Tausonite is a mineral with a repeating crystal unit.
The simplest repeating unit in a crystal is called a unit cell. Each unit cell is defined in terms of lattice point the points in space about which the particles are free to vibrate in a crystal.
Tausonite, a mineral composed of Sr, O, and Ti, has the cubic unit cell shown in the drawing .
To see the full coordination environment of the other ions, we have to consider neighboring unit cells. How many oxygens are coordinated to strontium?
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