# Miscellaneous Plasma Parameters (plasmapy.formulary.misc)

Functions for miscellaneous plasma parameter calculations.

## Functions

 Bohm_diffusion(T_e, B) Return the Bohm diffusion coefficient. Calculate the magnetic energy density. Calculate the magnetic pressure. mass_density(density, particle[, z_ratio]) Calculate the mass density from a number density. Return the thermal pressure for a Maxwellian distribution.

## Aliases

PlasmaPy provides short-named (alias) versions of the most common plasma functionality. These aliases are only given to functionality where there is a common lexicon in the community, for example has the alias . All aliases in PlasmaPy are denoted with a trailing underscore _.

 DB_(T_e, B) Alias to Bohm_diffusion. Alias to magnetic_pressure. pth_(T, n) Alias to thermal_pressure. rho_(density, particle[, z_ratio]) Alias to mass_density. Alias to magnetic_energy_density.