence and X-Ray Diffraction Studies of the Structural Phase Transition in Titanite, CaTiSiO5. Phys Chem Miner 19: 260-266. Bladh K.W., Corbett R.K., McLean W.J., and ...
    ... Groat L.A., Kek S., Bismayer U., Schmidt C., Krane H.G., Meyer H., Nistor L. and Van Trendeloo G. (1996) A synchrontron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopy study of malayaite, CaSnSiO5. Am Mineral 81: 595-602. http://www.springerlink.com/content/?Author=L.+G.+Gerasimova ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... . Phase transition from P21/a to A2/a space group was also verified in the IR and Raman spectra. The average particle size computed from X-ray diffraction pattern data for sphene is smaller than the average particle size obtained by scanning electron microscope, suggesting that the particles ...
    ... of Mechanical Alloying. Mater Sci Forum 1: 88-90. Bismayer U., Schmahl W., Schmidt C. and Groat L.A. (1992) Linear Birefringence and X-Ray Diffraction Studies of the Structural Phase Transition in Titanite, CaTiSiO5. Phys Chem Miner 19: 260-266. Bladh K.W., Corbett R.K., McLean W.J., and ...
    ... Groat L.A., Kek S., Bismayer U., Schmidt C., Krane H.G., Meyer H., Nistor L. and Van Trendeloo G. (1996) A synchrontron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopy study of malayaite, CaSnSiO5. Am Mineral 81: 595-602. http://www.springerlink.com/content/?Author=L.+G.+Gerasimova ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • 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
    ... Figure S1. X-ray diffraction patterns of lignite ash (450oC) of individual samples of boreholes GD-601 (a) and GD-603 (b) in the A field. G eo lo g ia C ro a tica Životić et al.: Distribution of major and trace elements in the Kovin lignite (Serbia) 79 Figure S2. X-ray diffraction patterns of ...
    ... 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 X- ray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spec- trometry (ICP-OES). The ...
    ... value measurements were performed on an IKA­Calorim­ eter adiabatic C 400, following the standard procedure (SRPS B.H8.318:1972, 1972). 3.4. X-ray diffraction (XRD) and SEM-EDS analysis Mineralogical analysis of forty­two (without the 28/91 and 31/91 samples) ash samples, heated to 450°C was carried ...

  • Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

    Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)
    sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija
    ... physical–chemical characterization was performed on hardened mortar samples with maximal possible cement replacement (20%) (P-20M) and included X-Ray-Structural Diffraction Analysis (XRD), infrared spectroscopy (FTIR), field emission scanning electron microscopic analysis (FESEM), and thermal analysis. The ...
    ... 20% of cement replacement may be used as constructional materials in the construction industry. Minerals 2021, 11, 925 11 of 16 3.2. X-Ray-Structural Diffraction Analysis (XRD) of the Mortar Samples Since the results of the testing of physical–mechanical properties showed that 20% was the maximal ...
    ... fumes). On hardened mortar samples with maximal possible cement replacement (20%), physical–chemical characterizations were performed and included X-ray and infrared spectrophotometry, scanning electron microscopy, and thermal analysis. Results showed the absence of new phases and the presence of only ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia

    Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović (2020)
    Earth-Surface Processes

  • Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material

    Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)
    Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...
    Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, Pyrophyllite

  • Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine

    Lazar M. Kaluđerović (2018-01-17)
    fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...
    adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon
    ... of samples was performed using the X-ray diffraction method. Results of interaction between organic complexes and herbicides were obtained using X-ray diffraction, optical, thermal and spectroscopic analysis. Based on the results obtained using X-ray diffraction, it was concluded that all examined ...
    ... Manual, 7th edition, British Crop Protection Council, pp. 377. 149 Xi Y, Ding Z., He H., Frost R. L. 2004. Structure of organoclays - an X ray diffraction and thermogravimetric analysis study. Journal of Colloid and Interface Science, 277: 116–120. Xi Y, Frost R. L., He, H. 2007. Modification ...
    ... Claassen V. P., Tjeerdema R. S. 2009.The behavior of clomazone in the soil environment. Pest Management Science, 65: 711–716. He H. P., Ray F. L., Zhu J. X., 2004. Infrared study of HDTMA+ intercalated montmorillonite. Spectrochimica Acta Part A- Molecular and Biomolecular Spectroscopy, 60(12): ...

