Liquid-Liquid Phase Transition and Its Phase Diagram in Deeply-Cooled Heavy Water Confined in Nanoporous Silica Matrix

Published

May 13, 2015

Author(s)

Zhe Wang, Kanae Ito, Juscelino Leao, Leland Harriger, Yun Liu, Sow-Hsin Chen

Abstract

Using neutron diffraction technique we measure the average density of the heavy water confined in a nanoporous silica matrix, MCMR-41, over the pressure-temperature plane. The result suggest the existence of a line of liquid-liquid phase transition with its end point at 1.3 +- 0.3 kbar and 213 +- 3 K. This point is the liquid-liquid critical point (LLCP) according to the "liquid-liquid critical point" scenario. The phase diagram of the deeply cooled confined heavy water is discussed.

Citation

Physical Review Letters

Volume

6

Issue

11

Pub Type

Journals

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Keywords

neutron diffraction, liquid-liquid critical point, confined water phase diagram, high density liquid phase transition

Citation

Wang, Z. , Ito, K. , Leao, J. , Harriger, L. , Liu, Y. and Chen, S. (2015), Liquid-Liquid Phase Transition and Its Phase Diagram in Deeply-Cooled Heavy Water Confined in Nanoporous Silica Matrix, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917922 (Accessed October 20, 2025)