Alluaudite is a relatively common alkaline manganese iron phosphate mineral with formula (Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃, of secondary (metasomatic) origin, related with granitic pegmatites mainly. Named by Alexis Damour in 1847 after François Alluaud (II) (1778-1866).