Showing papers in "Journal of Solid State Chemistry in 1983"

TL;DR: In this article, profile refinement of powder neutron diffraction data has been used to examine the structure of γ-Fe 2 O 3 and to evaluate covalence effects for octahedral and tetrahedral Fe 3+ ions within the structure.

TL;DR: In this paper, the X-ray photo-electron spectra of NiMn2O4, NiZnO4 and Mn3O4 are reported, showing that the shift and broadening of the Mn-2p, Mn-3s, and Mn-4p lines in NiN 2O4 compared with those of the other compounds, are indicative of the change distribution Ni 2+ 1−ν Mn 2+ ν [Ni 2+

TL;DR: In this article, profile analysis of high-resolution, powder neutron-diffraction data was used to refine the previously reported structures of the ordered, distorted perovskites Ba2LaRuO6 and Ca2La RuO6.

TL;DR: In this article, the authors used linear correlations between calculated interaction parameters and a term representing the volume mismatch of the two end-members to predict the variation of critical temperature, and composition, as a function of component volume mismatch.

TL;DR: The crystal structure of stishovite, SiO/sub 2/, a=4.1773(1), c=2.6655(1) angstrom, with Z=2, has been refined with 217 graphite-monochromatized MoK..cap alpha.. data (2THETA max=120/sup 0/) to R=0.012 (R/sub w/= 0.014) as mentioned in this paper.

TL;DR: A series of zinc oxides Ln 2 BaZnO 5 has been synthesized for Ln = Sm, Eu, Gd, Dy, Ho, and Y.

TL;DR: In this article, high resolution electron microscopy and electron diffraction of several oxidized samples of the calcium lanthanum ferrites Ca x La 1− x FeO 3− y, with different values of x and y, prepared at high temperatures in air, shows the existence of a microdomain texture in which brownmillerite-type microdomains with a volume of ∼10 6 A 3 are intergrowth within a Ca 2 LaFe 3 O 8 substructure.

TL;DR: A complete vibrational study of various pyrochlore compounds A 2 B 2 O 7 shows the role of different chemical bonds in the structure and how the physico-chemical characteristics of the A and B cations influence these bonds and the rigidity of the two lattices of the structure as discussed by the authors.

TL;DR: In this paper, the structure of the FeIIIF6 octahedra is derived from single crystal X-ray diffraction data (605 independent reflections) and refined to R = 0.019 (Rω =0.021).

TL;DR: In this paper, a normal coordinate analysis of the [P 2 S 4−6 ] anion is carried out for the infrared and far-infrared spectra of the layered M PS 3 host systems.

TL;DR: In this article, single crystals of a new delafossite-type compound CuYO2 were grown from a Cu2OY2O3 melt by slow cooling from 1210°C.

TL;DR: In this article, a phase diagram with the phases Cu2−xTe (33.5-36.2 mole% Te), Cu3+xTe2 (40-41 mole%), and CuTe was constructed.

TL;DR: In this article, the properties of WO3−x crystals with andEa of the order 0.06 eV were studied by means of HREM and electrical conductivity measurements.

TL;DR: In this paper, a crystal structure determination is used to explain the strongly anisotropic resistivity of the purple bronze K0.9Mo6O17 is found to be trigonal with lattice parameters: a = 5.538 A and c = 13.656 A.

TL;DR: In this paper, the origin of the satellites which appear during the transformation is discussed from the point of view of structure factor and shape factor, and the role of the voids and the changes of their morphology are also discussed in comparison with other interpretations of the transformation sequences.

TL;DR: Ion exchange reactions for a range of mixed oxides, including the layered α-NaCrO 2 structure, the Rb 2 Ti 6 O 13 tunnel structure, and a spinel phase, were described in this paper.

TL;DR: In this paper, the magnetic susceptibility of the semiconducting lanthanide cuprates Nd 2 CuO 4, Pr 3+ and Sm 3+ has been measured in the range 4-300 K. The suceptibility of the Ln 3+ ions obeys the Curie-Weiss law at elevated temperatures but deviations from this law occur at lower temperatures.

TL;DR: In this article, the Re 2 Te 5 and Re 2 Se 2 Te 3 crystallizes in a new structure type, having space group Pbca (No. 61) with a = 13.003(5), b = 12.935(7), c = 14.212(5) A, Z = 12, 12.

TL;DR: In this paper, TEM and electron diffraction of the anion-deficient perovskite Ca2LaFe3O8 confirms the model previously proposed by J. C. Grenier et al.

TL;DR: In this paper, the point charge ionic model was used to estimate the Madelung energies of a series of isostructural phases on the basis of a simple point charge Ionic model.

TL;DR: In this paper, single crystals of Na 5 Zr(PO 4 ) 3 have been prepared using a flux method using a 3D network of PO 4 tetrahedra corner shared with ZrO 6 and NaO 6 octahedra.

TL;DR: In this paper, the transverse and longitudinal optical phonon frequencies at wave vector ∣ q ∣ ⋍ 0 are determined by Kramers-Kronig analysis and the classical oscillator-fit method.

TL;DR: In this paper, the spectral properties of cobalt-substituted magnetites (Fe3+)A(Co2+xFe2+1−xFe3+,BO2−4, pretreated in oxygen) were investigated as a function of temperature.

TL;DR: In this article, a neutron powder diffraction study of a dehydrated commercially available potassium exchanged zeolite A (Linde 3A) has shown that the diffraction pattern can be indexed in cubic space group Fm 3 c.

TL;DR: The crystallographic relation between phase I and phase II of barium hexaaluminates, which were conventionally considered as the single compound BaAl12O19, was investigated using principally the electron diffraction method as mentioned in this paper.

TL;DR: In this paper, a model for the electronic band structure, which consists of a large conduction band overlapping a narrow band that results from the strong hybridization between the p orbitals of the metalloid and some of the d orbitals, was proposed.

TL;DR: The lattice parameter of the diluted magnetic semiconductor Zn 1− x Mn x Te has been determined as a function of composition in this article, and the results show that for this range of composition the lattice parameters satisfy Vegard's law and are given by a ( x ) = (6.103 + 0.237 x ) A.

TL;DR: Fe 2 P 2 O 7 crystallizes in the C 1 space group with lattice parameters a = 6.649A, b = 8.484A, c = 4.488A, α = 90.04°, β = 103.89°, γ = 92.82°, and ϱ cal = 3.86 g/cc as discussed by the authors.

TL;DR: In this article, the emission spectra and lifetimes of erbium in fluorozirconate glass, in lead-gallium-zinc fluoride glass, and in yttrium-zirconium oxide crystal were measured and compared with the theoretical calculations.

TL;DR: In this article, the crystal structure of Li0.2ReO3 has been determined and that of Li 0.36WO3 redetermined by neutron diffraction powder profile analysis.