Caesium in its purest state is a silvery white light metal, which appears golden yellow due to slightest contaminations.
|Melting point||28.5 °C|
|Boiling point||690 °C|
|Melting heat||15.8 kJ/kg|
|Specific thermal capacity at 20 °C||0.22 kJ/(kg·K)|
|Thermal conductivity||18 kJ/(m·K)|
|Therm. coefficient for linear expansion Coefficient for linear expansion||97·10-6/K|
As a general rule, reactions involving cesium are rather vigorous, for example, the element ignites upon contact with atmospheric oxygen and is capable of decomposing water. It ought to be preserved under oil. It is not applicable in the field of foundry technology.