Can the crystal particle expand?

[mazwan]

Homework Statement

With increasing the temperature, can the crystal particle expand? Actually, what really happen to the structure when increase the temperature? Why its look bigger size compare to actual size. Does it mean the crystal of particle expand? or something happen to the particle? Can you explain for me what actually happen?

Homework Equations

The Attempt at a Solution

 

[mfb]

What is a "crystal particle", what is its "actual size" (compared to what), and where does it look bigger?

Crystals (usually) expand a bit if they get hot. With increasing energy, the average distance between atoms increases, which can be seen at their potential function.

 

[mazwan]

what i know. the crystals didnt expand. The distance of atoms vibrate and away from each others when increasing the energy. that why the size look bigger. may i right sir? i also still confuse about that. i did an experiment about plasma sputtering now, and i am realize that the size of grain will be increase with increasing the temperature. i don't know the truth theories of the crystal growth?
Thank for explaining that sir.

 

[mfb]

For me, it is hard to understand your posts.

The distance of atoms vibrate and away from each others when increasing the energy. that why the size look bigger.

As I posted, most crystals increase their size a bit if the temperature increases. The difference is small - you do not see it, you need some measurement tools for that.

i don't know the truth theories of the crystal growth?

Crystal growth is something different.