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# sknano.structures.compute_rt¶

sknano.structures.compute_rt(*Ch, *, bond=None, **kwargs)[source][source]

Compute nanotube radius $$r_t$$ in Å.

$r_t = \frac{|\mathbf{C}_h|}{2\pi}$
Parameters: *Ch : {tuple or ints} Either a 2-tuple of ints or 2 integers giving the chiral indices of the nanotube chiral vector $$\mathbf{C}_h = n\mathbf{a}_1 + m\mathbf{a}_2 = (n, m)$$. bond : float, optional Distance between nearest neighbor atoms (i.e., bond length). Must be in units of Å. Default value is the carbon-carbon bond length in graphite, approximately $$\mathrm{a}_{\mathrm{CC}} = 1.42$$ Å float Nanotube radius $$r_t$$ in Å.