What are the inferred pressure and temperature at the boundary of earth's stiffer mantle and outer core?

Planet earth is made up of three layers, namely: Earth's crust, mantle and core. The crust has a rocky structure and is the most superficial layer of the earth. The mantle is after the crust and is formed by solid components (magnesium and iron silicates). And the core is the deepest layer of the earth, can be divided into outer core and inner core. The core is composed of sulfur, silicon, oxygen, potassium and hydrogen, as well as metallic iron. Between the outer core and the mantle the temperature is 3,700 ° C.

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