HySPH - Mist
Mist is a fog-like density field and hence completely different from splashes and foam. You will not find any particle-specific parameters. Since mist is a consequence of fragmented splash and/or wet particles, the presence of a splash or wet emitter is essential ("Splash & Foam" and "Wet and Foam" emitters do not work!).
Quick Start
The image above is the result of quick start tutorial: