In the rutile structure, the cation is in 6 coordination with the O. These octahedra form chains, cross-linked by sharing corners at each cation-O bond. The central cation as an electrostatic valency of 2/3.
| Mineral | Formula |
| cassierite | SnO2 |
| pyrolusite | MnO2 |
| rutile | TiO2 |
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