# How is graphite a covalent solid?

I know it is covalent because there are covalent bonds between atoms of carbon in the same plane. But there are Van der Waals interactions between different planes. Isn't this a feature of molecular solids?

• We think of graphite as being a "pure" chemical which it really isn't since the graphite sheets can have different size. But most pure chemicals have a consistent 3D structure, which graphite does not. So graphite is odd in that sense too. – MaxW Nov 20 '16 at 15:23
• You seem to already know what graphite really is. Don't bother with meaningless categorisation such as the one you ask about. – Karl Nov 20 '16 at 23:36
• @MaxW: I see.  – Vincenzo Oliva Nov 21 '16 at 9:57
• "covalent solid" is of course a very useful category if you compare one with ionic or molecular solids. – Karl Nov 21 '16 at 19:26