Abstract The Niederschlag fluorite-barite vein deposit in the Western Erzgebirge, Germany, has been actively mined since 2013. We present results of a first comprehensive study mineralogy, petrography, fluid inclusions, and trace element geochemistry fluorite related to deposit. Two different stages mineralization are recognized. Stage I is older, fine-grained, associated with quartz, forms com...

Soil alkalinisation generally constitutes a major threat to irrigated agriculture in the semiarid regions of West Africa. The improvement of sodic soils is generally difficult and expensive. However, a recent study in the Niger valley in NIGER, reveals that a natural dealkalinisation is possible under natural conditions in a semi-arid climate. Transformation of non-saline sodic soil into brown ...

The recovery of scheelite from calcium-bearing carbonate ores by foam flotation is challenging due to its low separation efficiency. This study investigated the effect pentasodium diethylenetriaminepentaacetate (PD) on surface properties and fluorite. For this purpose, we performed micro-flotation tests carried out zeta potential measurements, as well Fourier transform infrared (FT-IR) X-ray ph...

Stabilized fluorites and pyrochlores with different types of substitution in the (Nd2O3 ? ZrO2 system (NdZrO)) have been studied by Raman spectroscopy, X-ray diffraction, impedance spectroscopy methods. Ionic proton conductivity maps for 9 compositions NdZrO are presented. Oxygen partial pressure measurements show a typical ionic conductor behavior, significantly increase (Nd2?xZrx)Zr2O7+x/2 (x...

Flotation is, doubtless, the most important process among the various techniques used for the treatment of ore. This generalpurpose technique allows the treatment of several complex ores (lead zinc, copper zinc), sulphides (copper, lead, and zinc), oxides (hematite, quartz), oxidized minerals (malachite, cerusite) and even non-metal ores (fluorite, phosphate, coal). Due to the flotation, it is ...