LAUSR

R.J.M. Konings and A. Plyasunov investigated the values of thermodynamic data determined by Szenknect et al. (2016) from solubility experiments performed using a synthetic sample of coffinite. Especially, they focused on the value of the standard molar entropy, which was derived from these solubility data and the calorimetric measurement of the standard molar enthalpy of formation of coffinite published by Guo et al. (2015) . The two independent measurements were performed on the same synthetic sample prepared by Mesbah et al. (2015) and fully characterized using complementary techniques by the two teams. We thank Konings and Plyasunov for their comment and the relevant analysis of previously published work. As they concluded, we agree that new experimental data are required to solve the “coffinite issue”. Here, we simply wish to clarify a few points regarding the questions arising from their analysis.