Trouble looking up values of critical temperature for mercury

In summary, the critical temperature of a material is the highest temperature at which it can exist as a liquid and is typically determined through experiments and measurements. Knowing the critical temperature of mercury is important for industrial and scientific purposes, and it can be affected by factors such as purity, impurities, and measurement methods. The critical temperature of mercury can also be altered by changes in pressure and container conditions, but this may also affect other properties of the material.
  • #1
slimjim
11
0
I find values for the critical temperature of mercury, but two values are given;

one for Hg (α) and one for Hg (β).


Does anyone know what the alpha and beta denotes?


Here is the page I am referring to (under section titled "Properties of superconducting elements"):

http://www.kayelaby.npl.co.uk/general_physics/2_6/2_6_4.html
 
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  • #2
Since this will be solid mercury, it could be two different crystalline forms, but I can't find any reference to back this up.
 

FAQ: Trouble looking up values of critical temperature for mercury

What is critical temperature?

Critical temperature is the temperature at which a material undergoes a phase transition, typically from a liquid to a gas. It is the highest temperature at which the material can exist as a liquid.

Why is it important to know the critical temperature of mercury?

The critical temperature of mercury is important to know for various industrial and scientific purposes, such as determining its behavior under different temperatures and pressures, as well as its potential use in thermometers and other equipment.

How is the critical temperature of mercury determined?

The critical temperature of mercury is typically determined through experiments and measurements, such as using a pressure-temperature phase diagram or by observing the physical properties of the material at different temperatures and pressures.

What factors can affect the critical temperature of mercury?

The critical temperature of mercury can be affected by factors such as the purity of the material, the presence of impurities or additives, and the method of measurement. It can also vary depending on the pressure and container used.

Can the critical temperature of mercury be changed?

The critical temperature of mercury is a constant value for a pure substance, but it can be altered by adding impurities or changing the pressure and container conditions. However, these changes may also affect other properties of the material.

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