Leesite, leószilárdite and redcanyonite are three new uranyl minerals discovered growing on the walls of old uranium mines in southern Utah. An alumnus of Michigan Technological University found them.
Olds says leószilárdite is a particularly interesting find because of the Carbon Mineral Challenge. The challenge runs through September 2019, with the goal to discover as many new carbon-based minerals as possible. The Deep Carbon Observatory, the organization leading the project, predicts there are still at least 145 unknown carbon minerals. Leószilárdite is one of eight discovered and officially recognized by the International Mineralogical Association since December 2015.