ccp showing octahedral holes in yellow and tetrahedral holes in purple.
Right click to change view; left click to rotate
(This may be viewed using the CHIME plugin)
Cubic Close packing has layers ABCABC (blue, red, green, ...)
A ccp unit cell contains 4 spheres.
There are 4 octahedral holes per unit cell (yellow).
There are 8 tetrahedral holes per cell (purple).
Spin the structure to see where holes sit relative to layers.
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