Alkali metals like Li and Na are inserted into the tunnels of anion excess fluorite related structure compound Bi2Te2W3O16 using n-butyllithium and NaN3, respectively without any perceptible change of crystal structure. The insertion process is not completely reversible. The alkali metal inserted phases have room temperature resistivity values three orders less than that of the parent phase. The parent phase Bi2Te2W3O16 shows anomalous increase in dielectric constant with temperature.

Upadhyayula V Varadaraju

Department Of Chemistry

Karthikeyan N. Marimuthu

Crystal Structure

Electric conductivity of solids

FLUORSPAR

lithium

Permittivity

Raman spectroscopy

Sodium

Thermal effects

ALKALI METAL INSERTION

Bismuth compounds

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Alkali metal insertion and dielectric studies on anion excess fluorite related mixed oxide Bi2Te2W3O16

Materials Chemistry and Physics

The effect of substitution of 'Hg' at the Bi-site in Bi1.7V 8O16 on the phase formation and electrical properties has been studied. In Bi1.7-xHgxV8O16, single phase formation is achieved only for x ≤ 0.4 and all the phases crystallize in tetragonal structure. The dc electrical resistivity studies indicate that all the mercury substituted single phase compounds Bi 1.7-xHgxV8O16 are electrically semiconducting and the room temperature resistivity values increase with increasing mercury content. Alkali metals like lithium and sodium have been inserted successfully into the tunnels of Bi1.7V8O 16. The lithium intercalated phase Li2.7Bi 1.7V8O16 shows antiferromagnetic ordering, whereas the sodium intercalated phase NaBi1.7V8O 16 exhibits Pauli paramagnetic like behavior down to 4.5 K.

Solid state studies on Bi1.7-xHgxV8O 16 (x≤0.4) and magnetic properties of alkali metal inserted A xBi1.7V8O16 (A=Li and Na) hollandite type phases

Insertion of Li into the vacant sites (channels) of certain NZP phases (ATi2P3O12, A = Li, Na, and NbTiP 3O12) using BunLi at room temperature has been established; the preparation and preliminary structural and i.r. data of the phases are described.

Journal of the Chemical Society, Chemical Communications

Lithium insertion into phases with NZP structure

Journal of Solid State Chemistry

Structural and Local Environment Modifications in a Chemically Lithiated Iron Thiospinel

Structural and Nonlinear Optical Characterizations of Tellurium Oxide-Based Glasses: TeO2–BaO–TiO2

Solid State Ionics

Li intercalation studies on AFeMP3O12

Chemistry Letters

Superconductivity of Alkali Metal Intercalated Niobate with a Layered Perovskite Structure

Journal	Data powered by TypesetMaterials Chemistry and Physics
Publisher	Data powered by TypesetElsevier Sequoia SA, Lausanne
ISSN	02540584
Open Access	No