Alluaudite is a relatively common alkaline manganese iron phosphate mineral with the chemical formula . It occurs as metasomatic replacement in granitic pegmatites and within phosphatic nodules in shales.
It was first described in 1848 for an occurrence in SkellefteÃÂ¥, Västerbotten, Sweden. It was named by Alexis Damour after François Alluaud (II) (1778âÂÂ1866). The mineral structure was first described in 1955.