The coastal area of the Kavala district, Northern Greece, is characterized by minerals enriched in rare earth elements (REE). present study focuses on mineralogy black sands from six different locations and comprehensive mineral chemistry REE-bearing minerals, allanite-(Ce), epidote, monazite, thorite, zircon titanite. Allanite-(Ce) most important carrier light REE (LREE) studied sands, reachin...

The mining of material resources requires knowledge about geogenic and anthropogenic deposits, in particular on the location of the deposits with the comparatively highest concentration of raw materials. In this study, we develop a framework that allows the establishment of analogies between geological and anthropogenic processes. These analogies were applied to three selected products containi...

The paper is devoted to a method for determining the power transferred by loop heat pipe as part of spaceborne exchanger when significantly changes spacecraft rotates around Earth. proposed allows calculate excessive removed radiation from radio electronic equipment (REE) in space. parameter behaviour time shall be known mathematical modelling thermal state spacecraft. Readings temperature sens...

Wide band-gap semiconductors doped with luminescent rare earth elements (REEs) have attracted recent interest due to their unique optical properties. Here we report on the synthesis of the transparent conducting oxides (TCOs) indium oxide and indium tin oxide (ITO) doped with neodymium, europium and terbium. The solid solubility in the systems was investigated and isothermal phase diagrams at 1...

The development of soil conservation plans and evaluation of spatially distributed erosion models require knowledge of rates of soil loss and sedimentation on different landscape elements and slope positions. Characterization of soil erosion rates and patterns within watersheds is important for the understanding of erosion processes and landscape evolution. Experimental data that show spatial t...

Refractory inclusions in primitive meteorites are the oldest objects formed in the Solar System. They exhibit large massdependent isotopic effects in many elements, including Si, Mg and Ca, indicative of their complex origin. We report data for both mass-dependent (d) and mass-independent (e) Ca isotopic effects, and rare earth element (REE) abundances in six refractory inclusions from the Alle...

Abstract This paper is dedicated to the isotope-geochemical study of zircon from riebeckite granites Verkhnee Espe rare earth-rare metal deposit and specification its U–Pb age. Zircon massif peculiar in high content non-formula elements (up 43000 ppm REE, up 22000 Y, others) demonstrates a clearly expressed heterogeneous structure. The central rim zones show “magmatic” rare-earth element (REE) ...

Rare earth elements (REE) used to be taken as tracers of geological origin for fluvial transport. Nowadays their increased applications in innovative environmental-friendly technology (e.g. in catalysts, superconductors, lasers, batteries) and medical applications (e.g. MRI contrast agent) lead to man-made, elevated levels in the environment. So far, no regulatory thresholds for REE concentrati...

The tuff, a part of coal-bearing strata, in the Zhongliangshan coal mine, Chongqing, southwestern China, hosts a rare metal deposit enriched in rare earth elements (REE), Ga and Nb. However, the extraction techniques directly related to the recovery of rare metals in coal-bearing strata have been little-studied in the literature. The purpose of this paper is to investigate the extractability of...

Characteristic spectral parameters such as the wavelength and depth of absorption bands are widely used to quantitatively estimate the composition of samples from hyperspectral reflectance data in soil science, mineralogy as well as vegetation study. However, little research has been conducted on the spectral characteristic of rare earth elements (REE) and their relationship with chemical compo...