What are the inferred pressure temperature at the boundary of earth stiffer mantle and inner corr?

The boundary between the Earth's stiffer mantle and the inner core, known as the core-mantle boundary, is inferred to have pressures around 135 gigapascals (GPa) and temperatures estimated to be between 4,000 to 5,000 degrees Celsius. These extreme conditions arise from the immense weight of the overlying mantle and the heat generated by radioactive decay and residual heat from Earth's formation. The exact values can vary based on different geophysical models and assumptions about material properties.