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The enthalpies of transition among the T x , T′, and T–La 2 CuO 4 phases are obtained from a combination of differential scanning calorimetry, high temperature oxide melt solution calorimetry, and transposed temperature drop calorimetry. The enthalpy of transformation of T x to T is 2.32±0.07kJ/mol and the corresponding entropy of transition is 4.38±0.13J/(molK). The...
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