# 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 aliases of the most common plasma functionality for user convenience. Aliases in PlasmaPy are denoted with a trailing underscore (e.g., alias_). For further details, please refer to the contributor guide’s section on aliases.

 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.