write the types of deffects which affect the density of the crystilline solid?

@ akash 
the density of a solid will be given by mass/ volume , 
so, there are certain defect which will affect the density of the crystals , they are below .. 
1- schotky defect – it will decrease the density of the crystal . 
2- frankel defect – no change in the density of the substances . 
3- vacancy defect – it also decrease the density of solid , but its for non ionic crystals . 
4- interstitial defect – it doesnot have any significant effect on the density of solid crystal , 
HOPE IT CLEARS YOUR DOUBT .