Physical Nature of The Density Maximum for Water at 4°C

A new approach to the physical nature of the water density maximum at 4°C is proposed. The main attention is focused on the role of H -bonds in the formation of the specific volume and thermal expansion coefficients for ordinary and heavy water. It is shown that the minimum of the specific volume for water is connected with the amplification of H -bonds ( D -bonds) role at approaching their triple points.