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Name: Unknown
Status: Student
Grade:  6-8
Location: OR
Country: USA
Date: May 2005


Question:
When a diamond melts, will it reform into a diamond when it cools? If not, what happens?



Replies:
If you were able to melt a diamond (this would have to be done in a container free of oxygen or the diamond would burn), when it cooled it would not be a diamond anymore. Note that the diamond is made of the element carbon. To be a diamond the carbon atoms have to be in a special order or stacking relative to each other. When you melt the diamond the carbon atoms are no longer in this special order and when it cools back down they do not return to the original stacking.

There are other forms of carbon, such as graphite and amorphous carbon. Most likely you would end up with amorphous carbon.

Greg Bradburn



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