Question

how is graphite different in syructure from diamond

Answer 1

Diamonds have a three dimensional network of strong covalent bonds, which makes it hard,
but graphite on the other hand has flat layers of carbon atoms held by weak van der Waal's
forces which makes graphite a weak object and easily breakable.

HOPE IT HELPS YOU

Answer 2

Both diamond and graphite are formed by carbon atoms, the difference lies in the manner in which the carbon atoms are bonded with one another. in diamond, each carbon atom is bonded to for other carbon atoms forming a rigid the dimensional structure. in graphite, each carbon atom is bonded to the other carbon atoms in the same plane giving a hexagonal array.
Hope this answer helps you.