Showing papers in "Materials Research Bulletin in 1982"

TL;DR: In this paper, NaxCrO2 and NaxNiO2 were obtained for the first time by electrochemical desintercalation from NaCrO 2 and NaNiO 2.

TL;DR: By exchange reaction from the sodium bronze Na 0, 70 CoO 2 (P2), a new layer variety of LiCoO 2(O2) has been obtained by sheet glidings as mentioned in this paper.

TL;DR: The ammonium chloride route to anhydrous rare-earth metal trichlorides, RECl3, is a two-step procedure consisting in, firstly, the (dry or wet) synthesis of a complex chloride, (NH4)3 RECl6 (t≈ 220°C) and, secondly, its decomposition either directly (small RE, t≈ 425°C).

TL;DR: The NZP structure is a candidate for immobilization of certain types of nuclear waste as discussed by the authors, and it will incorporate 137Cs, 90Sr, and a range of other nuclides.

TL;DR: In this paper, the lattice sites of foreign ions and compensating vacancies are established from phase diagrams of ternary oxides and a new compound was found, Ba La4 Ti4 O15 isomorphous with Ba5 Nb4 O 15.

TL;DR: In this article, the IR-spectra is studied and the TeO-stretching vibrations are assigned of α-TeO2 and 16 tellurites, built up by TeO3-, TeO4- or combinations of these polyhedra.

TL;DR: In this article, the Ni2+-ion octahedral site of La2NiO4 was refined to tetragonal symmetry, and a continuous increase in unit cell c/a ratio with temperature was observed.

TL;DR: In this article, the existence of an homologous series La n+1 Ni n O 3n−1, La 3 Ni 2 O 7, has been shown for the first time.

TL;DR: In this article, phase relations in the system Al2O3BaAl2O4 were established for the temperatures higher than 1600°C. Directional solidification experiments as well as vaporization loss measurements were carried out for construction of a correct phase diagram to the best of available knowledge.

TL;DR: In this paper, three distinct hydride phases can be formed at room temperature and modest H2 pressures, named β, γ, and δ hydrides respectively, and the thermodynamics of the β and γ phases are presented along with comments on the tendency for CaNi5 to disproportionate when hydrided.

TL;DR: The addition of fluoride dopants such as LiF, BiF 3, and PbF 2 rendered the glass workable, improved its viscosity-temperature characteristics, and allowed fluoride glass fibers to be drawn at extended lengths as mentioned in this paper.

TL;DR: In this paper, two new polymorphs of HSbO/sub 3/xH/sub 2/O have been synthesized and are also found to be good proton conductors.

TL;DR: The transformation from BTiO 2 to anatase either above 550°C under normal pressure or at room temperature under 60 kb is explained by a process of crystallographic shear with elimination of an equal number of anionic and cationic vacancies as discussed by the authors.

TL;DR: Proton conductivity measurements on poorly crystalline, electrically insulating hydrous oxides of Sb, Th, In, Cr, Al and Ga show a very wide range of values from 6 × 10 −8 ohm −1 cm −1 for A l (OH) 3 ·H 2 O to 7.5 × 10−3 ohm−1 cm−1 for Sb 2 O 5 ·5.4H 2O at 293K as discussed by the authors.

TL;DR: In this article, a cluster model of the glass transition was developed, treating the relative size of the cluster as an order parameter, which accounts for some of the features of the transition.

TL;DR: In this paper, the properties of a spinel copper cobaltite obtained by thermal decomposition of mixed nitrates of both metals at 350°C and normal pressure are described.

TL;DR: In this article, the authors performed full profile neutron powder diffraction structure refinements on electrolytically and chemically-prepared versions of the dimorphs of lead dioxide, the primary constituents in the charged positive plate of the lead/acid battery.

TL;DR: In this paper, solid solutions of the formula La2−xLnxCuO4 (Ln = Pr, Nd) possess the orthorhombic structure of La2NiO4 for small values of x and transform to the tetragonal Nd2NiF4 structure at a critical value of x.

TL;DR: In this article, the effects of aqueous corrosion on a fluorozirconate glass containing ZrF4, BaF2, AlF3, LaF3 and LiF were investigated using soaking solution analysis, infrared transmission and reflectance spectroscopy and scanning electron microscopy.

TL;DR: The isotypic compounds BaGa 2 S 4 and BaAl 2S 4 crystallize in the cubic system, space group Pa3 with the constants: BaGa2 S 4 : a = 1268.5±0.4 pm, BaAl S 4: a = 6 resp. 12.7 pm as mentioned in this paper.

TL;DR: In this paper, the short-range struture of vitreous GeS2 was investigated by infrared and Raman spectroscopy, and it was shown that the tetrahedral GeS4 tetrahedra of the GeS 2 are similar in structure to those in α-GeS2.

TL;DR: In this article, a dilatometer with an estimated resolution of ≅25 nm is described, which allows a continuous recording of the crystal expansion during electrointercalation of layered materials.

TL;DR: In this paper, it was shown that increasing the size of the octahedral site in K 2 NiF 4 − and perovskite-type oxides favours the high spin configuration of Ni (+III.

TL;DR: In this paper, a vehicle-mechanism for the transport of zeolites is proposed based on an optimized protonic conduction in a fully hydrated NH4-zeolite A.

TL;DR: In this article, the bandgaps of n-type CuWO4 and Cu3WO6 were determined as 2.06 and 1.85 eV, respectively, indicating that the valence band is a hybridized mixture of Cu-3d and 0-2p bands.

TL;DR: Ferrocyanide anion bearing hydrotalcite-like hydroxide was prepared by the precipitation with NaOH solution from the mixed solution of MgCl2, AlCl3 and K4Fe(CN)6 as discussed by the authors.

TL;DR: In this paper, the temperature dependence of electrical conductivities of dodecamolybdophophosphoric acid (MPA) and dodecatungstophosphric acid (WPA), and their mixed crystals (MWPA) are observed.

TL;DR: In this article, a new mixed hydride LiNa2AlH6 has been obtained and the X-ray structure has been determined on a Philips PW 1120 diffractometer and the product crystallises into a fcc structure.