Phase Diagram of Bismuth to 130 000 kg/cm2, 500°C

The phase diagram of Bi has been determined experimentally to 130 000 kg/${\mathrm{cm}}^2$ and 500°C. The observations of Bridgman, and others, to 30 000 kg/${\mathrm{cm}}^2$ and 270°C were generally verified. The new work indicates two new phases of solid Bi and several new triple points. The Bi VI→VIII transition at room temperature and about 125 000 kg/${\mathrm{cm}}^2$ involves a sharp decrease in electrical resistance which can serve as a pressure calibration point in future work.