Enthalpy of transformation of a high-pressure polymorph of titanium dioxide to the rutile modification

Alexandra Navrotsky, John C. Jamieson, Ole J. Kleppa

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

The enthalpy of transformation of a high-pressure form of titanium dioxide, which has the alpha lead dioxide structure, to the rutile modification was measured by the method of "transposed temperature-drop calorimetry." For the reaction, titanium dioxide (alpha lead dioxide form) transforming to rutile, the change in the heat content is -0.76±0.17 kilocalorie per mole. From this value and the volume change (+2.8 percent) associated with the transformation, we estimate the equilibrium pressure at 294°K to be 60±20 kilobars.

Original languageEnglish (US)
Pages (from-to)388-389
Number of pages2
JournalScience
Volume158
Issue number3799
DOIs
StatePublished - 1967
Externally publishedYes

ASJC Scopus subject areas

  • General

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