scholarly journals Evidence for liquid water during the high-density to low-density amorphous ice transition

2009 ◽  
Vol 106 (12) ◽  
pp. 4596-4600 ◽  
Author(s):  
C. U. Kim ◽  
B. Barstow ◽  
M. W. Tate ◽  
S. M. Gruner
Keyword(s):  
Liquid Water ◽  
High Density ◽  
Low Density ◽  
Amorphous Ice

scholarly journals X-ray studies of the transformation from high- to low-density amorphous water

2019 ◽  
Vol 377 (2146) ◽  
pp. 20180164 ◽  
Author(s):  
Daniel Mariedahl ◽  
Fivos Perakis ◽  
Alexander Späh ◽  
Harshad Pathak ◽  
Kyung Hwan Kim ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Structural Evolution ◽  
High Energy ◽  
Real Space ◽  
High Density ◽  
Low Density ◽  
X Ray ◽  
Amorphous Ice ◽  
Density State ◽  
Amorphous States

Here we report about the structural evolution during the conversion from high-density amorphous ices at ambient pressure to the low-density state. Using high-energy X-ray diffraction, we have monitored the transformation by following in reciprocal space the structure factor S OO ( Q ) and derived in real space the pair distribution function g OO ( r ). Heating equilibrated high-density amorphous ice (eHDA) at a fast rate (4 K min –1 ), the transition to the low-density form occurs very rapidly, while domains of both high- and low-density coexist. On the other hand, the transition in the case of unannealed HDA (uHDA) and very-high-density amorphous ice is more complex and of continuous nature. The direct comparison of eHDA and uHDA indicates that the molecular structure of uHDA contains a larger amount of tetrahedral motives. The different crystallization behaviour of the derived low-density amorphous states is interpreted as emanating from increased tetrahedral coordination present in uHDA. This article is part of the theme issue ‘The physics and chemistry of ice: scaffolding across scales, from the viability of life to the formation of planets'.

Nature of the transformations of ice I and low‐density amorphous ice to high‐density amorphous ice

1989 ◽  
Vol 91 (11) ◽  
pp. 7187-7192 ◽  
Author(s):  
M. A. Floriano ◽  
Y. P. Handa ◽  
D. D. Klug ◽  
Edward Whalley
Keyword(s):  
High Density ◽  
Low Density ◽  
Amorphous Ice

Nature of the transformations of ice i and low-density amorphous ice to high-density amorphous ice

1990 ◽  
Vol 4 (1-6) ◽  
pp. 396-398 ◽  
Author(s):  
M. A. Floriano ◽  
Y. P. Handa ◽  
D. D. Klug ◽  
Edward Whalley
Keyword(s):  
High Density ◽  
Low Density ◽  
Amorphous Ice

Structure and Dynamics of Low-Density and High-Density Liquid Water at High Pressure

2013 ◽  
Vol 5 (1) ◽  
pp. 235-240 ◽  
Author(s):  
Samuele Fanetti ◽  
Andrea Lapini ◽  
Marco Pagliai ◽  
Margherita Citroni ◽  
Mariangela Di Donato ◽  
...  
Keyword(s):  
High Pressure ◽  
Liquid Water ◽  
High Density ◽  
Low Density ◽  
Structure And Dynamics

scholarly journals Evidence of low-density and high-density liquid phases and isochore end point for water confined to carbon nanotube

2017 ◽  
Vol 114 (16) ◽  
pp. 4066-4071 ◽  
Author(s):  
Kentaro Nomura ◽  
Toshihiro Kaneko ◽  
Jaeil Bai ◽  
Joseph S. Francisco ◽  
Kenji Yasuoka ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Liquid Water ◽  
Md Simulation ◽  
Ambient Pressure ◽  
Supercooled Liquid ◽  
High Density ◽  
Low Density ◽  
Melting Line ◽  
End Point ◽  
No Man's Land

Possible transition between two phases of supercooled liquid water, namely the low- and high-density liquid water, has been only predicted to occur below 230 K from molecular dynamics (MD) simulation. However, such a phase transition cannot be detected in the laboratory because of the so-called “no-man’s land” under deeply supercooled condition, where only crystalline ices have been observed. Here, we show MD simulation evidence that, inside an isolated carbon nanotube (CNT) with a diameter of 1.25 nm, both low- and high-density liquid water states can be detected near ambient temperature and above ambient pressure. In the temperature–pressure phase diagram, the low- and high-density liquid water phases are separated by the hexagonal ice nanotube (hINT) phase, and the melting line terminates at the isochore end point near 292 K because of the retracting melting line from 292 to 278 K. Beyond the isochore end point (292 K), low- and high-density liquid becomes indistinguishable. When the pressure is increased from 10 to 600 MPa along the 280-K isotherm, we observe that water inside the 1.25-nm-diameter CNT can undergo low-density liquid to hINT to high-density liquid reentrant first-order transitions.

High pressure-temperature Brillouin study of liquid water: Evidence of the structural transition from low-density water to high-density water

2005 ◽  
Vol 123 (17) ◽  
pp. 174511 ◽  
Author(s):  
Fangfei Li ◽  
Qiliang Cui ◽  
Zhi He ◽  
Tian Cui ◽  
Jian Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
Liquid Water ◽  
Structural Transition ◽  
High Density ◽  
Low Density
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