Chapter 1. Introduction.- Chapter 2. Review on Hetero-phase Structural Fluctuation of Semiconductor Melts.- Chapter 3. Phase Diagrams and Associated Solution Model for Liquid Phase of HgTe-based Ternary Systems.- Chapter 4. Density Measurements and Results.- Chapter 5. Density Measurements and Results.- Chapter 6. Viscosity and Electrical Conductivity Measurements and Results.- Chapter 7. Physics and Chemistry of Te and HgTe-based Ternary Melts.- Chapter 8. Physics and Chemistry of Te and HgTe-based Ternary Melts.- Chapter 9. Physics and Chemistry of Te and HgTe-based Ternary Melts.- Chapter10. Physics and Chemistry of Te and HgTe-based Ternary Melts.