The original F*A*C*T package was designed to simulate the thermochemistry of pyrometallurgical processing. It is used worldwide at approximately 400 installations in universities, governmental and non-governmental research laboratories and industry. Introduction FactSage ® was introduced in 2001 as the fusion of two well-known software packages in the field of computational thermochemistry: F*A*C*T / FACT-Win and ChemSage. In the article, emphasis is placed on the new databases and the calculation and manipulation of phase diagrams and complex phase equilibria. This paper presents a summary of the recent developments in the FactSage thermochemical software and databases. With the various modules one can perform a wide variety of thermochemical calculations and generate tables, graphs and figures of interest to chemical and physical metallurgists, chemical engineers, corrosion engineers, inorganic chemists, geochemists, ceramists, electrochemists, environmentalists, etc. The FactSage package runs on a PC operating under Microsoft Windows ® and consists of a series of information, database, calculation and manipulation modules that enable one to access and manipulate pure substances and solution databases. of Chemical Eng., École Polytechnique (Campus de Université de Montréal) Box 6079, Station Downtown, Montréal, Québec, CANADA H3C 3A7 ** GTT-Technologies, Kaiserstrasse 100, 52134 Herzogenrath, GERMANY (Submitted revised September 9, 2008) Abstract: FactSage ® was introduced in 2001 as the fusion of the F*A*C*T / FACT-Win and ChemSage thermochemical packages. Petersen** * CRCT - Center for Research in Computational Thermochemistry Dept. Calphad, In Press 2008 © 2008 Published by Elsevier Science Ltd FactSage Thermochemical Software and Databases – Recent Developments C.W.

Factsage equilibrium phase diagram