Common compression factor and bulk modulus quiescence points of liquid cesium

Abstract

In this paper, a recently developed analytical equation of state (EOS) is used to investigate the bulk modulus of compressed liquid cesium and to locate common compression factor and the bulk modulus quiescence point(s). This EOS is applied quick well to Na and Rb far from T c . Bulk modulus of liquid cesium have two quiescence points, a sharp one in the range K 1500 K 1100 − and a diffused one in the range. Therefore, two types of liquid cesium metal may be identified with characteristic structure and interaction potential energy. It is a constant independent of temperature, however, some residual change is seen due to the change in the values of integral of pair correlation function as temperature is increased. Furthermore, it is related to the shape of the unit cell and the atomic size at equilibrium. Observation of distinct liquid in the metal-nonmetal transition range is compared with NMR studies and molecular dynamic results.

Density-Dependent Equations of State for Metal, Nonmetal, and Transition States for Compressed Mercury Fluid

“…The method is outlined as follows while the details can be found elsewhere. 19,20,21 First, the total interaction potential energy of N-atom-liquid system ) r , , r , r ( U N 2 1…”

“…To derive the equation of state for mercury, we follow closely the pervious model for dense liquid cesium metal. The method is outlined as follows while the details can be found elsewhere. − First, the total interaction potential energy of an N atom-liquid system U ( r 1 , r 2 , ..., r N ) is approximated as the sum of pairwise interaction potential energy u ( r ij ) of the atom i with atom j located at distance r ij in the liquid state . The summation is restricted to the nearest neighboring atoms and thus U ( r 1 , r 2 , ..., r N ) = ( N /2) u ( r ), where r is the interatomic distance.…”

Structural properties of liquid cesium metal by application of cohesive energy density

“…), the long range attraction part has the effect of decreasing the height of first peak of the pair correlation function and conversely it has the effect of increasing the height at high temperature (e.g., , In our previous studies, the prediction of equilibrium thermodynamic properties of liquid cesium by applying accurate potential functions was presented [18][19][20]. In particular we have presented an equation of state and evaluated the equilibrium thermodynamic properties of the liquid state.…”

“…In our previous studies, the prediction of equilibrium thermodynamic properties of liquid cesium by applying accurate potential functions was presented [18][19][20]. In particular we have presented an equation of state and evaluated the equilibrium thermodynamic properties of the liquid state.…”