A5048942703- Crystal Structures and Properties
- Chemical Synthesis and Characterization
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Condensed Matter Physics
- Crystallization and Solubility Studies
- Crystal structures of chemical compounds
- Polyoxometalates: Synthesis and Applications
- Solid-state spectroscopy and crystallography
- Zeolite Catalysis and Synthesis
- Nuclear materials and radiation effects
- Metal Extraction and Bioleaching
- Organometallic Compounds Synthesis and Characterization
- Thallium and Germanium Studies
- Inorganic Fluorides and Related Compounds
- Catalysis and Oxidation Reactions
- Arsenic contamination and mitigation
- Iron-based superconductors research
- Inorganic Chemistry and Materials
- Geological and Geochemical Analysis
- Crystallography and molecular interactions
- Radioactive element chemistry and processing
- Cold Atom Physics and Bose-Einstein Condensates
- Luminescence Properties of Advanced Materials
- Heavy metals in environment
University of Vienna
2015-2024
TU Wien
2010-2024
Natural History Museum Vienna
2019-2020
University of Belgrade
2007-2019
Laboratoire de Chimie Moléculaire et Thioorganique
2015
Massachusetts Institute of Technology
2015
Institute for Technology of Nuclear and other Mineral Raw Materials
2009-2012
In the Lojane area (North Macedonia) ores of Sb (stibnite), As (realgar), and Cr (chromite) were mined processed in a metallurgical plant until 1979.Over one million tons flotation tailings containing As, Sb, other hazardous substances are located an open dump site for waste created by mine.The is completely unprotected, its orange color reflects very high concentration arsenic (fine-grained realgar superficially altered to pararealgar).In order better understand weathering behavior these...
Secondary minerals could be effective scavengers of toxic arsenic (As) and thallium (Tl). In environments polluted by mining, these elements are abundant both in acid rock/mine drainage scenarios, as well carbonate-buffered environments. this study we have investigated the behavior As Tl during weathering mine waste dumps an associated technosol sample from Crven Dol locality (Allchar Tl–As–Sb–Au deposit, North Macedonia) contaminated with up to 142 g kg−1 18 Tl, making it As- Tl-extreme...
Although North Macedonia covers only 0.7 % of the Earth's surface, it contains 3 world's mineral deposits (Jovanovski et al. 2018). Both historical and recent mining operations in country have left extensive waste deposits, particularly from focused on exploration antimony (Sb), arsenic (As), chromium (Cr), copper (Cu), lead (Pb), zinc (Zn) thallium (Tl). Over past six years, we intensively studied mineralogy geochemistry two abandoned Lojane, a former Sb-As-Cr mine, Allchar, Tl-As-Sb-Au...
The laterite Ni-smelting operations at Vozarci, Republic North Macedonia have produced large amounts of smelting wastes dumped in the close vicinity smelter. We examined phase composition and chemistry various types slags (electric furnace slags, converter slag, magnetic slag) with special focus on phases containing potentially toxic elements terms their mineralogy, chemical composition, responses to weathering. Electric contain between 35 47 wt.% SiO2, 21–40 Fe2O3, 13–23 MgO; are Fe-rich...
X-ray diffraction analysis of single crystals three new arsenates adopting apatite-type structures yielded formula Sr(5)(AsO(4))(3)F for strontium arsenate fluoride, (I), (Sr(1.66)Ba(0.34))(Ba(2.61)Sr(0.39))(AsO(4))(3)Cl barium chloride, (II), and Cd(5)(AsO(4))(3)Cl(0.58)(OH)(0.42) cadmium hydroxide (III). All are built up isolated slightly distorted AsO(4) tetrahedra that bridged by Sr(2+) in Sr(2+)/Ba(2+) (II) Cd(2+) Compounds (I) represent typical fluorapatites chlorapatites,...
Lichens are symbiotic organisms with an extraordinary capability to colonise areas of extreme climate and heavily contaminated sites, such as metal-rich habitats. have developed several mechanisms overcome the toxicity metals, including ability bind metal cations extracellular sites partners subsequently form oxalates. Calcium is essential alkaline earth element that important in various cell processes. can serve a ligand but be toxic at elevated concentrations. This study investigated...
Characterization of nanocrystalline triple perovskites synthesized by a novel modified sol–gel route instead bulk materials solid-state route.
