Tundrite-(Ce)
Chemical formula: Na<sub>2</sub>Ce<sup>3+</sup><sub>2</sub>Ti<sup>4+</sup>O<sub>2</sub>SiO<sub>4</sub>(CO<sub>3</sub>)<sub>2</sub>
Cabinet No. 40
Chemical formula: Na<sub>2</sub>Ce<sup>3+</sup><sub>2</sub>Ti<sup>4+</sup>O<sub>2</sub>SiO<sub>4</sub>(CO<sub>3</sub>)<sub>2</sub>