What is "abernathyite"

n. (context mineral English) A rare hydrous uranium oxide mineral that forms yellow vitreous tabular crystals with perfect cleavage.

Abernathyite is a mineral with formula K(UO)(AsO)·3HO. The mineral is named after Jesse Evrett Abernathy (1913–1963) who first noted it in 1953 in the U.S. State of Utah. It was described as a new mineral species in 1956. Abernathyite is yellow and occurs as small crystals.