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Showing papers in "Journal of Alloys and Compounds in 1994"


Journal ArticleDOI
TL;DR: In this paper, a luminescence study of Cm(III) has shown a linear correlation between the decay constant kobs (the reciprocal of the excited-state lifetime) and the number of water molecules nH2o in the first coordination sphere of complexes.

260 citations


Journal ArticleDOI
TL;DR: The lattice parameter of titanium nitride is also a linear function of the nitrogen/metal ratio in the temperature range investigated in this article, where the lattice parameters were obtained from high-temperature X-ray diffraction (HTXRD) measurements made with high-dimensional (X-ray) in the range of 298-1473 K.

159 citations


Journal ArticleDOI
TL;DR: The crystal structure of Co4Al13 has been investigated using metallography, X-ray single crystal and powder diffraction methods as mentioned in this paper, and the final value of the reliability factor is 0.0618 for 839 symmetry-independent reflections ( &|;F&|; > 4σ(F) ) with isotropic extinction and anisotropic thermal displacement coefficients.

130 citations


Journal ArticleDOI
TL;DR: In this paper, the X-ray properties of the cyanamides MgCN2, SrCN2 and BaCN2 were determined from single-crystal data and correlated with vibrational spectroscopic data.

127 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of both the non-stoichiometric composition and the chemical composition (Ni-to-Cu ratio) on the crystallographic and electrochemical properties have been investigated.

117 citations


Journal ArticleDOI
Yunyi Yang1, Menglian Gong1, Yuzhen Li1, Hanqi Lei1, Shuxiang Wu1 
TL;DR: In this article, the suitability of the energy gap between the excited triplet energy level of the ligands and the lowest excited energy level is a critical factor for sensitized luminescence of the central Ln3+ and the existence of a suitable conjugated system and ideal coordinating groups should be considered for ligand design.

117 citations


Journal ArticleDOI
TL;DR: Based on a deeper mathematical treatment of the process taking place in a planetary ball mill and experimental results concerning the ball-milled end product of the Ni 10 Zr 7 compound, Wang et al. as discussed by the authors proved that neither the shock frequency nor the shock energy separately governs the ball milled end products as assumed previously.

115 citations


Journal ArticleDOI
TL;DR: In this article, a comparison of the 4-f lanthanide ion (Ln3+) energy level structures in a variety of cubic elpasolite crystals is made.

115 citations


Journal ArticleDOI
TL;DR: In this paper, the LuNi2B2C-type structure has been investigated for different lanthanide atoms and transition metal elements and a linear regression fit was used to infer the positional parameter of the boron atom for the whole rare earth series.

99 citations


Journal ArticleDOI
TL;DR: In this paper, the equilibrium phase relationship in the NbTi-Zr system is computed using the Calphad approach using SGTE-recommended lattice stability expressions for the pure elements.

99 citations


Journal ArticleDOI
TL;DR: In this article, the magnetic properties of ThCr 2 Si 2 -type structure LaMn 2 Ge 2 (XSi, Ge) compounds have been reinvestigated by neutron diffraction experiments.

Journal ArticleDOI
TL;DR: In this article, the relationship between the local magnetic moments and crystal sites, mainly in iron-rich intermetallics, was analyzed in terms of numbers of neighbors, disclination lines and atomic domains.

Journal ArticleDOI
TL;DR: In this paper, it was shown that Nd 3+ and Ce 3+ can substitute for about 65% of the Ca in monoclinic zirconolite, using AI as a charge compensator in a Ti site.

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the influence of hydrogen gas absorption-desorption on the crystallographic lattice expansion of ternary non-stoichiometric compounds by means of in situ X-ray powder diffractometry.

Journal ArticleDOI
TL;DR: In this article, the microstructures of rare earth alloys with low Zn and high rare earth contents have been studied and the structure of the X phase is found to have an 18R modulated structure with a period of 0.26 nm.

Journal ArticleDOI
TL;DR: In this article, the RETSb 2 compounds were found to order antiferromagnetically below T � 20 K. Magnetic susceptibilities were generally measured in the temperature range from 4 to 100 K.

Journal ArticleDOI
TL;DR: In this article, the properties of the Al-C liquid phase have been evaluated from experimental information on the carbon solubility in liquid Al. The stability of Al4C3 was examined through thermodynamic calculations under various conditions.

Journal ArticleDOI
TL;DR: The luminescence of solid samples of europium mixed complexes with β-diketonates and o -phenanthroline (Phen), EuL 3 Phen, is investigated at 77 K in order to probe the structure of these compounds.

Journal ArticleDOI
Jun Lin1, Qiang Su1
TL;DR: Energy transfer phenomena have been observed by activating the oxyapatite host-lattice Ca2Gd8(SiO4)6O2 with Eu3+, Tb3+, Dy3+, Sm3+ as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this paper, the metal atom ordering and oxygen occupancy of four compounds of the filled-Ti2Ni type structure have been determined by single-crystal X-ray diffraction studies.

Journal ArticleDOI
TL;DR: In this article, the authors generalized the ordinary relaxation phenomenon exhibiting a pure exponential decay by replacing the first time derivative by the α-fractional derivative (0 α ⩽ 1) in the basic equation.


Journal ArticleDOI
TL;DR: In this article, the FT-Raman analysis of boron carbide with chemical compositions between B 4.3 C at the carbon-rich limit of the homogeneity range and B 10.37 C not far from the boronsrich limit yielding highly resolved and reliable spectra.

Journal ArticleDOI
TL;DR: In this article, a new composite hydrogen storage material with high storage capacity and favorable absorption-desorption kinetics has been successfully synthesized for Mg-40% FeTi composite alloys.

Journal ArticleDOI
TL;DR: Based on X-ray diffraction investigations, the nanocrystalline MoSiz phase formation induced by mechanically activated annealing is reported in this paper, where the effective parameters of such a new powder processing method combining short duration mechanical alloying and low temperature isothermal annaling are investigated.

Journal ArticleDOI
TL;DR: In this paper, the influence of the pretreatments of the metal hydride powder Zr(V0.25Ni0.75)2 with KOH and fluoride-containing solutions on the surface composition of the alloy grains by means of X-ray photoelectron spectroscopy was investigated.

Journal ArticleDOI
TL;DR: In this article, a hydrogen-absorbing alloy with a composition of LaNi 4.55 Al 0.45 through annealing and rapid quenching was investigated to improve its equilibrium characteristics with hydrogen.

Journal ArticleDOI
TL;DR: In this paper, samples of composition MOMO 2  Nb 2 O 5 (M 2+ ) Be, Mg, Ca, Mn, Co, Ni, Zn, Cd; M 4+ ǫ, Ti, Zr, Ge, Sn) have been prepared by annealing pressed powders at temperatures between 1073 and 1673 K and were investigated by the X-ray method.

Journal ArticleDOI
TL;DR: In this article, the oxidation behavior of sintered ZrC powder was studied under iso-and non-isothermal heating conditions under varied oxygen pressures from 5 to 50 kPa and the weight changes during the reaction were followed by thermogravimetry.

Journal ArticleDOI
TL;DR: In this article, the mechanism of microbial transformations of the radionuclides and toxic metals commonly found in energy wastes are summarized, and two processes for treating such wastes are described.