Isothermal compressibility of supercooled water and evidence for a thermodynamic singularity at −45°C

摘要: Using a capillary technique for small samples, the isothermal compressibility κ T of water has been measured to −26°C. Accelerating increases at lower temperatures can be described by an expression form =Aeγ [where e= (T−T s )/T ], which is known describe anomalies encountered in vicinity thermodynamic singularity located . The implication that and certain other properties may decomposed into normal component anomalous diverges =−45°C supported analysis numerous relaxation data extend supercooled regime. characteristics are shown originate primarily sensitivity volume temperature changes, suggesting geometrical basis cooperative behavior. lambda transition associated with formation open hydrogen‐bonded network, but near coincidence experimental homogeneous nucleation suggests, as alternative, correspond limit mechanical stability liquid phase.