This study reports the contents and sources of chromium, nickel cobalt, as well Al, Ca, Mg, K, Fe Mn in Vojvodina regions Srem Central Banat area soil samples. Different methods were applied to identify studied elements classify latter geogenic and/or anthropogenic: modified Tessier sequential extraction, calculation ratio E/Al, XRPD, correlations cluster analysis. The sampling methodology was according GEMAS project. results show that increasing content cobalt detected soils can be...

Abstract: The crystal structure of ludwigite from Vranovac ore deposit (Boranja Mt., Serbia) was refined using the X‐ray powder diffraction (XRPD) Rietveld method in space group Pbam to a final R B =7.45% and F =5.26%. It has unit cell dimensions of: = 9.2515(2) Å; b 12.3109(2) c 3.03712 (7) V 345.91(1) Å 3 . calculated distances angles are mostly good agreement with Mg 2+ ‐Fe substitutions across M(1) M(3) sites, as well Fe 3+ ‐Al replacement M(4) site. However, mean observed M(2)‐O...

Regional tectonic synthesis suggests that a segment of the bipartite eastern Gondwana-type Carpathian-Balkan nappe-stacked Getic/Kučaj/Supragetic basement (eastern Serbia) experienced Cambro-Ordovician Cenerian (Sardic) accretionary-type deformation. The Ordovician Alpine Getic/Kučaj nappe exposes an earlier-mapped shallow-marine transgressive-type Fe-silicate-rich ironstone sequence. is used as second-order evidence hitherto untraceable tectonically-driven unconformity. Early Paleozoic...

Abstract Five celestine crystals were sampled from the (palaeo)surface intervening between late Miocene to Pleistocene basaltic sequences of Jabal Eghei (Nuqay) volcanic province in southern Libya and then characterised by applying a combination SEM–WDS, ICP/OES, PXRD IR methods. Colour variations related minerogenetic frameworks also investigated. Three samples have greenish-blue-to-blue colour (480.4–482.5 nm), whereas other two blue–green (cyan; 489.1–494.1 nm). The purity ranges...

Studied sludge samples are composed of major goethite and quartz; less clay minerals; minor magnetite, hematite, clinochlore todorokite. They have quite similar qualitative, but different semi-quantitative compositions. There particle size distributions between the samples, highest contents ~50% belongs to finest classes <6 μm. Among within almost identical iron present; indicating their mineral compositions, which make these systems very complex for further separation processes. Sludge...

In this paper, grandite core with Grs 64±1 Adr 36±1 Sps 2 composition was crystallographically studied. This represents zone A of the macroscopically visible five A–E zones optically anisotropic 58–64 36–42 grandite. The applied procedure includes detailed analysis powder diffraction patterns, and Rietveld refinements crystal structures in a series 18 space groups two mixtures, which were followed by comparative R -values, site occupancy factors, bond lengths angles. Synthesis all presented...

Five typical bauxite samples from three ore deposits the wider area of Grebnik Mt. (Metohija, Serbia) were examined with optical microscopic, X-ray powder diffraction (XRPD) and chemical methods. The occurrences in bauxites studied described presence major minerals was determined: diaspore, boehmite hematite; minor minerals: quartz, goethite, rutile, kaolinite hydro-hematite; as well anatase, brookite, magnetite chromite, which occur only sporadically. According to quantity main Al-bearers,...

The grossular garnet from rodingite-type rock the Suva Česma area in western Serbia is characterized with its weak anisotropic nature. Because anisotropy could indicate a non-cubic lower symmetry, SEM-EDS and Rietveld powder refinement methods were used. results have shown that has (Ca3.00Mn0.01)3.01(Al1.82Fe0.15Ti0.02)1.99(Si2.97Al0.03)3.00O12 chemical composition (i.e., Grs91Adr08), which can be more specifically explained as ferric iron containing grossular. next step further used...

Abstract: The macroscopically‐zoned grandite from the garnetite skarn of Meka Presedla (Kopaonik Mountain, Serbia) was studied with optical microscopy, electron microprobe analysis (EMPA), Fourier transform infra‐red (FT–IR), and Raman methods. EMPA results indicate that main core–rim compositional variations (Ca 2.93–2.97 Mn 0.05–0.06 Mg 0.00–0.01 Al 1.14–1.26 Fe 3+ 0.72–0.83 Ti 0.00–0.02 Si 2.97–3.02 O 12 ) slightly differ along zones, showing evidence for a quasi‐cyclic alternation...

Four macroscopically visible B–E (rim) zones of the natural grossular-andradite garnet with Grs 58 –64 Adr 36 –42 Sps 2 composition were crystallographically studied. The applied procedure includes Rietveld refinements crystal structures in a series six space groups, which followed by comparative analysis R -values, site occupancy factors, and bond lengths angles. It was established that it crystallized rhombohedral ‾ 3 c group. Various polyhedral distortions structural order-disorder...

Phosphate tungsten bronze (WPB) and phosphate molybdenum (MoPB) were synthesized modified with rhenium. The existing phases established by X-ray powder diffraction (XRPD), electron paramagnetic spectroscopy (EPR) Field emission scanning microscopy (FESEM). electroactivity of samples, without rhenium for hydrogen evolution reaction (HER) was tested. influence carbon black presence in the catalytic ink on electrochemical activity investigated. Collected results provide insight into effects...

Our novel research on Mn content as markers of transgressive events/eustatic changes in marine carbonate environments not only provides a fresh perspective the development Tethyan Ocean and its branches, "Alpine Tethys", key area study our field, but also offers practical applications. Namely, deposits, often formed deep to middle-depth associated with regional extension, are vital numerous Mesozoic Tethys-related oceans spreading across Balkans. The role is vital, especially indicating...

This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range Grs 45-58 Adr 40-52 Alm 2-3 in core and 70-97 2-29 Sps 1 rim displaying anisotropy zoning.In spite of wide compositional variations near end-member andradite (Adr > 90) are generally isotropic.Fe-rich rims exhibit LREE depletion flat HREE pattern with weak negative Eu anomaly, including higher As W contents.On other side, Fe-poorer shows REE without any significant enrichment or REE, except...

The calcium phosphate tungsten bronze (Ca-PWB) has been synthesized and characterized (TGA, DSC, XRPD, FTIR, SEM). influence of solid insoluble materials Ca- PWB, as well lithium doped (Li-PWB) cation free (PWB) bronzes on the oscillatory Briggs-Rauscher (BR) reaction dynamics, is compared. results show that doping with Li Ca reduces sensitivity BR towards addition. These findings suggest usage an innovative method for testing different properties material. behavior PWB in significantly...

In this work, synthesized 12-tungstenphosphoric acid (H3PW12O40 ? nH2O; PWA) was further ionically exchanged with Fe3+ ions, which led to the formation of 12- tungstophosporic iron salt, (FePW12O40 Fe-PWA). Fe-PWA then subjected thermal analysis (TGA/DTA), determining phase transition temperature 576?C from its corresponding phosphate tungsten bronze doped iron, Fe-PWB. Using X-ray powder diffraction (XRPD), Fourier-transform infrared spectroscopy (FTIR), and Scanning electron microscopy an...