Diamond's electronic and optical properties are far more similar to those of silicon than they are to graphite, graphene, or other forms of carbon. Diamond and

Diamond's electronic and optical properties are far more similar to those of silicon than they are to graphite, graphene, or other forms of carbon. Diamond and silicon are diamond cubic lattices with sp3 hybridization (tetrahedral), graphite and related planar allotropes have sp2 hybridization (triangular).