Wikipedia
Plášilite
Plášilite is a very rare uranium mineral with the formula Na(UO)(SO)•3HO. Chemically related minerals include natrozippeite, belakovskiite, meisserite, fermiite and oppenheimerite. Most of these uranyl sulfate minerals were originally found in the Blue Lizard mine, San Juan County, Utah, US. The mineral is named after Czech crystallographer Jakub Plášil.