THE CR-CR2O3 OXYGEN BUFFER AND THE FREE ENERGY OF FORMATION OF CR2O3 FROM HIGH-TEMPERATURE ELECTROCHEMICAL MEASUREMENTS

dc.contributor.author	Holzheid A.
dc.contributor.author	O'Neill H.S.C.
dc.date.accessioned	2020-11-27T03:54:34Z
dc.date.available	2020-11-27T03:54:34Z
dc.date.issued	1995
dc.identifier	https://elibrary.ru/item.asp?id=661784
dc.identifier.citation	Geochimica et Cosmochimica Acta, 1995, , 3, 475-479
dc.identifier.issn	0016-7037
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/19699
dc.description.abstract	The free energy of formation of Cr2O3, defined by the reaction2 Cr + 32 O2 = Cr2O3, has been measured electrochemically using a yttria-doped thoria (YDT) solid electrolyte, in the temperature range from 900 to 1400 K. Fe + ''FeO'' was used as the reference electrode.The results have been combined with high temperature heat capacity data from the literature, to give, in J.mol-1μO2(+/- 170) = -758,585 + 349.718T - 25.5216T 1n T + 0.00935T2 (600 K < T < 1800 K) .Our results are not in good agreement with the calorimetric data and imply that the currently accepted calorimetric value for the entropy of Cr2O3 at 298.15 K may be too low by 4.6 J/K . mol.
dc.title	THE CR-CR2O3 OXYGEN BUFFER AND THE FREE ENERGY OF FORMATION OF CR2O3 FROM HIGH-TEMPERATURE ELECTROCHEMICAL MEASUREMENTS
dc.type	Статья

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