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Trying to calculate the density of LiNbO3 from perovskite

  1. Mar 6, 2017 #1
    1. The problem statement, all variables and given/known data
    upload_2017-3-6_17-49-48.png
    This is what I have so far. I'm using the theoretical density formula for crystaline solids
    big_thumb.jpg
    but the actual theoretical density is supposed to be 4.644g/cm^3

    Am I missing something? I'm using the right formula, am I not?
     

    Attached Files:

  2. jcsd
  3. Mar 7, 2017 #2
    First, from your formula I get 3.85 g/cm3, not 3.5. And there are not 5 "LiNbO3" units in the unit cell. Count them again.
     
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