Mathesiusite
Chemical formula: K<sub>5</sub>(U<sup>6+</sup>O<sub>2</sub>)<sub>4</sub>(S<sup>6+</sup>O<sub>4</sub>)<sub>4</sub>(V<sup>5+</sup>O<sub>5</sub>)ยท4H<sub>2</sub>O
Cabinet No. 40
Chemical formula: K<sub>5</sub>(U<sup>6+</sup>O<sub>2</sub>)<sub>4</sub>(S<sup>6+</sup>O<sub>4</sub>)<sub>4</sub>(V<sup>5+</sup>O<sub>5</sub>)ยท4H<sub>2</sub>O