  • Aлтерације перидотита контролисане карактером флуида на примеру харцбургита Рудника - Серпентинизација или талкизација?

    Стефан Петровић, Наталија Батоћанин (2020)
    У раду су приказани резултати испитивања серпентинисаних харцбургита Брђана (43°58'45.1" СГШ, 20°25'12.6" ИГД) и талкизираних харцбургита откривених у интервалу 429-559.8 m у истражној бушотини 330А/18 (44°07'33.2" СГШ, 20°30'28.5" ИГД) на Руднику. Узорци оба локалитета показују карактеристике резидуалних харцбургита из омотача, односно тектонита; лепидобластичне, бластозрнасте, или порфирокластичне структуре и масивне текстуре. Серпентинисани харцбургити и серпентинити Брђана су изграђени од серпентина, ретких реликата оливина и ортопироксена, акцесорног спинела, и веома ретког секундарног магнезита и магнетита. Најдоминантнији састојак (местимично гради и преко ...
    Рудник, Брђани, харцбургити, серпентинити, талк
    ... to an X-Max Energy Dispersive Spectrometer. The samples were covered with carbon using a BALTEC-SCD- 005 Sputter coating device. The results were recorded under high vacuum conditions with an accelerating voltage of 20 kV and a beam current of 0.5-1.8 nA, and - The X-ray powder diffraction (XRPD) ...
    ... (XRPD) investigation was conducted on automated multipurpose Rigaku Smartlab X-ray Diffractometer in θ-θ (the sample in horizontal position) parafocusing Bragg-Brentano geometry using D/teX Ultra 250 strip detector in 1D standard mode with CuKα1,2 radiation source (U = 40 kV and I = 30 mA). The low background ...
    ... скенирајућу електронску микроскопију коришћењем електронског микроскопа типа JEOL JSM–6610LV који је повезан са енерго- дисперзионим спектрометром типа X – Max Large Area Analytical Silicon Drift (Oxford) у условима високог вакуума. Површине полираних препарата су претходно напарене проводничким слојем ...

  • Some examples of interactions between certain rare earth elements and soil

    Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski (2021)
    Freundlich adsorption isotherm, sequential extraction, metallic ions, ICP-OES
    ... days and following that determining the hygroscopic moisture content. Mineralogical soil sample composition was determined by X-ray diffraction method (Rigaku SmartLab, X-ray diffractometer) under the conditions provided in Table I. The humus content has been determined by volumetric method15 and the ...
    ... all three soil types has been determined. Table I. Test conditions for samples on the difractometer. Operating voltage, kV 40 Current, mA 30 X-ray radiation from the copper (Cu) anticathode, Wavelength, nm 15.4178 Scan range, 2  o 2 – 70 Step size, 2  o 0.01 Time constant, o / min 10 Scan ...
    ... achieved The diffractogram presentation on the determined mineralogical content of sand, clay and humus soil has been shown in Fig. 1. Fig. 1. X-ray diffractograms of powdered samples of sand, clay and humus type of soil Table IV shows the mineral phases of the samples and their presence in ...

  • Петролошке карактеристике тријаских карбоната у околини Толића (Мионица)

