Why is graphite used as a lubricant

There are weaker covalent bonds between these layers, hence they can easily slide over each other. Due to this, it is a lubricant, since the layers slide over each other so easily. ... Graphite is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.

Carbon atoms form STRONG bonds within each graphite layer but weak bonds between layers.

Explanation:

answer; talc and gypsum;