– Ti 6 (octahedra) : O 3 (trigonal planar)
Distorted O with Ti in half of Oh holes
Polyhedra – Layers of edge-sharing and edge-sharing
, vertex-sharing between layers
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The rutile structure adopted by one polymorph of TiO2: (a) the buckled close-packed layers of oxide ions, arrowed, with titanium cations in half the octahedral holes (the unit cell is outlined); (b) the unit cell, showing the titanium coordination to oxide ions; and (c) its projection representation.
Related Structure: Anatase (TiO2)