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Article | REF: AF3571 V1

The action of pressure on solid molecular structures

Author: Jean-Pierre PETITET

Publication date: October 10, 2003

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1. Liquid-solid transition under pressure

1.1 Simon equation

The first step is to find out how the liquid-solid transition evolves under high pressure. With the exception of a few well-known substances (water, some salts, bismuth, antimony...), the melting temperature of a solid increases with pressure. The empirical relationship :

lg (P m + a) = b lg T m + c

with :

P m and T m
 : 
melting pressure and temperature
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