Standard Enthalpy of Formation of Lanthanum Zirconate

Mark Bolech; Erik H.E. Cordfunke; Frans J.J.G. Janssen; Alexandra Navrotsky

doi:10.1111/j.1151-2916.1995.tb08651.x

Standard Enthalpy of Formation of Lanthanum Zirconate

Mark Bolech, Erik H.E. Cordfunke, Frans J.J.G. Janssen, Alexandra Navrotsky

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

29 Scopus citations

Abstract

The enthalpy of formation of lanthanum zirconate, La₂Zr₂O₇, which is shown to have a distorted pyrochlore structure, was determined. High‐temperature solution calorimetry in molten lead borate was used to determine the heat of formation from the constituent oxides as −135.8 ± 6.4 kJ/mol at 974 K. Using additional data on the enthalpies of formation of the oxides and heat contents, this value was converted to a standard enthalpy of formation from the elements: Δ_fH°_298.15=−4130.4 ± 6.8 kJ/mol.

Original language	English (US)
Pages (from-to)	2257-2258
Number of pages	2
Journal	Journal of the American Ceramic Society
Volume	78
Issue number	8
DOIs	https://doi.org/10.1111/j.1151-2916.1995.tb08651.x
State	Published - Aug 1995
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1995.tb08651.x

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title = "Standard Enthalpy of Formation of Lanthanum Zirconate",

abstract = "The enthalpy of formation of lanthanum zirconate, La2Zr2O7, which is shown to have a distorted pyrochlore structure, was determined. High‐temperature solution calorimetry in molten lead borate was used to determine the heat of formation from the constituent oxides as −135.8 ± 6.4 kJ/mol at 974 K. Using additional data on the enthalpies of formation of the oxides and heat contents, this value was converted to a standard enthalpy of formation from the elements: ΔfH°298.15=−4130.4 ± 6.8 kJ/mol.",

author = "Mark Bolech and Cordfunke, {Erik H.E.} and Janssen, {Frans J.J.G.} and Alexandra Navrotsky",

year = "1995",

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AU - Bolech, Mark

AU - Cordfunke, Erik H.E.

AU - Janssen, Frans J.J.G.

AU - Navrotsky, Alexandra

PY - 1995/8

Y1 - 1995/8

N2 - The enthalpy of formation of lanthanum zirconate, La2Zr2O7, which is shown to have a distorted pyrochlore structure, was determined. High‐temperature solution calorimetry in molten lead borate was used to determine the heat of formation from the constituent oxides as −135.8 ± 6.4 kJ/mol at 974 K. Using additional data on the enthalpies of formation of the oxides and heat contents, this value was converted to a standard enthalpy of formation from the elements: ΔfH°298.15=−4130.4 ± 6.8 kJ/mol.

AB - The enthalpy of formation of lanthanum zirconate, La2Zr2O7, which is shown to have a distorted pyrochlore structure, was determined. High‐temperature solution calorimetry in molten lead borate was used to determine the heat of formation from the constituent oxides as −135.8 ± 6.4 kJ/mol at 974 K. Using additional data on the enthalpies of formation of the oxides and heat contents, this value was converted to a standard enthalpy of formation from the elements: ΔfH°298.15=−4130.4 ± 6.8 kJ/mol.

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JO - Journal of the American Ceramic Society

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Standard Enthalpy of Formation of Lanthanum Zirconate

Abstract

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