Monoclinic pyrrhotite from Norseman, Western Austra"lia, has lamellae of submicrometer thickness, identified by microprobe and electron diffraction as magnetite. The lamella zurface is (111) of magnetite parallel to (001) of pyrrhotite, corresponding to a close fit of close-packed planes of the two structures' The perfect lamellar nature of the magnetite in unaltered pyrrhotite indicates origin...

The article describes the effect of fluxing ability (FA) ores used as a flux on slag formation and copper losses. In Kazakhstan, at Balkhash smelting plant (BCSP), currently fluxes have very low SiO2 content—about 62%—whereas Al2O3 content is 12%. Its was estimated, it shown that silica an exceedingly FA. Only half participate in formation. To obtain slags with magnetite concentration, consider...

2 The Workshop on Current Problems in Physics 2013 (WCPP'13) is already the sixth in a series of meetings which represent annual forum for the Polish and Ukrainian physicists community to present their latest scientific results. Usually, the meetings are attended by representatives of other countries, too. An important feature of the conference is the possibility for young scientists to present...

Abstract The inorganic conductive network provides an essential channel for electron transport and supports the biogeochemical process in sediments, but mechanism of is not well understood. In this work, theory circuit electronics was applied to build a three-dimensional (3D) resistivity simulation model exploring analysing effect particle size on characteristic network. order simulate real sed...

In this research controlled coating of magnetite (Fe3O4) nanoparticles with SiO2 was investigated. The Fe3O4 nanoparticles were synthesized via chemical co-precipitation and then coated by silica according to Stober method. Effects of tetra ethyl ortho silicate (TEOS) concentration and ethanol to TEOS on the coating thickness were inves...

In this work, we describe an experimental investigation on the colloidal stability of suspensions of three kinds of particles, including magnetite, poly(lactic acid) (PLA), and composite core/shell colloids formed by a magnetite core surrounded by a PLA shell. The experiments were performed with dilute suspensions, so that recording the optical absorbance with time gives a suitable indication o...

Based on chelation effect between iron ions and amino groups of chitosan, in situ mineralization of magnetite nanoparticles in chitosan hydrogel under ambient conditions was proposed. The chelation effect between iron ions and amino groups in CS-Fe complex, which led to that chitosan hydrogel exerted a crucial control on the magnetite mineralization, was proved by X-ray photoelectron spectrum. ...

This work is devoted to the preparation of magnetite-covered clay particles in aqueous medium. For this purpose, magnetite nanoparticles were synthesized by a coprecipitation method. These magnetic particles are adhered to sodium montmorillonite (NaMt) particles in aqueous suspensions of both materials, by appropriate control of the electrolyte concentrations. The best condition to produce such...

Magnetite in mixture with metallic iron in indoor dust samples was examined using several magnetic analyses, thermomagnetic curves of the magnetic susceptibility and the induced magnetization vs. temperature, hysteresis loops, and first-order reversal curves. The study of the magnetic properties was supplemented by the analysis of chemical elements and electron microscopic observation. The meta...

Trichloroethylene (TCE) is a dense liquid chemical often used as an industrial degreaser. TCE poses public health risks as a probable carcinogen, with growing evidence of negative effects to developmental, reproductive, and hepatic health. Traditional cleanup of aquifers contaminated with TCE is expensive, difficult, and inconsistent because TCE sinks to the bottom of an aquifer, making access ...