sknano.structures.SWNT.t1

SWNT.t1

$t_{1} = \frac{2m + n}{d_{R}}$

where $d_R = \gcd{(2n + m, 2m + n)}$.

The component of the translation vector $\mathbf{T}$ along $\mathbf{a}_1$:

$$\mathbf{T} = t_1\mathbf{a}_{1} + t_2\mathbf{a}_2$$