Phase Diagrams of Water Isotopologues and Noble Substances


  • L.A. Bulavin Taras Shevchenko National University of Kyiv, Department of Molecular Physics, Faculty of Physics
  • Ye.G. Rudnikov Taras Shevchenko National University of Kyiv, Department of Molecular Physics, Faculty of Physics, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Department of Biomedical Cybernetics, Faculty of Biomedical Engineering
  • S.O. Samoilenko Poltava State Medical University, Department of Physics



water isotopologues, superheavy water, noble substances, radon, chemical potential, phase diagrams, Kirchhoff equation, Massier functions, triple point


Phase diagrams calculated using the literature data for water isotopologues and noble substances have been presented. The principle of corresponding states when caloric variables are applied was verified. It was shown that in the reduced temperature, pressure, and chemical potential coordinates, the water isotopologues form a group of substances and have similar phase diagrams. On the other hand, inert substances, starting from argon, form another group with similar phase diagrams in the same coordinates. At the same time, helium and neon, for which the de Boer quantum parameter is substantial, have phase diagrams different from those for other noble substances. Phase diagrams of tritiated water, T2O, and radon, Rn, have been predicted.


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How to Cite

Bulavin, L., Rudnikov, Y., & Samoilenko, S. (2024). Phase Diagrams of Water Isotopologues and Noble Substances. Ukrainian Journal of Physics, 69(3), 179.



Physics of liquids and liquid systems, biophysics and medical physics

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