Octahedral sites
Crystal structure of spinel type Li0 64Fe2 15Ge0 21O4
... In order to quantify the valence state of iron in the title compound, a 57 Fe Mo¨ssbauer spectrum was recorded at 340 K. It shows a broad, slightly asymmetric, doublet, which can be evaluated with two Lorentzian-shaped ...
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Yb3+ doping effects on thermal conductivity and thermal expansion of Yttrium aluminium garnet
... or octahedral sites, except for ceramic B2, in which some Yb 3+ ions may occupy different sites or interstitial ...on octahedral sites can efficiently reduce thermal conductivity and ...
23
Synthesis, Structural and Dielectric Studies of Nickel Substituted Cobalt Zinc Ferrite
... octahedral sites is thermally activated this electron hop- ping causes local displacement in the direction of the external applied field and as a result the dielectric po- larization ...
6
HYDROGEN TRAPPING IN NIOBIUM VANADIUM ALLOYS
... As one cools the sample for the first time to 10 K one observes that hydrogen is trapped at octahedral sites associated with two substitutional vanadium atoms..[r] ...
8
Mineralogy, Geochemistry and Raman Spectroscopy of Multi-Genesis Serpentine Polymorphs of Darepahn Ophiolites
... cations occupying the octahedral sites in the antigorite structure. Antigorites have some recrystallized textures such as deformed fibers and massive cluttered fine grain texture with[r] ...
19
Li2GeMo3O8: a novel reduced molybdenum oxide containing Mo3O13 cluster units
... and octahedral sites in the ratio 2:1. The Mo atoms occupy octahedral sites and form strongly bonded triangular cluster units involving three MoO 6 octahedra that are ...
8
Synthesis and Study of Microcrystalline Parameters with Electrical Conductivity of Al Doped Lithium Ferrites
... Magnetoplumite type of lithium ferrites substituted by aluminium ions having general chemical formula Li 0.5 Fe 0.5+x Al 12-X O 19 (where x = 1 to 6) were prepared by standard solid state reaction method The compounds ...
5
The Effects of Cu and Zn Dopants on Phase Constituents, Magnetic Properties and Microstructure of Nickel Ferrite
... or octahedral sites the structural, the electrical and magnetic properties of the base material would be changed [7, 14 and ...tetrahedral sites are occupied with Zn 2+ and Fe 3+ ion and the ...
7
23Na and 13C NMR investigation of Na2C60 and Na6C60 fullerides
... and second the small ionic radius permits intercalation of clusters of up to 8–9 Na ions into the octahedral sites, yielding compounds with x up to 11. 3 X-ray analysis indicates that Na fullerides ...
6
Dipotassium hexakis({2,2′ [ethane 1,2 diylbis(nitrilomethylidyne)]diphenolato}nickel(II)) tetracyanonickelate(II) methanol hexasolvate dihydrate
... The K+ cations occupy distorted octahedral sites surrounded by O atoms of the nickelII±Schiff base units, and the centrosymmetric [NiCN4]2ÿ anions participate in a twodimensional hydroge[r] ...
18
Review on the application of modified iron oxides as heterogeneous catalysts in Fenton reaction
... tetrahedral sites and Fe 2 þ cations are placed only in octahedral ...of octahedral sites in its structure that are mostly at the surface of the crystal and the catalytic activity is chie fl y ...
12
Wet chemical synthesis of magnesium zinc ferrite nanoparticles
... prefer octahedral sites, as it is known that the Mg-ferrite in nanoparticles form is a spinel with certain degree of inversion and shows magnetic behavior due to its incomplete inverse spinel structure at ...
6
Bi substitution induced magnetic moment distribution in spinel BixCo2 xMnO4 multiferroic
... samples conf rm the greater occupation of substituted cations in the octahedral sites. A lowered negative molecular f eld is depicted by the decrease in Curie–Weiss constant, which indicates the increased ...
6
REVIEW ON THE EFFECT OF SUBSTITUTION IN BASIC LITHIUM FERRITES
... the octahedral sites by the sixteen trivalent metal ions, in inverse ferrite eight out of the sixteen trivalent metal ions occupy tetrahedral sites, and the octahedral sites are ...
5
Type-Itemized Enumeration of RS-Stereoisomers of Octahedral Complexes
... A BSTRACT Stereoisograms of octahedral complexes are classified into five types (type I– type V) under the action of the corresponding RS-stereoisomeric group. Their enumeration is accomplished in a type-itemized ...
41
Synthesis and characterisation of metal substituted microporous materials
... The edge region o f the XAS spectra (XANES) provides information on the coordination geometry and on the oxidation state. The pre-edge peak (see Figure 2.2.2 (i)) arises from electrons being excited from one energy level ...
195
Octahedral tilting in the polar hexagonal tungsten bronzes RbNbW2O9 and KNbW2O9
... feature significant, perhaps unrealistic, distortions of the octahedra arising from uncertainty in the oxygen atom posi- tions, with uncertainties as high as 0.09 A ˚ for B—O bond lengths. We now report a detailed study ...
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One pot template synthesis, characterization and biological assay of tetraaza (N4) macrocyclic complexes of transition metal ions derived from acetylacetone / succinic acid with o phenylenediamine
... where M(II)=Co(II), Ni(II), Cu(II) and Zn(II), were synthesized by the reaction of acetylacetone / succinic acid and o-phenylenediamine in presence of metal salts by adopting template method. The synthesized macrocyclic ...
5
Synthetic and Structural Studies of Some Bivalent Transition Metal Complexes with Oxygen and Nitrogen Containing Schiff Base
... The present studies show that the ligand AEQS behaves as neutral tridentate chelating ligand and coordination proposes through amine nitrogen, imine nitrogen and Carbonyl oxygen atom of semicarbozone moiety. Thus on the ...
5
Studies of Distorted Octahedral Complexes of Cobalt, Nickel and Copper and Their Antibacterial Properties
... distorted octahedral geometry of Co(II) ...distorted octahedral geometry of the ...in octahedral symmetry of Cu(II) ...the octahedral symmetry have also been ...
8