Comment
Figure shows thermographs in the first and second heating processes. Sulfidation reaction starts above 360�Ž, and finishes at 690�Ž.(approximately by 90%)
The enthalpy of formation
�@Product is the trigonal ZrS2. Small impurity phase is ZrS3. The enthalpy of formation becomes ƒ¢Hf=96.3Kcal/mol.