Get the list of elements for a Site

        Args:
             site (Site): Site to assess
        Returns:
            [Element]: List of elements

def _get_elements(self, site):
        """
        Get the list of elements for a Site

        Args:
             site (Site): Site to assess
        Returns:
            [Element]: List of elements
        """
        try:
            if isinstance(site.specie, Element):
                return [site.specie]
            return [Element(site.specie)]
        except:
            return site.species.elements