POLYMORPHISM, ISOMORPHOUS, UNIT CELL, CRYSTAL LATTICE AND LATTICE ENERGY

by • 10/09/2013 • GeneralComments (0)801

POLYMORPHISM:

“A phenomenon in which a single substance exists in two or more crystal structures is called “POLYMORPHISIM” while the substance is polymorphous, e.g.

Graphite (carbon)                             Trigonal

Diamond (carbon)                            Tetrahedral

ISOMORPHOUS:

“A phenomenon in which many substances exits in a single crystalline form is called ISOMORPHISM” While substance is called Isomorphous.

NaCI                                      Cubical Crystal

AgNO3                                  Cubical Crystal

 

UNIT CELL:

The smallest unit of any crystalline substance, is called “Unit cell”.

CRYSTAL LATTICE AND LATTICE ENERGY:

When the particles of any crystalline substance are replaced by dots then crystal lattice are observed. While the amount of heat energy released when one mole of any crystalline substance form “CRYSTAL LATTICE” is called “LATTICE ENERGY”.

Is most unfit for him of all the young women http://www.collegewritingservice.org of his acquaintance.
Pin It

Leave a Reply