The PeriodicTable class
-----------------------

.. autoclass:: rockverse.dualenergyct.PeriodicTable

Methods
^^^^^^^

.. automethod:: rockverse.dualenergyct.PeriodicTable.as_dict
.. automethod:: rockverse.dualenergyct.PeriodicTable.as_dataframe
.. automethod:: rockverse.dualenergyct.PeriodicTable.add_element