The cerium-oxygen-carbon system

N. J. Clark; I. J. McColm

doi:10.1016/0022-1902(72)80368-3

The cerium-oxygen-carbon system

N. J. Clark
, I. J. McColm

Flinders University

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

For the CeOC system it is established by X-ray analyses and hydrolytic studies that no discrete cerium oxide-carbides exist in argon arc melted preparations. At lower temperatures the existence of a series of oxide-carbides of cerium based on isomorphous replacement of oxide ions by C₂ ^2- ions in the reduced cerium oxides is established. One hexagonal oxide-carbide pf composition CeO_1.48(C₂)_0.07 has been isolated from the products of the cerium metal plus carbon monoxide reaction at 1300-1600° and is described. A discrete orthorhombic oxide-carbide phase Ce₄O₂C₂ has also been isolated from the Ce + CO reaction which cannot be described on an isomorphous oxide ion replacement model. It is established by hydrolysis that neither of these phases contains C₁ units in its structure.

Original language	English
Pages (from-to)	117-120,IN1,121-123
Journal	Journal of Inorganic and Nuclear Chemistry
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/0022-1902(72)80368-3
Publication status	Published - Jan 1972

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AB - For the CeOC system it is established by X-ray analyses and hydrolytic studies that no discrete cerium oxide-carbides exist in argon arc melted preparations. At lower temperatures the existence of a series of oxide-carbides of cerium based on isomorphous replacement of oxide ions by C2 2- ions in the reduced cerium oxides is established. One hexagonal oxide-carbide pf composition CeO1.48(C2)0.07 has been isolated from the products of the cerium metal plus carbon monoxide reaction at 1300-1600° and is described. A discrete orthorhombic oxide-carbide phase Ce4O2C2 has also been isolated from the Ce + CO reaction which cannot be described on an isomorphous oxide ion replacement model. It is established by hydrolysis that neither of these phases contains C1 units in its structure.

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The cerium-oxygen-carbon system

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