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Add your own
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The idea is VolFe is flexible and adaptable, such that new parameterisations for :doc:`model dependent variables <current_mdv>` can be added as they become available.
New calculation types (and even new species!) can also be added, but those are more involved (get in touch if you have ideas!).

In these examples we show you how to add new parameterisations for model dependent variables:

- :doc:`Example 6a <Examples/6a. solubility_constant>`: Solubility constants (example for H\ :sub:`2` S).

- :doc:`Example 6b <Examples/6b. new_fO2>`: Fe\ :sup:`3+`/Fe\ :sub:`T` to *f*\ :sub:`O2` dependence.