Which mineral has been named incorrectly?

| Mineral | Formula |
|---|---|
| Bauxite | $\text{Al}_2\text{O}_3\cdot 2\text{H}_2\text{O}$ |
| Corundum | $\text{Al}_2\text{O}_3$ |
| Cryolite | $3\text{NaF}\cdot\text{AlF}_3$ |
| Fluorspar | $\text{Be}_3\text{Al}_2\text{Si}_6\text{O}_{18}$ |