Density maxima in high-pressure supercooled water and liquid silicon dioxide

C. A. Angell, H. Kanno

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117 Scopus citations

Abstract

With glass capillary pressure vessels it has been possible to study the effect of pressure on the temperature of maximum density (TMD) and on the "sharpness" of the density maximum in liquid H2O and D 2O in the important but little-studied supercooled regime. A pressure of 1200 bars produces a 33°C depression of the TMD in these liquids and a considerable reduction in sharpness. Comparison with the ratherflat density maximum for liquid SiO2 supports the notion that the presence or absence of density anomalies in "tetrahedral" liquids depends on the average bridge-bond angle, which is evidently unusually large in water at normal pressure.

Original languageEnglish (US)
Pages (from-to)1121-1122
Number of pages2
JournalScience
Volume193
Issue number4258
DOIs
StatePublished - Jan 1 1976
Externally publishedYes

ASJC Scopus subject areas

  • General

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