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# sknano.structures.SWNTMixin.Natoms¶

SWNTMixin.Natoms

Number of atoms in nanotube.

Changed in version 0.3.0: Returns total number of atoms per nanotube. Use Natoms_per_unit_cell to get the number of atoms per unit cell.

$N_{\mathrm{atoms}} = 2N\times n_z = \frac{4(n^2 + m^2 + nm)}{d_R}\times n_z$

where $$N$$ is the number of graphene hexagons mapped to the nanotube unit cell and $$n_z$$ is the number of unit cells.