Measurement of the Resistance of Manganin under Liquid Pressure to 100 kbar and Its Application to the Measurement of the Transition Pressures of Bi and Sn

The electrical resistance of manganin wire and the X-ray diffraction of NaCl were measured simultaneously under hydrostatic pressures up to 100 kbar using a cubic-anvil type pressure apparatus at room temperature. The solidification pressures of 1: 1 pentane-isopentane and isopropanol were determined by taking advantage of the sensitivities of the resistance of manganin wire to the local stress. The transition pressures for BiIII↔V and SnI↔II were measured in both loading and unloading by detecting the pressure where the high-pressure phase and the low-pressure phase coexist.