Structure of Ionic Crystals
Table: Types of ionic crystal with description
Crystal structure type | Brief description |
Examples |
Co-ordination number | Number of formula units per unit cell |
Type AB Rock salt (NaCl) type |
It has fcc arrangement in which ![]() ![]() |
Halides of Li, Na, K, Rb, AgF, AgBr, NH4Cl, NH4Br, NH4I etc. |
|
4
|
Zinc blende (ZnS) type | It has ccp arrangement in which ![]() ![]() ![]() |
![]() |
|
4 |
Type AB2 Fluorite (CaF2) type |
It has arrangement in which ![]() ![]() ![]() ![]() |
![]() ![]() |
|
4 |
Antifluorite type | Here negative ions form the ccp arrangement so that each positive ion is surrounded by 4 negative ions and each negative ion by 8 positive ions | ![]() |
|
4 |
Caesium chloride (CsCl) type | It has the bcc arrangement with ![]() ![]() |
![]() ![]() ![]() |
|
1
|
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