Count Anions
Click the links on the right to view anions in the NaCl structure. You may also show a drawing of the unit cell if this would help.
Some
anions are shared among 8 unit cells. Others are shared between 2 unit
cells.
1/2 of an anion in each face x 6 faces +
1/8 of an anion at each corner x 8 corners
= 4 anions per cell
1/8 of an anion at each corner x 8 corners
= 4 anions per cell
One half of an anion in each face is located inside the unit cell
One eighth of an anion at each corner is located inside the unit cell
Copyright ©
2003
by: Journal of Chemical Education Software
by: Journal of Chemical Education Software