Two tetrahedral holes per anion are found in a close packed array of anions. These tetrahedral holes are located in two different sets of tetrahedra formed by the anions.
Anion
Layer 1 (brown)
Anion
Layer 2 (yellow)
Two different sets of tetrahedral holes
are found in a closest packed array
These tetrahedral holes point "up" (out
of the screen)
These tetrahedral holes are hidden by
the anions in the second layer
These tetrahedral holes point "down"
(into the screen)
These tetrahedral holes are visible bewteen
the anions in the second layer
Copyright ©
2003
by: Journal of Chemical Education Software
by: Journal of Chemical Education Software