Siunitx

• How to Define a Subscripted Unit in siunitx
  Define a subscripted siunitx unit with DeclareSIUnit, format its symbol, and use it with qty or unit in this minimal working example.
• Can You Use nicefrac Within siunitx?
  Use nicefrac in a siunitx quantity by setting parse-numbers=false locally, so siunitx leaves the fraction untouched and formats the unit.