ChemInform Abstract: A New Mixed Oxide with (Bi12O14)n Columns: PbBi12Mo5O34.

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Preparation and characterization of Bi26-2xMn2xMo10O69-d and Bi26.4Mn0.6Mo10-2yMe2yO69-d (Me = V, Fe) Solid Solutions

“…The latter is reported to contain [Bi 12 O 14 ] ∞ columns oriented along the y-axis, MoO n polyhedrons and «isolated» Bi 3+ ions [4]. Bi 26 Mo 10 O 69 exhibits pure one-dimensional oxide ion transport along the columnar fragments (y axis) [5]. The values of ionic conductivity are close to that observed in the BIMEVOX and stabilized zirconia oxide ion conductors [6].…”

“…The values of ionic conductivity are close to that observed in the BIMEVOX and stabilized zirconia oxide ion conductors [6]. Hence Bi 26 Mo 10 O 69 -based materials are being considered as alternative electrolytic materials for gas conversion membranes, separators, sensors and fuel cells.…”

“…Bi 26 Mo 10 O 69 is part of a small solid solution range in the Bi 2 O 3 -MoO 3 system (2.57 ≤ Bi/Mo ≤ 2.77) [5]. A reversible monoclinic to triclinic phase transition is observed on cooling at c.a.…”

“…The structure of the triclinic form with one additional oxygen position was suggested in [7]. It includes MoO 5 [8]; Co [9]; V, P, W [6], while, larger cations can be substituted for bismuth including Pb [10]; Ln [11]; Ca, Sr, Ba [6] and Mn [12]. It was shown previously that the best conductivity properties of Bi 26-2x X-ray powder diffraction (XRPD).…”

“…The impedance spectroscopy method was used for electrochemical characterization of the ceramic samples of substituted Bi 26 Mo 10 O 69 in the range of 523-1123 K using Elinz-3000 impedance spectrometer. For the impedance measurements the samples were pelletized at 20 bar to yield pellets of 10 mm in diameter and ca.…”