compute_Natoms_per_unit_cell

sknano.core.structures.compute_Natoms_per_unit_cell(*Ch)

Compute \(N_{\mathrm{atoms/cell}} = 2N\).

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

where \(N\) is the number of graphene hexagons mapped to the nanotube unit cell.

Parameters:*Ch –

Either a 2-tuple of ints or 2 integers giving the chiral indices of the nanotube chiral vector \(\mathbf{C}_h = n\mathbf{a}_1 + m\mathbf{a}_2 = (n, m)\).

Returns:`2N` – Number of atoms in nanotube unit cell: N_{mathrm{atoms}} = 2N = frac{4(n^2 + m^2 + nm)}{d_R} Return type:int