Mössbauer Spectra of Tellurium under Pressures up to 8000 MPa

The Mossbauer spectrum of 125Te was studied to determine the crystal structure of Te up to pressures of 8000 MPa at 80 deg K. The effect of pressure on the spectrum is plotted for the pressure range studied. It is postulated that the structure of Te > 4000 MPa is distorted b.c.c. In analyzing the isomer shifts relative to beta -TeO3, a new electronic configuration was found in this structure, 5s1p5. The pressure dependence of the Mossbauer fraction for 125Te in Te was experimentally determined. This dependence agreed well with the compressibility data for Te in the Debye approximation and the experimentally determined phonon frequency distribution function g( omega ).7 refs.--F.E.G.