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# sknano.structures.SWNTMixin.Natoms_per_unit_cell¶

SWNTMixin.Natoms_per_unit_cell

Number of atoms in nanotube unit cell.

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

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