The magnetic properties of NiAs<sub>2</sub>O<sub>4</sub>and CoAs<sub>2</sub>O<sub>4</sub>single crystals were investigated. unexpected behaviour ZFC-FC curves NiAs<sub>2</sub>O<sub>4</sub>is detected around 20 K, where the transition to ferromagnetic state has been clearly observed.
Studying the reason for formation of two structural sub-types, seven arsenate and vanadate compounds descloizite adelite groups [specifically (1) CdCo(OH)(AsO4), (2) CdCu(OH) (AsO4), (3) SrCo(OH)(AsO4), (4) SrZn(OH)(AsO4), (5) SrCu(OH)(VO4), (6) CdCo(OH)(VO4), (7) CdCu(OH)(VO4) (bold numbers throughout paper refer to these compounds)] were synthesized under low-temperature hydrothermal conditions. 1–2 6–7 are isostructural with descloizite, 3–5 adelite-group minerals several synthetic...
Abstract Single‐crystals of the polar compound magnesium hydrogen vanadate(V), Mg 13.4 (OH) 6 (HVO 4 ) 2 (H 0.2 VO , were synthesized hydrothermally. It represents first vanadate(V) among inorganic compounds. Its structure was determined by single‐crystal X‐ray diffraction [space group P 3 mc a = 12.9096(2), c 5.0755(1) Å, V 732.55(2) ų, Z 1]. The crystal consists well separated, vacancy‐interrupted chains face sharing Mg2O octahedra, with short Mg2—Mg2 distances 2.537(1) embedded in porous...
Two new compounds, Cd1.16Zn2.34(AsO4)1.5(HAsO4)(H2AsO4)0.5 (1) and Cd0.74Mg2.76(AsO4)1.5(HAsO4)(H2AsO4)0.5 (2), have been prepared hydrothermally. Their crystal structures consist of chains edge-sharing M1O4(OH0.5)2, M1aO4(OH0.5)2, M2O5(OH0.5), M2aO5(OH0.5) octahedra (M1, M1a = Zn, Cd; M2, M2a Zn for 1, M1, Mg, Mg 2) that are stacked parallel to (1 0 1) connected by the [(AsO4)0.5(AsO3(OH))0.5]2.5− [(AsO4)0.5(AsO2(OH)2)0.5]2− tetrahedra. These produce two types channels c-axis. Cd atoms...
Allchar (North Macedonia) mining area is known for anomalous background Tl concentrations. In this study, we combine accurate detection of stable isotope ratios with data on mineralogy/speciation and chemical extraction in Tl-contaminated Technosol profiles. We demonstrate that the studied soils varies significantly both concentration (500 mg/kg-18 g/kg) isotopic composition (-1.6 +3.2 ε
In this work, we investigated the extent of antimony (Sb) isotopic fractionation during weathering stibnite at supergene conditions. Antimony isotope data have been obtained from secondary Sb minerals collected Pezinok, Dobšiná (both Slovakia) and Allchar (North Macedonia) deposits mine tailings. The compositions sulfides formed on primary [Sb2S3] or in tailings grains were compared with each other. Furthermore, experimentally leaching different acids. Our study reveals a large range for...
The new layered title compound, barium di-μ-hydroxido-di-μ-vanadato-tricobaltate(II), was prepared under low-temperature hydrothermal conditions. Its crystal structure comprises Co(2+) and O(2-) ions in the Kagomé geometry. octahedral Co(3)O(6)(OH)(2) layers, made up of edge-shared CoO(4)(OH)(2) octahedra with Co on a site 2/m symmetry, alternate along c axis vanadate heteropolyhedral which Ba is 3m symmetry V symmetry. All three O atoms H atom also occupy special positions: two are sites...
We report on a simple method of locking laser to birefringent cavity using polarization spectroscopy. The birefringence the resonator permits extraction an error signal by one state as phase reference for another state. No modulation light or is required, reducing complexity setup. This producing can be used most optical resonators, even if details and eigenpolarizations are not known. technique particularly well suited fiber ring resonators due inherent unknown nature that birefringence....
Suitable single crystals of the title compound, barium dicobalt(II) bis-[orthoarsenate(V)], were prepared under hydro-thermal conditions. This phase belongs to a series compounds with general formula AM(2)(XO(4))(2), where A = alkaline earth metal, M Mg or divalent first-row transition element, and X P, As V. BaCo(2)(AsO(4))(2) is isotypic BaNi(2)(XO(4))(2) (X V As) characterized by brucite-like sheets edge-sharing CoO(6) octa-hedra (3 symmetry) parallel (001), one-third octa-hedral...