Showing papers in "Materials Research Bulletin in 1983"

TL;DR: In this article, Li has been inserted chemically and electrochemically into Mn3O4 and Li[Mn2]O4 at room temperature from X-ray diffraction.

TL;DR: In this article, a series of Ln 2 S 3 compounds of α, δ, e and τ structure types were measured by diffuse reflectance spectroscopy and the absorption edges were observed with band gaps ranging from 2.2 to 3.5 eV.

TL;DR: In this article, LiI-rich glasses obtained in the B2S3-Li2S-LiI system have been investigated and the Ionic conductivity is higher than 10−3Ω−1cm−1 at 25°C.

TL;DR: In this paper, LiMnO2λ, a new tetragonal phase, having the rocksalt structure, has been prepared at ambiant temperature by lithium intercalation with n-butyl lithium into Li 0.02 MnO2L or Li Mn2O4 by solid-liquid reaction with various oxidizing agents.

TL;DR: A pyrochlore with the composition Pb1.83Nb1 1.71Mg0.29O6.39 was fabricated and found to belong to the anion deficient structural family of pyroglores having space group Fd3m with a lattice parameter a = 10.5988 A.

TL;DR: In this article, a new interpretation for the assignment of certain transition metal ions to tetrahedral sites in the glass structure was proposed, based on Raman spectra and optical absorption spectra.

TL;DR: In this article, the intercalation of CnH2n+1N+(CH3)3 ions and trimethylammonium ions with n ranging from 1 to 18 was investigated in the lamellar structure of V2O5 gels.

TL;DR: The high-temperature structure of tetragonal LaNbO 4 has been determined by powder neutron diffraction methods as discussed by the authors, and the structure is isomorphous with scheelite (CaWO 4 ) and is unusual in that it contains Nb 5+ ions in an almost undistorted tetrahedral oxygen environment.

TL;DR: In this paper, a single crystal X-ray structure determination of NASICON at 495K was presented, where the crystal symmetry is rhombohedral at this temperature, but monoclinic at room temperature.

TL;DR: Cubic-zincblende-type boron nitride was synthesized from amorphous state at pressures higher than 6 GPa and at temperatures higher than 800°C, without any planned addition of catalysts as discussed by the authors.

TL;DR: The crystal structure of Cs-exchanged zeolite Rho (143m) has been solved using neutron powder data collected at 293K and 493K as mentioned in this paper, which differs from that proposed by Robson, Shoemaker, Ogilvie, and Manor (1973) for the hydrogen form.

TL;DR: The superconductivity and crystal structure of new transition metal arsenide compounds MM'As, where M = Zr or Hf and M' = Ru or Os, are reported in this article.

TL;DR: In this article, the structural evolution of α and β -Si 3 N 4 has been studied up to 900°C by means of the time of flight neutron diffraction method, and it has been shown that the relative evolution of lattice parameters is the same for both phases; the modifications versus temperature are isotropic along the cristallographic axas a and c.

TL;DR: In this paper, the authors used laser Raman spectroscopy to determine the chemical compounds of the oxides of binary iron-base alloys containing chromium additions of 3, 9, 12 and 18 %.

TL;DR: In this paper, the phase diagram of the PbF 2 -YF 3 system has been studied by DTA and X-ray diffraction techniques, and a large domain of a fluorite-type solid solution called F has been isolated.

TL;DR: In this article, the growth characteristics and the connectivity pattern of the crystallites of glass-ceramic composites can be predicted based on the piezoelectric, pyroelectric and dielectric properties of the composites.

TL;DR: In this article, Li 1− x M 2+ x 2 □ x 2 ) TaO 3 with M=Zn, Ni, Mg and Ca was found to be stable even at x=05, where 25% of the Li sites are vacant.

TL;DR: In this article, the existence of disordered intergrowths between Ca2Fe2O5 and (Ca23La13)FeO83 is confirmed by high resolution images.

TL;DR: In this paper, the thallium atoms in the lattice channels of the metallic conductor T1V5S8 were shown to be mobile at ambient temperature: on anodic oxidation nonstoichiometric phases TlxV5s8 are obtained with 1 ⩾ x ⊾ 1 3. 205T1 and 51V NMR data reveal a unique behaviour: the topotactic redox reaction proceeds via stoichiometry dependent changes in the oxidation state of the channel guest cations at constant matrix charge.

TL;DR: A chemical polymerization method which allows the formation of NASICON compounds having rhombohedral structure at room temperature is presented in this paper, which circumvents the potentially destructive monoclinic-rhombohedral phase transformation associated with these materials.

TL;DR: In this paper, the new compound K2SnTe5 crystallizes in the tetragonal system (space group: 14cm, Nr. 108) with a = 848.1(3) pm, c = 1536.9(7) pm and ca = 1.812, z = 4.

TL;DR: In this article, NiPS 3 and CdPS 3 were reacted with a variety of amines, of which only short-chain linear alkylamines gave stable intercalation products.

TL;DR: In this article, it was found that lithium may be rapidly inserted into the vanadium bronzes to yield phases of composition Li /SUB y/ Na/SUB x/ V/sub 2/O/sub 5/ and Li/Sub y/ K /Sub x/V/sub O/sub 6/5/ for values less than 2/3.

TL;DR: A new series of phosphate tungsten bronzes P4O8(WO3)2m has been investigated by X-ray and electron diffraction and electron microscopy as mentioned in this paper.

TL;DR: Barium hexaferrite films have been grown by liquid phase epitaxy on Zr and Mg substituted Strontium hexagallate substrates as mentioned in this paper, and continuous films of 20 mm diameter have been obtained.

TL;DR: In this article, the crystal structures of ternary silicides have been determined in the RE -Rh or Ir -Si systems and the crystal structure has been determined: RERh 3 Si 2, RE 2 Rh 3 Si 5, RE 2RhSi 3 (RE = Y, La, Gd → Er), REIrSi(RE = La, Ce, Nd), REERhSi 2 and REIr Si 2 (RE= La → Gd).

TL;DR: In this article, the basic V 2 O 5 ribbon structure is not modified upon intercalation, but noticeable improvement of the order along the ribbon packing direction is obtained, especially with Co(C 5 H 5 ) + 2.

TL;DR: In this article, the infrared study of water adsorbed on vanadium oxide xerogel (V2O5 1,6 H2O; V2O 5 0,5 H 2O) suggests two models for the structure of adsorbbed water molecules.