SGTE DATA FOR PURE ELEMENTS
NPL Materials Centre,
Division of Industry and Innovation,
National Physical Laboratory,
Teddington, Middlesex, TW11 0LW, UK
Thermodynamic data for the condensed phases of 78 elements as currently used by SGTE (Scientific Group Thermodata Europe) are tabulated. SGTE is a consortium of twelve organisations, mainly in Western Europe, engaged in the compilation of a comprehensive, self-consistent and authoritative thermochemical database for inorganic and metallurgical systems. These data are a revision of an earlier publication (91din) which has been used throughout the world as the foundation for the critical assessment of thermodynamic data for binary, ternary and quaternary systems and ultimately of commercial databases for use in modelling materials properties and industrial processes. Since this publication it has been necessary to modify data for some phases of elements in the light of experience and recent experimental work and to extend the range of phases covered for a number of elements. This new publication supercedes this earlier publication.
The data for each phase of each element considered are presented as expressions showing, as a function of temperature, the variation of (a) G-HSER, the Gibbs energy relative to the enthalpy of the "Standard Element Reference" ie the reference phase for the element at 298.15 K and, where appropriate, 1 Pa, and (b) the difference in Gibbs energy between each phase and this reference phase (ie lattice stability). The variation of the heat capacity of the various phases and the Gibbs energy difference between phases are also shown graphically. For certain elements the thermodynamic data have been assessed as a function of pressure as well as temperature. Where appropriate a temperature - pressure phase diagram is also shown.