- (U, Ca, Fe, Y, Th)3�(Ti, Si)5O16
U = 27.9 to 43.6 percent, Th = 0.26 to 4.4 percent.
Color: Black to brown. Rare. In granite rocks, placers.
Source: Frondel, Judith Weiss and Michael Fleischer. 1955. Glossary of
Uranium- and Thorium-Bearing Minerals, Third Edition. Washington DC: United
States Government Printing Office
A monoclinic mineral, (U,Ca,Y,Ce)(Ti,Fe)2 O6 ;
radioactive; commonly metamict; in placers of the Stanley Basin, UT.
Dictionary of Mining, Mineral, and Related Terms