Anthony R. Kampf
Barbara P. Nash
Verified November 2018
Uroxite is named for its composition. It is the first natural uranyl (UR) oxalate (OX), which also makes it the first organic uranium mineral. Crystals occur as striated prisms or blades, up to about 1 mm long, with square ton rectangular cross-sections and steeply sloping terminations. Crystals typically occur in radiating sprays.
Anthony Kampf reported that his team discovered it on consecutive days in mines that are 136 km apart. They found it on September 22, 2016 at the Burro Mine, Slick Rock district, San Miguel County, Colorado, and on September 23, 2016 at the Markey Mine, Red Canyon, White Canyon mining district, San Juan County, Utah. The image is of crystals from the Burro Mine. Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 73514 and 73515 (Burro Mine), 73516 and 73517 (Markey Mine)