On which factor coefficient of cubical expansion depends?

I think the question when stated clearly is: What factors does the coefficient of volume expansions depends on? I think that is volume expansion because of the word cubic. In physics, some materials expand in length and in volume, when temperature changes occur. Each kind of material has their empirical values of coefficient of volume expansion in units of m³/°C. So, the obvious factor here is temperature. Generally, as the temperature increases, the volume expands because the molecules move more rapidly occupying more space. For gases, the factor of pressure is also important. But for incompressible objects like solids and liquids, it does not depend on pressure effects anymore.

2. they have negligible mass.