Arsenuranospathite
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Arsenuranospathite (IMA symbol: Aush[1]) is a rare mineral with the chemical formula Al(UO2)2(AsO4)2F·20H2O.[2] The name "arsenuranospathite" as arsenate analog of uranospathite[3] was first used by Walenta (1963)[4] with reference to a uranyl-arsenate mineral from Black Forest (Schwarzwald) massif, Germany.
Later it was undoubtedly demonstrated that the name arsenuranospathite was applied, at least, to two different species – proper arsenuranospathite, ideally Al(UO2)2(AsO4)2F·20H2O, orthorhombic, and its partially dehydrated analogue, Al(UO2)2(AsO4)2F·nH2O (n = 8–10), tetragonal or pseudo-tetragonal.
Yellow to yellow-greenish, transparent to opaque tabular and prismatic crystals, with perfect cleavage. Transparent to translucent. Hardness = ~2. Radioactive.[3]