[1] High-pressure and high-temperature experiments of albitic plagioclase up to 41 GPa and 270°C were carried out using an externally heated diamond anvil cell. Raman spectroscopy and transmission electron microscopy of the recovered samples revealed that the amorphization of albite was complete at ∼37 GPa and room temperature. The amorphization pressure at 170°C was nearly the same as that at room temperature. In contrast, the pressure largely decreased to ∼31 GPa at 270°C. In comparison with the amorphization pressure of albite in laboratory shock experiments, that in the present static compression experiments is significantly lower (>10 GPa) even at room temperature. This suggests that shorter pressure duration results in a lower degree of amorphization of plagioclase. The formation of maskelynite in shocked meteorites does not necessarily require the very high shock pressure (30-90 GPa) that was previously estimated on the basis of shock recovery experiments. Citation: Tomioka, N., H. Kondo, A. Kunikata, and T. Nagai (2010), Pressure-induced amorphization of albitic plagioclase in an externally heated diamond anvil cell,