Standard enthalpies of formation of Sr2CuO3 and Ca2CuO3

The enthalpies of reactions between alkaline--earth cuprates M2CuO3 (M=Ca, Sr) and hydrochloric acid were measured in a hermetic swinging calorimeter at 298*15K. The M2CuO3 samples were prepared by solid--phase synthesis from calcium or strontium carbonate and copper oxide and characterized by X--ra...

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Bibliographic Details
Published in:Thermochimica acta 2005-06, Vol.430 (1-2), p.83-86
Main Authors: Monayenkova, A.S., Popova, A.A., Tiphlova, L.A., Gorushkina, Y.V., Tsoi, A.V., Romanova, I.P., Alyoshin, V.A.
Format: Article
Language:English
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Summary:The enthalpies of reactions between alkaline--earth cuprates M2CuO3 (M=Ca, Sr) and hydrochloric acid were measured in a hermetic swinging calorimeter at 298*15K. The M2CuO3 samples were prepared by solid--phase synthesis from calcium or strontium carbonate and copper oxide and characterized by X--ray powder diffraction, EDX and wet analysis. The standard enthalpies of formation obtained for the cuprates, --1431+ /--4kJmol(--1)for Ca2CuO3 and --1374+/--3kJmol(--1)for Sr2CuO3, are discussed and compared with previous experimental and assessed values.
ISSN:0040-6031
DOI:10.1016/j.tca.2004.12.017