code: def calculate_maximum_diameter(self):
          
          self.maxd_atom_1, self.maxd_atom_2, self.maximum_diameter = max_dim(
              self.elements, self.coordinates)
          self.properties['maximum_diameter'] = {
              'diameter': self.maximum_diameter,
              'atom_1': int(self.maxd_atom_1),
              'atom_2': int(self.maxd_atom_2),
          }
          return self.maximum_diameter
docs: Return the maximum diamension of a molecule.
  
          Returns
          -------
          :class:`float`
              The maximum dimension of the molecule.