VOLUME CHANGES IN HGTE UPON MELTING AND HEATING

Data on volumetric changes of HgTe during melting and heating the melt were obtained by means of the gamma array attenuation technique. Nega tive volumetric effect has been established upon HgTe melting. The bar ic coefficient value of melting temperature dT/dP calculated by the Cl apeyron-Clausius equation is compared with the same value obtained on the (p-T) diagram of the Hg-Te system. The dependence density versus o n temperature for liquid HgTe increases from its melting point at 943 K to maximum value at 1023 K and than normal thermal expansion establi shed. These anomalous changes of density in liquid HgTe could be expla ined on the basis of the ''after-melting'' effect and fully described in terms of the ideal associated solution model assuming HgTe and Hg2T e3 associates.