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I What does total number of atomic sites mean ?

  1. Mar 30, 2016 #1
    i know this might seem as a very simple question , but i am confused :
    in order to calculate the total number of vacancies we need the total number of atomic sites N , and since N depends on the density of the material , then N refers to the number of atoms , right ? what confuses me is the word site , because it implies :(the total number of atoms + number of vacancies) .
    so my question is : does the total number of sites include vacancies ?
  2. jcsd
  3. Mar 30, 2016 #2
    pl. give the context in which you are looking at the vacancies.

    If you are analysing defects in crystal's structure - vacancies are separately counted - and N represents the total no. of sites where defects can have potential role and its counted as number of lattice sites where atom can be placed - its the fraction N(D)/N which is measured.
    N is also named as Potential defect sites. so if you take the total no. of lattice sites it serves the purpose.
  4. Mar 30, 2016 #3
    Thank you so much , I reread your replie so many times and you explained it so clearly , thank you .
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