The Rules in the Geometric Structure of Tetrahedral (Td) Nanocarbons

The main purpose of this article is to find the rules for the geometric structure of the tetrahedral (T_d) nanocarbons. Also, we would like to demonstrate the ways that we derive the formulas for these rules by simple figures and illustrations. We hope that with these derived formulas of the rules, we will be able to derive all types of the Tetrahedral Nanocarbon Clusters (without consideration for the case of distortion).