It has extremely large crystallographic planes and can approach a single crystal structure. Generally, PG’s mechanical, thermal, and electrical properties are far superior to conventional hexagonal ...

Diamond, graphite and graphene are forms of carbon with different giant covalent structures. Metals and alloys - AQA The structure of metals explains their high melting and boiling points and ...

It melts at 3727 C. The stable form of carbon at room temperature is Graphite which has a hexagonal crystal structure. (Top diagram) Diamond is metastable at room temperature and has a diamond cubic ...