Electronic property simulation of the narrow-gap semiconducting rhenium and ruthenium silicides has been performed by the linear muffin-tin orbital method (LMTO) within the local density approximation. ReSi1.75 was found to have an indirect gap value of 0.16 eV. The first direct transition with ...

In this research it is shown that thermoelectric higher manganese silicides (HMS) compounds produced by arc-melting followed by hot pressing exhibited textured behavior, due to the different number of Mn–Si bonds on the [00l] direction over the [hk0] direction, leading to ∼10% ZT enhancement i...

The search for new materials capable of replacing nickel-based superalloys in aerospace applications has increased rapidly in the recent years. One of the candidates for this purpose is nickel aluminide NiAl provided that its main drawback, namely the inferior fracture toughness at room temperat...

The optical and transport properties of rhenium silicide thin films epitaxially grown on Si(111) have been studied. On the one hand, the analysis of the optical spectrum above the band gap energy confirms the semiconducting character of the samples. Moreover, the absorption coefficient prefactor...

Transport properties of semiconducting rhenium silicide ReSi1.75 were studied both experimentally and theoretically. For this high quality ReSi1.75 single crystals were grown by the zone melting technique with radiation heating and their resistivity and Hall coefficient were investigated. The ro...

Reactions of [{Re6Q8}Br6]4−/3− (Q = S, Se) with molten imidazole lead to the formation of two new neutral cluster complexes [{Re6Q8}(imzH)4(imz)2] (imzH = imidazole). The interaction of [{Re6Q8}(imzH)4(imz)2] with hydrohalic acids resulted in cationic complexes [{Re6Q8}(imzH)6]X2 (X = Cl, Br). A...

Solid-state molybdenum sulfide clusters with a nonstoichiometric sulfur-deficient site, CuxMo6S8−δ (x = 2.94 and δ ≈ 0.3) and Mo6S8–δ (δ ≈ 0.4), catalyze the dehydrogenation of cyclohexene, the hydrogenation of alkyne, alkene, aldehyde, ketone, and nitrobenzene, and the hydrogenolysis of ...

A facile and cost effective AACVD procedure for the synthesis of platinum thin films has been reported using newly synthesized Pt-dialkyldithiocarbamate complexes, [Pt(S2CNR2)] (where R = isobutyl, iBu (1); benzyl, Bz (2)), as single source precursors. The structural characterization of the dith...

Magmatic Fe-Ni-Cu-Co sulfide melt inclusions are preserved within cumulate and intercumulate phases (apatite, plagioclase, olivine, ilmenite) in the mineralized Caribou Lake Gabbro, a marginal subalkaline-alkaline mafic-ultramafic rock assemblage that forms part of the multiphase Blatchford Lake...

The extraction and stripping behaviors of Pt(IV) from acidic chloride media by 2,2-diheptyl-1,1,3,3-tetramethylguanidinium bromide were investigated. The extraction of Pt(IV) was carried out by modulating various parameters such as concentration of the extractant, temperature, and concentration ...

The North Atlantic Igneous Province (NAIP) is a large igneous province (LIP) that includes a series of lava suites erupted from the earliest manifestations of the (proto)-Icelandic plume, through continental rifting and ultimate ocean opening. The lavas of one of these sub-provinces, the British...

High MgO volcanic rocks having elevated concentrations of Ni and Cr are potential hosts for platinum group elements (PGE) owing to their primitive mantle origin and eruption at high temperatures. Though their higher PGE abundance is economically significant in mineral exploration studies, their ...

Low-gradeplatinum-group element mineralisation in the Volspruit Sulphide Zone is sulphide-poor (

The platinum-group element (PGE) potential of four chromite mining districts in southern and south-eastern Iran was investigated using geochemical and mineralogical methods. A total of 20 mines and prospects were sampled in the Neyriz ophiolite, the Abdasht and Sikhuran complexes in the Esfandag...

Polycrystalline samples of tin monosulphide were prepared by passing H2S through an acidic solution of stannous chloride. The structure and the composition of the samples were confirmed by X-ray diffraction and energy dispersive analysis of X-rays. Hall measurements showed the samples to be n ty...

Pure and praseodymium-doped thin films of Ge30Ga5Se65 amorphous system were prepared by the pulsed laser deposition (PLD) technique. The composition of the prepared films was close to the composition of the used targets of bulk chalcogenide glass. The structure of the prepared films was also clo...

The new compounds NaSm2Se3 and MSm8Se12 (M  Na, Ca) were prepared by reduction of Sm2Se3 with sodium and calcium respectively. Synthesizing the educt, single crystals of Sm2Se3 in the U2S3-type structure were obtained for the first time. All compounds were characterized by chemical analysis an...

Praseodymium fluoride (PrF3) thin films were deposited on Ge(1 1 1) and zinc selenide substrates by molybdenum boat evaporation method. The crystal structures of thin film were characterized using XRD technique and the texture coefficients were calculated. The texture of praseodymium fluoride fi...

Praseodymium-doped selenide thin films are deposited by radio frequency magnetron sputtering on thermally oxidized silicon wafers and undoped selenide layers. Ridge waveguides are then processed using photolithography and dry etching techniques. Under optical pumping at 1.55 μm, broadband guide...

This contribution reports on detailed experimental and numerical investigations of both near-infrared (NIR) and mid-infrared (MIR) photoluminescence obtained in praseodymium trivalent ion doped chalcogenide-selenide glass fiber. The experimental analysis allows for the identification of the radi...