Analysis of data on zero and negative thermal expansion coefficients of materials

Many specific features and anomalies of the properties of water at low temperatures and negative pressures or hydrogen and nitrogen at megabar pressures and high temperatures are related to zero and negative coefficients of thermal expansion. A review of numerous examples of manifestation of these features for various materials in different states is presented. A set of data and methods for the analysis of negative thermal expansion coefficients is singled out for an independent line of research.