Why does graphite act as a lubricant?

1. Graphite consists of hexagonal layers of carbon atoms. 2. Strong covalent bonds hold each layer together internally. 3. Adjacent layers are held only by weak van der Waals forces. 4. Weak inter-layer forces let the layers slide past each other easily. 5. This sliding ability gives graphite its lubricating property. 6. Diamond cannot do this because all bonds are equally strong. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_