Typical Ionic Structures

The structures in the table below can be viewed using the Chime plug-in. Try rotating the structures to give the best view. The mode of display (ie ball & stick, space-filling etc) may also be changed in some cases.

The following sphere packings are also available:

Structure

Anion arrangement

Cation arrangement

Anion c.n.

Cation c.n.

Rocksalt NaCl

ccp array of Cl-

Na+ in all octahedral holes

6

6

CsCl

simple cubic array of Cl-

Cs+ in all (cubic) holes

8

8

Fluorite

CaF2

F- in all tetrahedral holes

ccp array of Ca2+

4

8

Rutile

TiO2

hcp array of O2- (distorted)

Ti4+ in half octahedral holes

3

6

Wurtzite

(hexagonal ZnS)

hcp array of S2-

Zn2+ in half tetrahedral holes

4

4

Zinc blende (cubic ZnS)

ccp array of S2-

Zn2+ in half tetrahedral holes

 

4

 

4

 

Perovskite (CaTiO3) has a structure which is adopted by many ABX3 compounds.

 

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