caa a22 4500 463193385 CHVBK 20180406164915.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10973-006-7529-y doi (NATIONALLICENCE)springer-10.1007/s10973-006-7529-y Galwey Andrew Department of Chemistry, Rhodes University, 6140, Grahamstown, South Africa aut Meltingand thermal decompositions of solids [Elektronische Daten] Anappraisal of mechanistic interpretations of thermal processes in crystals [Andrew Galwey] This analysis of interface phenomena considers the alternative processes that may result from heating a crystal, particularly including thermal decomposition, involving chemical reactions, and melting, involving loss of long-range structural order. Such comparisons are expected to provide insights into the factors that determine and control the different types of thermal changes of solids. The survey also critically reviews some theoretical concepts that are currently used to describe solid-state thermal reactions and which provides relevant background information to models used in a recently proposed theory of melting. Probable reasons for the current lack of progress in characterizing the factors that control chemical changes and mechanisms of thermal reactions in solids are also discussed. It is concluded that some aspects of the macro properties of reaction interfaces in crystal reactions have been adequately described, including geometric representations of interface advance during nucleation and growth processes. In contrast, relatively very little is known about the detailed (micro) processes occurring within these active, advancing interfacial zones: reactant/product contacts during chemical reactions and crystal/melt contacts during fusion. From the patterns of behaviour distinguished, a correlation scheme, based on relative stabilities of crystal structures and components therein, is proposed, which accounts for the four principal types of thermal changes that occur on heating solids: sublimation, decomposition, crystallographic transformation or melting. Identifications of the reasons for these different consequences of heating are expected to contribute towards increasing our understanding of each of the individual processes mentioned and to advance theory of the thermal chemistry of solids, currently enjoying a prolonged quiescent phase. Springer-Verlag, 2006 crystolysis reactions nationallicence decompositions of solids nationallicence fusion nationallicence interface chemistry nationallicence melting nationallicence melting point nationallicence phase transformations nationallicence sublimation nationallicence Journal of Thermal Analysis and Calorimetry Springer Netherlands 87/2(2007-01-01), 601-615 1388-6150 87:2<601 2007 87 10973 https://doi.org/10.1007/s10973-006-7529-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7529-y text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Galwey Andrew Department of Chemistry, Rhodes University, 6140, Grahamstown, South Africa aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer Netherlands 87/2(2007-01-01), 601-615 1388-6150 87:2<601 2007 87 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer