Wiktionary
hureaulite
alt. (context mineral English) A manganese phosphate mineral occurring in granite pegmatites. n. (context mineral English) A manganese phosphate mineral occurring in granite pegmatites.
Wikipedia
Hureaulite
Hureaulite is a manganese phosphate with the formula Mn(POOH)(PO)·4HO. It was discovered in 1825 and named in 1826 for the type locality, Les Hureaux, Saint-Sylvestre, Haute-Vienne, Limousin, France. It is sometimes written as huréaulite, but the IMA does not recommend this for English language text.
A complete series exists from lithiophilite, LiMnPO to triphylite, LiFePO, including hureaulite, strengite, FePO·2HO, stewartite, MnFe(OH,PO)·8HO, and sicklerite, (LiMn,Fe)PO.