For Ni3Fe system

  • Reitveld Analysis

planes :: peak height ratio

111 : 002 : 022 :: 1 : 0.474 : 0.267

Now if I consider a unit cell of Ni3Fe. Then d-spacing for various plane is already known and hence number of planes in that orientation can be calculated in given unit cell.

For example: (111) oriented plane , d111 = unit length/sqrt(3)

Similarly d002 = unit length/2 , d022 = unit length/(2*sqrt(2))

Hence, planes :: d-spacing ratio

111 : 002 : 022 :: 1/sqrt(3) : 1/2 : 1/(2*sqrt(2))

So expected number of planes based on d-spacing considering

number of planes in inversely proportional to d-spacing.

Hence, planes :: number of planes

111 : 002 : 022 :: (2*sqrt(2))/sqrt(3) :(2*sqrt(2))/2 : (2*sqrt(2))/(2*sqrt(2))

111 : 002 : 022 :: 0.612 :0.707 : 1

I expected the peak height ratio :: number of planes ration to be same or at least proportional , but there seems no such relation. WHY?

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