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JIPMER 2013
Exam
JIPMER
Year
2013
Subject
Chemistry
Chapter
Solid State

JIPMER 2013 · Chemistry · Solid State

KF has ccp structure. How many F^ - ions and octahedral voids are...

KF has ccp structure. How many F−\mathrm{F}^{-}ions and octahedral voids are there in this unit cell respectively?

Options

  1. A4 and 4
  2. B4 and 8
  3. C8 and 4
  4. D6 and 6

Correct answer

A. 4 and 4

Step-by-step solution

In fcc structure, there are 4 F−4 \mathrm{~F}^{-}ions in the packing and hence 4 octahedral voids.
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