Arsenuranospathite
Arsenuranospathite is a rare mineral with the chemical formula Al22F·20H2O. The name "arsenuranospathite" as arsenate analog of uranospathite was first used by Walenta with reference to a uranyl-arsenate mineral from Black Forest massif, Germany.
Later it was undoubtedly demonstrated that the name arsenuranospathite was applied, at least, to two different species – proper arsenuranospathite, ideally Al22F·20H2O, orthorhombic, and its partially dehydrated analogue, Al22F·nH2O, tetragonal or pseudo-tetragonal.