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Density of liquid tellurium under high pressure

1993; Elsevier BV; Volume: 156-158; Linguagem: Inglês

10.1016/0022-3093(93)90046-z

1873-4812

Yoshiaki Katayama, Kosuke Tsuji, J.-Q. Chen, Naoe Koyama, Takumi Kikegawa, Kenichi Yaoita, Osamu Shimomura,

High-pressure geophysics and materials

The densities of crystalline and liquid tellurium at 3 GPa and at 4 GPa were measured as functions of temperature. A new method for density measurements by X-ray absorption under high pressure and high temperature using synchroton radiation was employed. To overcome the distortion of the sample under pressure, a sapphire ball was put in the sample capsule as a calibrant of the thickness, and the intensity of the transmitted X-ray beam was measured as a function of sample position. The discontinuous variations of the density at the TeI-TeII and TeII-TeIII transitions and that upon melting were clearly observed. The change in density upon melting at 4 GPa was larger than that at 3 GPa. The result is consistent with the slope of the melting curve.