def calculate_pore_diameter(self):
self.pore_diameter, self.pore_closest_atom = pore_diameter(<EOL>self.elements, self.coordinates)<EOL>self.properties['<STR_LIT>'] = {<EOL>'<STR_LIT>': self.pore_diameter,<EOL>'<STR_LIT>': int(self.pore_closest_atom),<EOL>}<EOL>return self.pore_diameter<EOL>
Return the intrinsic pore diameter.

Returns
-------
:class:`float`
    The intrinsic pore diameter.