Wiktionary
weeksite
n. (context mineralogy English) An orthorhombic-dipyramidal yellow mineral containing barium, calcium, hydrogen, oxygen, potassium, silicon, and uranium.
Wikipedia
Weeksite
Weeksite is a naturally occurring uranium silicate mineral with the chemical formula: K(UO)SiO•4(HO), potassium uranyl silicate. Weeksite has a Mohs hardness of 1-2. It was named for USGS mineralogist Alice Mary Dowse Weeks (1909–1988).