Abstract
Melting is considered using a model of the equation of state proposed for the nonrelativistic range. A critical point in the melting curve calculated for copper is found. Based on an approximate expression for the shear modulus, the pressure at the critical point is estimated for most elements. It is shown that this pressure falls into the range 1 Mbar-1 Gbar, being much lower for readily compressible elements, helium, and alkaline metals (for them, P ∼ 1 Mbar). The possibility of existence and finding of the critical point is discussed.
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Original Russian Text © V.V. Prut, 2008, published in Zhurnal Tekhnicheskoĭ Fiziki, 2008, Vol. 78, No. 5, pp. 138–141.