Enthalpies of Formation of LaMO3 Perovskites (M = Cr, Fe, Co, and Ni)

Abstract

Enthalpies of formation from constituent oxides and elements at 298 K were determined by high-temperature oxide melt solution calorimetry for a group of technologically important perovskites LaMO3 (M = Cr, Fe, Co, and Ni). the enthalpies of formation of LaCrO3 and LaFeO3 from oxides (La2O3 and Cr2O3 or Fe2O3) are -70.06 ± 2.79 kJ/mol and -64.58 ± 2.32 kJ/mol, respectively. the enthalpies of formation of LaCoO3 and LaNiO3 from oxides (La2O3 and CoO or NiO) and O2 are -107.64 ± 1.77 kJ/mol and -57.31 ± 2.55 kJ/mol, respectively. All these data are evaluated and found to be consistent with literature values obtained using other methods. the relative stability among these four perovskites decreases in the order of Cr, Fe, Co, Ni. © 2005 Materials Research Society.

Department(s)

Materials Science and Engineering

Comments

U.S. Department of Energy, Grant None

International Standard Serial Number (ISSN)

0884-2914

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Springer; Materials Research Society, All rights reserved.

Publication Date

01 Jan 2005

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