Baijun Yan, Jianhua Liu, Yunduo Dai, Qifeng Shu,  and Zhihua Ren, Molar heat capacities of La2Mo2O9 and La1.9Sr0.1MO2O9-δ, J. Univ. Sci. Technol. Beijing, 14(2007), No. 5, pp. 395-398. https://doi.org/10.1016/S1005-8850(07)60078-4
Cite this article as:
Baijun Yan, Jianhua Liu, Yunduo Dai, Qifeng Shu,  and Zhihua Ren, Molar heat capacities of La2Mo2O9 and La1.9Sr0.1MO2O9-δ, J. Univ. Sci. Technol. Beijing, 14(2007), No. 5, pp. 395-398. https://doi.org/10.1016/S1005-8850(07)60078-4
Metallurgy

Molar heat capacities of La2Mo2O9 and La1.9Sr0.1MO2O9-δ

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  • The molar heat capacities of La2Mo209 and La1.9Sr0.1MO209-δ were obtained using the differential scanning calorimetry (DSC) technique in a temperature range from 298 to 1473 K. The DSC curve of La2Mo209 showed an endothermal peak around 834 K corresponding to a first-order monoclinic-cubic phase transition, and the enthalpy change accompanying this phase transition is 5.99 kJ/mol. No evident endothermal peak existed in the DSC curve of La1.9Sr0.1MO209-δ, but a broad thermal anomaly existed in its heat capacity curve at around 832 K. In addition, the heat capacity values of La2Mo209 and La1.9Sr0.1MO209-δ began to decrease at 1196 and 1330 K, respectively. The non-transitional heat capacity values of La2Mo209 and La1.9Sr0.1MO209-δ were formulated using multiple regression analysis in two temperature ranges.
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