Isotropic Raman line widths in binary mixtures of van der Waals liquids: A comparison between isotopically and chemically diluted states of liquid methyl iodide

1993 ◽  
Vol 99 (10) ◽  
pp. 7463-7476 ◽  
Author(s):  
Dietmar Keutel ◽  
Frank Seifert ◽  
Karl‐Ludwig Oehme
Keyword(s):  
Binary Mixtures ◽  
Raman Line ◽  
Methyl Iodide ◽  
Van Der Waals ◽  
Line Widths

Critical lines and phase equilibria in binary van der Waals mixtures

1980 ◽  
Vol 298 (1442) ◽  
pp. 495-540 ◽  
Keyword(s):  
Phase Equilibria ◽  
Binary Mixtures ◽  
Critical Points ◽  
Van Der Waals ◽  
Coexistence Curve ◽  
Phase Behaviour ◽  
Maximum Temperature ◽  
Phase System ◽  
Two Phase ◽  
Critical Solution Temperatures

The study of phase equilibria is historically one of the most important sources of information about the nature of intermolecular forces in non-electrolyte liquids and their mixtures. Many of the main features of vapour-liquid and liquid-liquid phase behaviour were already well characterized experimentally during the early part of this century, but the theoretical explanation of phase equilibria for a wide variety of substances and over a large range of pressures and temperatures has lagged far behind. This paper presents theoretical studies of phase equilibria in binary mixtures obeying the van der Waals equation, especially liquid-liquid equilibria that can occur at high pressures. The variety of fluid phase behaviour that occurs in binary mixtures can be qualitatively discussed in terms of the changes in thermodynamic properties near critical points. Upper critical solution temperatures (UCSTs) occur when a heterogeneous (two-phase) system becomes a homogeneous (one-phase) system when the temperature is raised. The maximum temperature along the temperature-mole fraction ( T, x ) coexistence curve for constant pressure is the UCST at this pressure. Lower critical solution temperatures (LCSTs) occur when a homogeneous system becomes a two-phase system when the temperature is increased. The LCST is at the minimum of the T, x coexistence curve. Thermodynamic considerations of critical points yield requirements for the curvature of the mixing functions plotted against x .

Correction of finite slit width effects on Raman line widths

1980 ◽  
Vol 36 (4) ◽  
pp. 341-344 ◽  
Author(s):  
Kazutoshi Tanabe ◽  
Jiro Hiraishi
Keyword(s):  
Raman Line ◽  
Slit Width ◽  
Line Widths

A New Approach to Explain Concentration-Dependent Changes of Isotropic Raman Line Width in the Associated Binary Mixtures

2006 ◽  
Vol 110 (32) ◽  
pp. 9849-9853 ◽  
Author(s):  
Animesh K. Ojha ◽  
Sunil K. Srivastava ◽  
Ranjan K. Singh ◽  
B. P. Asthana
Keyword(s):  
Binary Mixtures ◽  
Raman Line ◽  
Line Width ◽  
New Approach
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