Formulae on Solid State


 


1
The faces , edges and interfacial angles are related as , f + c =e+2 ,Where f =no. of faces , e= no. of edges , c= no .of interfacial angles.



2
The law of symmetry states that all crystals of same substances possess the same elements of symmetry.



   3
Density of unit cell= Mass of the unit cell /Volume of the unit cell



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