Physicochemical Characterization and Antimicrobial Properties of Lanthanide Nitrates in Dilute Aqueous Solutions.

This work presents the results of studying dilute aqueous solutions of commercial (NO) · HO salts with = Ce-Lu using X-ray diffraction (XRD), IR spectroscopy, X-ray absorption spectroscopy (XAS: EXAFS/XANES), and pH measurements. As a reference point, XRD and XAS measurements for characterized (NO) · HO microcrystalline powder samples were performed. The local structure of -nitrate complexes in 20 mM (NO) · HO aqueous solution was studied under total external reflection conditions and EXAFS geometry was applied to obtain high-quality EXAFS data for solutions with low concentrations of ions.

Annealing-Induced Structural Behavior of Mn Dopant Ions in Calcium Orthovanadate Ca(VO) Single Crystals.

The crystal and local structures of Czochralski-grown calcium orthovanadate (Ca(VO)) single crystals doped with over-stoichiometric 0.05 wt % MnO (CVO:0.05Mn) and annealed under different conditions are studied by single-crystal conventional and synchrotron X-ray diffraction, X-ray absorption spectroscopy, and electron paramagnetic resonance for the first time.

Revealing the peculiar local behavior of manganese and cobalt in diffusion-doped calcium orthovanadate Ca(VO).

Laser Ca(VO) single crystals (СVO; space group 3, = 21) with crystallochemical formula Ca1Ca2Ca3Ca4(Ca5 + Са5А)(V1V2V3)O grown by the Czochralski method were doped with МnO (CVO:МnO) and СoO (CVO:CoO) by high-temperature diffusion annealing. Statistical and local structures were comprehensively studied by single-crystal and powder synchrotron X-ray diffraction and conventional single-crystal X-ray diffraction as well as by X-ray absorption spectroscopy for the first time. The presence of Mn ions with a mixed formal charge and Co ions in the Ca2 (monocapped trigonal prism), Ca3 (two-capped trigonal prism), and Ca4 (octahedron) sites was revealed by diffraction methods.

Impact of composition and structural parameters on the catalytic activity of MFI type titanosilicalites.

Titanosilicalite of the MFI type was obtained a hydrothermal method. Its initial and annealed at 75 °C (TS-1P(75)) and 500 °C (TS-1P(500)) forms were studied by X-ray powder diffraction (PXRD), X-ray absorption spectroscopy (XAS-method), Fourier-transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), temperature-programmed ammonia desorption (TPD NH), and pyridine adsorption (Py). The full-profile Rietveld method allowed us to observe the presence of the organic template tetrapropylammonium hydroxide (TPAOH) in the framework voids, as well as to determine the silicate module (Si/Ti = 73.

Peculiar Structural Effects in Pure and Doped Functional Single Crystals of Complex Compositions.

Results of a detailed structural characterization of nominally pure and doped single crystals of scheelite, eulytin, and perovskite families obtained by melt methods were considered and analyzed. The influence of growth and post-growth annealing conditions on actual compositions of crystals is shown. The reasons for the coloration of the crystals are explained.