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  1. 2 Acta Physica Polonica A

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  1. 1 2011

  2. 1 2009

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  1. 2 Liu Q.

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Pressure-Interatomic Separation-Temperature Relationship of Alkali Halides

100%
Liu Q.
Acta Physica Polonica A
|
2011
|
vol. 119
|
issue 6
829-834
EN
A new method for the determination of pressure-interatomic separation-temperature relationship is investigated and applied for some alkali halides. The method is developed by using the Mie-Gruneisen equation of state and the Anderson thermal pressure and an ionic model based on Harrison's treatment of overlap repulsive potential which takes into account the interactions up to second neighbors. It is found that the new method yields satisfactory results in agreement with the available experimental data.
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Pressure Dependence of Interatomic Separation and Thermal Expansivity for Alkali Halides and Periclase (MgO)

80%
Liu Q.
Acta Physica Polonica A
|
2009
|
vol. 115
|
issue 3
709-712
EN
In this paper, a new isothermal equation of state is developed based on an approximation for the volume dependence of the Anderson-Grüneisen parameter δ_T along isotherm. The values of interatomic separation r with the change of pressure for nine alkali halides and periclase were investigated with the help of the new isotherm equation of state. The compression data are used to predict the pressure dependence of the coefficient of volume thermal expansion. The results are compared with the available experimental data and other theoretical results.
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