Modifications of structure and properties of liquids at high temperatures

We present results of the analysis of several structural models of metallic and nonmetallic liquids. Models cover the region of expanded liquid phase and supercritical fluid phase. The goal is to show that there are at least two regions on phase diagram, where liquid phase has essentially different atomic structure. Dense liquid and loose liquid have different atomic and electronic properties, as it could be seen from experiments. © Owned by the authors, published by EDP Sciences, 2011. Coherent Inc.;Crisel Instruments srl;Dipartimento di Fisica of the University of Roma "La Sapienza";ELETTRA Synchrotron Radiation Facility;ENEA;Sparx