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Example of Ionic Crystal

Ionic crystals are compounds of elements held together by ionic bonds. The compound must have at least two components which are ionized, although many have several. Bonds are quite strong, usually electrostatic, at 1000kj per molecule. There are no free electrons. As crystals, they from regulated shapes either simple cubes or complex forms including the poly faceted forms of tetrahedral and octahedral forms. The more complex types of compounds are those with multiple ionic elements as components. Ionic crystals are generally lattice structures, very hard and with high melting points. These substances are also known as ionic solids.

Examples of Ionic Crystals:

Salt
Potassium Chloride
Lead sulphate
Magnesium oxide
Iron oxide
Calcium Titanium oxide
Magnetite
Chromite
http://www.seas.upenn.edu/~chem101/sschem/ionicsolids.html
http://ocw.mit.edu/NR/rdonlyres/1498B922-14DD-4D52-903D-874D18F14C07/0/lecture05_slides.pdf
http://en.wikipedia.org/wiki/Ionic_crystal

Image Example of Ionic Crystal:

Sodium chloride (halite) crystal structure. Each atom has six nearest neighbors, with octahedral geometry. This arrangement is known as cubic close packed (ccp).
Light blue = Na+
Dark green = Cl-

         


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