Trace and minor elements like arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), antimony (Sb), thin (Sn), thallium (T1), vanadium (V) and zinc (Zn) are important in cement clinker manufacturing.Even in low concentrations these elements influence the production processes, the quality of the products and the environment.The environmental issues are the volatility of elements at high temperatures to the atmosphere and the leachability of elements from concrete products to the surroundings.If a prediction tool was available of the fate of elements to the gas phase and to the cement clinker phases several advantages could be achieved.Therefore a calculation tool is developed based on thermodynamic equilibrium calculatiors with a two-step method.Most of the thermodynamic data are taken from the FactSageTM database 6.4 and the solutions phases are adjusted for cement clinker and similar applications.