# chemistry

Fortran module: `chemistry`

## Parameters

User-configurable parameters (can be set via `param_dict`):

| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `ccol` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `ccoltocell` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `cocol` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `cocoltocell` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `dvode_cpu_end` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `dvode_cpu_start` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `dvode_cpu_time` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `dvode_istate_out` | `<class 'numpy.ndarray'>` | `0` |  |
| `dvode_istats` | `int32[(31,)]` | `array(31,)` |  |
| `dvode_rstats` | `float64[(22,)]` | `array(22,)` |  |
| `f_callback_error` | `<class 'numpy.ndarray'>` | `0` |  |
| `failedintegrationcounter` | `<class 'numpy.ndarray'>` | `0` |  |
| `h2col` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `h2coltocell` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `h2form` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `i` | `<class 'numpy.ndarray'>` | `0` |  |
| `ionlist` | `int32[(335,)]` | `array(335,)` |  |
| `istate` | `<class 'numpy.ndarray'>` | `0` |  |
| `itask` | `<class 'numpy.ndarray'>` | `0` |  |
| `j` | `<class 'numpy.ndarray'>` | `0` |  |
| `l` | `<class 'numpy.ndarray'>` | `0` |  |
| `lastdusttemp` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `lastgastemp` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `loopcounter` | `<class 'numpy.ndarray'>` | `0` |  |
| `min_abund` | `<class 'numpy.ndarray'>` | `1e-30` |  |
| `neq` | `<class 'numpy.ndarray'>` | `0` |  |
| `nion` | `<class 'numpy.ndarray'>` | `0` |  |
| `nummonolayers` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `oldtemp` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `points` | `<class 'numpy.ndarray'>` | `1` |  |
| `previntegrationtemp` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `rate` | `float64[(3421,)]` | `array(3421,)` |  |
| `ratiosurfacetobulk` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `solver_stats_counter` | `<class 'numpy.ndarray'>` | `0` |  |
| `tempdot` | `<class 'numpy.ndarray'>` | `0.0` |  |
| `writecounter` | `<class 'numpy.ndarray'>` | `0` |  |

## Constants (Read-Only)

Fortran PARAMETER constants (compile-time values):

| Constant | Type | Value |
|----------|------|-------|
| `dp` | `<class 'numpy.ndarray'>` | `8` |
| `maxconsecutivefailures` | `<class 'numpy.ndarray'>` | `10` |
| `maxloops` | `<class 'numpy.ndarray'>` | `10` |

## Runtime Access

Access `chemistry` parameters at runtime using `uclchem.advanced.GeneralSettings()`.
See [Accessing Fortran Parameters](index.html#accessing-fortran-parameters-at-runtime) on the main Fortran API page for examples.