Five rare earth complexeslanthanum(III),praseodymium(III),neodymium(III), samarium(III) and europium(III) have been synthesized from Schiff base ligand (N,N-bis (2-hydroxy-1-naphthylidene) acetylhydrazone). The complexes were characterized based on elemental analysis, molar conductance, ultraviolet, infrared, mass, thermogravimetric and powder X-ray diffraction studies. Infrared spectra sug...

The isotope effects of neodymium in Nd-glycolate ligand exchange system were studied by using ion exchange chromatography. The separation coefficients of neodymium isotopes, ε's, were calculated from the observed isotopic ratios at the front and rear boundaries of the neodymium adsorption band. The values of separation coefficients of neodymium isotopes, ε's, for the Nd-glycolate ligand exchang...

Small differences in the ratio of neodymium-142 to neodymium-144 in early formed mantle reservoirs in planetary bodies are the result of in situ decay of the extinct radionuclide samarium-146 and can be used to constrain early planetary differentiation and therefore the time scale of planetary accretion. The martian meteorite Nakhla (approximately 1.3 billion years old), the type sample of the ...

The microstructure of grain boundaries (GBs) in the commercial NdFeB-based alloy for permanent magnets has been studied. It is generally accepted that unique hard magnetic properties such alloys are controlled by thin layers a Nd-rich phase Nd2Fe14B/Nd2Fe14B GBs. These GB ensure isolation Nd2Fe14B grains from each other. usually supposed contain metallic Nd or intermetallic compounds. However, ...

ess was impracticable but it appeared to be possible to extract a small quantity of neodymium which was present in praseodymium. Accordingly, we selected a mixture which was composed of 94 per cent praseodymium and 6 per cent neodymium and extracted the latter with ether. The .residue contained such a small quantity of neodymium that it could not be detected by spectroscopic means and we believ...

The absorption spectra of the 4f electron transitions of neodymium, praseodymium, holmium and erbium complexes with fleroxacin in the presence of cetylpyridinium chloride were studied by normal and derivative spectrophotometry. Their molar absorptivity at the maximum absorption bands are about 5.3 (at 571 nm) times greater for neodymium, 2.8 (at 483 nm) times greater for praseodymium, 12.6 (at ...

We present in this study a new and one-step method allowing the preparation of an unprecedented family of stable half-lanthanidocenes. X Ray analysis shows that the isolated compounds all display the same ionic Ln-Mg bimetallic structure consisting of two anionic (Cp)Ln(BH4)3 species and one cationic Mg(THF)6 (Cp = C5Me5, Ln = Nd, 1a, Ln = La, 1b; Cp = C5H5, Ln = Nd, 2a; Cp = C5H2Ph3, Ln = Nd, ...

Mixed borohydride-chloride complexes of lanthanum and neodymium having the 2,5bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl ligand in the coordination sphere were synthesised by the reaction of potassium 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl [(DIP2-pyr)K] with a 1:1 mixture of [Ln(BH4)3(THF)3] and LnCl3 (Ln = La, Nd). Both compounds are dimeric in the solid state. The metal ...