Weeksite
Chemical formula: K<sub>2</sub>(U<sup>6+</sup>O<sub>2</sub>)<sub>2</sub>(Si<sub>5</sub>O<sub>13</sub>)ยท4H<sub>2</sub>O
Cabinet No. 40
Chemical formula: K<sub>2</sub>(U<sup>6+</sup>O<sub>2</sub>)<sub>2</sub>(Si<sub>5</sub>O<sub>13</sub>)ยท4H<sub>2</sub>O