# `feos.cubic`

```{eval-rst}
.. important::
    This implementation of the Peng-Robinson equation of state is intended to be used
    as simple example when considering implementing an equation of state. It is not
    a sophisticated implementation and should probably not be used to do research.
```

## Data types

```{eval-rst}
.. currentmodule:: feos.cubic

.. autosummary::
    :toctree: generated/

    Identifier
    ChemicalRecord
    PureRecord
    BinaryRecord
    PengRobinsonRecord
    PengRobinsonParameters
```