In our experimental laboratory, various devices are available to simulate magmatic processes in the Earth's crust and upper mantle. Externally heated autoclaves of the Tuttle type (Cold Seal Pressure Vessel, CSPV) are used for temperatures up to approx. 850 °C. Either Ar or H2O can be used as the pressure medium at a maximum pressure of up to 500 MPa, depending on the temperature. Depending on the pressure medium, the oxygen fugacity in water-saturated capsules is either in the range of the Ni-NiO (NNO) buffer (H2O), or approx. 2 orders of magnitude above NNO (Ar). The CSPVs are used, for example, to investigate hydrothermal and magmatic processes in the Earth's crust, or for the hydrothermal synthesis of minerals and glasses.<br/>Internally Heated Pressure Vessels (IHPV) are available for carrying out experiments at temperatures up to approx. 1250 °C. Ar or an Ar/H2 mixture is used as the pressure medium at maximum pressures of up to 500 MPa. By using an Ar/H2 mixture, the oxygen fugacity can be set between NNO-1 and NNO+2.3. Most systems are equipped with a ‘rapid-quench’ device in order to achieve cooling rates of approx. 150 °C/s. It is also possible to carry out depressurisation experiments in order to investigate volcanic degassing processes.<br/>Furthermore, our laboratory is equipped with several gas mixing furnaces and muffle furnaces for experiments, which can be used for the synthesis of minerals and glasses under atmospheric pressure conditions and controlled oxygen fugacity.<br/>