Magnetic Susceptibility of Some Sulfide Minerals

Sulfur Isotope Geochemistry of Sulfide Minerals

Extraction separation and electrothermal atomic absorption spectrometric determination of thallium in some sulfide minerals.

A method for thallium determination in some sulfide minerals (sphalerite, galena, orpiment and realgar) by electrothermal atomic absorption spectrometry has been proposed. Mineral samples were dissolved in a mixture of HNO3 and HCl. The effect of interfering elements (Zn, Pb and As) on the determination of Tl in the investigated minerals was studied. These investigations show that it is not pos...

Structural similarities of some secondary lead minerals

Some structural analogies found in tsumebite, vauquelinite, forns.cite, and brackebuschite make it possible to place these secondary lead minerMs in the s~me series with general formula Pb~MeII(Z)(XQ)(Y04), where MelI is a bivalent cation as Cu 2+ or Mn 2+, Z is the hydroxyl group or the w~ter molecule, X is S, Cr, or V, ~nd Y is P, As, or V. Some crystallochemical considerations are developed ...

ANALYSIS OF SOME MAGNETIC PROPERTIES OF DILUTED MAGNETIC SEMICONDUCTORS

The susceptibility and specific heat experimental results of the diluted magnetic semiconductors (DMS) are incorporated in a model based on short-range as well as long-range interaction in a random may of magnetic ions. The so-called nearestneighbor pair approximation (NNPA) is applied. It appears that the calculated values of zero field specific heat and Curie-Weiss temperature based on th...

a study of magnetic susceptibility in some aquic and non-aquic soils of fars province

soil drainage conditions significantly affect the chemical properties of soil, particularly type and the extent of iron oxides. soil magnetic susceptibility (?) has a close relationship with drainage conditions. eight soil profiles, in four regions of fars province, with aquic and non-aquic soil moisture regimes were studied to determine the effect of drainage conditions on ? and on chemical fo...