    Михаило Вујашевић (2024)
    У тријаским теренима у околини Толића код Мионице извршено је узорковање карбонатних стена које су предмет овог рада. На одабраним узорцима утврђене су петролошке карактеристике. Главни задатак овог завршног рада представља испитивање минералошких и петрографских карактеристика карбонатних стена, применом оптичке анализе, рендгенске дифракције и калциметрије. Макроскопском детерминацијом и применом Данхамове класификације испитивани узорци су сврстани у кречњаке калкаренитског до калклутитског склопа, односно mudstone, packestone и grainstone типа. Микроскопским прегледом кречњака и применом Фолкове класификације утврђен је њихов састав и ...
    тријаски карбонати, петрографске карактеристике, класификације кречњака
    ... main task of this final thesis is to examine the mineralogical and petrographic characteristics of carbonate rocks, using optical analysis, X-ray diffraction, and calcimetry. Through macroscopic determination and the application of Dunham's classification, the examined samples were classified ...
    ... HMAaJy Behu HpoOJIOpHOCT, Ia TaKO HpHJIHKOM Koputnihema peHjireHcKor 3pauePba moTpeOHo je ripujipxKXaBarTH ce rIiponHcaHHx Mepa Ha pajiy, C O03HpoM a X-3panum Mory OHTH H3y3eTHO IHITETHH TIO JPyJICKO 3/1paBJbC (IIaBkoB H mp., 2019). AHajmaHpaHH Cy CHPpaHIeHH Be3aHH y3OpnM Ca BHIHC BpcTa KpHcTAaJa ...
    ... PAJIA Me (HMe poyunTe)ba) H npe3HMe cTyJIeHTa MWUXWAO/ ·?Ž%M@Jg(& Bpoj HHneKca r' Lfg/ % CrynujckH nporpaM TQO“L/U?/JLMŠD\- {JTČW—–NA{J%A L TQU/X@MHJ (” Haciunon pana _KGJZI[\U/JWW e /\'{MW OGAAA /MW.“C“”)C W({O/HM)D* | O VAOJUAHU_ JŽČ DAONAAI ( /Maouua ) MeHrop nm:b EIA BviOJ'IeT& FD.T]V[_—E_ ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... “crystallinity” method introduced by Kiibler (1966, 1968), based on X-ray powder diffraction (XRPD). This work presents Kiibler Indices (KI) data in order to characterize the metamorphic grade of different formations. X-ray diffraction (XRD) measurements of the clay fraction (< 2 um) were carried ...
    ... the Rodina 2/65 internal standard for which the radiogenic “ČAr content averaged 13.72 + 0.12 (2o) x 10 % cm? – g ! STP after five independent determinations. The rec- ommended value is 13.71 x 10 * cm? g The decay constants recommended by Steiger and Jiiger (1977), were used for age calculation ...
    ... agreement with the Kuibler Index values obtained from Table 2 K-Ar measurements of 15 samples Sample code Geological unit fFraction (nm) K (%) Araa(x 10 5 cmž g'l) Age (Ma) + (Ma) 006E DI-PZ 2 4.814 3.36869 171.59 4.47 006E DI-PZ || 4.005 · 2.38123 146.81 3.88 008D N-Tr 2 4.308 · 2.67731 153 ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • 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.
    ... glycine–nitrate combustion method, Journal Of Alloys And Compounds, 348 [1-2], 325- 331. Cullity, B.D., Stock, S.R. (2001): Elements of X-ray Diffraction, 3rd ed., Prentice-Hall Inc., pp.167–171. Dagotto, E. (2002): Nanoscale Phase Separation and Colossal Magnetoresistance: the physics of ...
    ... 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 of all samples was revealed using XRPD diffraction and Rietveld refinement, Pnma space group but this, that all ...
    ... temperature, the density of the sintered samples, grain growth and microstructure. Keywords: Nanostructured materials, Oxides, Thermal analysis, X-ray methods, Magnetic measurements. Scientific field: Geo-sciences Field of Academic Expertise: Mineralogy UDC number: 372.85:544.2 ...

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... REE analyses. Geostandards and Geoanalytical Research 19, 1–23. https://doi.org/10.1111/j.1751-908X.1995. tb00147.x Xiao X., Zhou T., White N., Zhang L., Fan Y., Wang F. & Chen X. 2018: The formation and trace elements of garnet in the skarn zone from the Xinqiao Cu-S-Fe-Au deposit, Tongling ore ...
    ... 2020: Structural dissymmetriza- tion of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia). Powder Diffraction 35, 7–16. https://doi.org/10.1017/S0885715619000897 Ustaszewski K., Kounov A., Schmid S., Schaltegger U., Krenn E., Frank W. & Fügenschuh B. ...
    ... tration metasomatism. Mineralogical Magazine 55, 357–365. https://doi.org/10.1180/MINMAG.1991.055.380.06 Zhai D., Liu J., Zhang H., Wang J., Su L., Yang X. & Wu S. 2014: Origin of oscillatory zoned garnets from the Xieertala Fe–Zn skarn deposit, northern China: In situ LA–ICP-MS evidence. Lithos 190–191 ...

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

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