Going to help on MaterialData returns paclet not found.
Evaluating it, it returns unevaluated:
In[2]:= MaterialData[] Out[2]= MaterialData[]
In the V10 help system:
guide/PhysicsAndChemistryDataAndComputation
We find:
Thank you for letting us know about this. It might be that we intended to get this data paclet out in a future release. I'm not sure actually. Either way, I've forwarded a report so that this can be fixed.
Thanks for the reference. I would say this is a bug. Someone forgot to add it in? If it is in the help, it should be there, but it is not. Please report to support@wolfram.com
I do not see such symbol at all in V10 in the list of the 8579 symbols. Can you please show a link to where this is documented to be in V10?