Predrag Dabić

University of Belgrade · Faculty of Mining and Geology

The effect of “buried stone” has been studied on the intensities of degradation processes present on the kersantite rock built into the monument Small Staircase. The investigations were conducted on sound rock from the quarry and damaged stone built-in the monument. While some staircase parts were underground for 90 years, most of the stone element...

The polymetallic Cu-Au-Ag-Pb-Zn deposit of Čoka Marin, in which the dominant minerals are pyrite and copper sulfides, consists of three ore bodies of smaller dimensions and reserves, and is located in eastern Serbia about 15 km south of Majdanpek. It belongs to the deposits of massive copper sulfides of the well-known Bor metallogenic zone. In the...

The new ambient-temperature hexagonal (space group P 6 3 /mmc ) polymorph of tripotassium ytterbium(III) disilicate (β-K 3 YbSi 2 O 7 ) has been synthesized by the high-temperature flux method and subsequently structurally characterized. In the course of the temperature-dependent single-crystal diffraction experiments, a phase transformation of β-K...

As a part of the research of the flux technique for growing alkali rare-earth elements (REE) containing silicates, tripotassium europium disilicate, K3EuSi2O7, has been synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in the space group P63/mcm. In the crystal structure of the title compound, one part of the Eu cat...

This study was focused on the mineralogical characterization of four raw clay samples from Dobrodo deposit. Several different analytical methods were applied in an effort to analyze their chemical and mineralogical composition, morphology and physical properties (color, plasticity, specific surface area (SSA), particle size and cationic exchange ca...

Two polymorphs of tripotassium erbium disilicate, K 3 ErSi 2 O 7 , were synthesized by high-temperature flux crystal growth during the exploration of the flux technique for growing new alkali rare-earth elements (REE) containing silicates. Their crystal structures were determined by single-crystal X-ray diffraction analysis. One of them (denoted 1...

The crystal structure of cosalite from the Trepča orefield was refined in the orthorhombic space group Pnma [a = 23.7878 (9), b = 4.0566 (3), c = 19.1026 (8) Å, V = 1843.35 (17) Å3, Z = 2] from single-crystal data (MoKα X-ray diffraction, CCD area detector) to the conventional R1 factor 0.031 for 1516 unique reflections with I > 2σ(I). The chemical...

Single-crystal growth experiments in the system CsF-Er2O3-SiO2 resulted in the simultaneous crystallization of two chemically related compounds within the same run: Cs2Er[Si6O14]F (phase I) and Cs2Er[Si4O10]F (phase II). They represent the first examples for cesium erbium silicates containing fluorine. Basic crystallographic data are – phase I: spa...

Single-crystal X-ray diffraction of Cs 3 ScSi 6 O 15 shows the presence of main reflections and satellite reflections up to the fourth order along the c* direction. The (3+1)-dimensional incommensurately modulated structure was solved in superspace group X{\bar 3}m1(00\gamma)0s0 [ a = 13.861 (1), c = 6.992 (1) Å, V = 1163.4 (2) Å 3 ] with a modulat...

This study is focussed on a comprehensive investigation on the state of pollution of Danube and Sava rivers in Belgrade region. Different complementary analytical approaches have been used covering both (i) organic ccontaminants in river water by target analyses of hormones and neonicotinoids as well as non-target screening analyses and (ii) heavy...