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Question: Answered & Verified by Expert
A mineral has molecular formula XY2O4 . O2- ions are arranged in ccp and cations of X are present in octahedral voids. Cations of Y are equally distributed among octahedral and tetrahedral voids. The fraction of the octahedral voids occupied will be
ChemistrySolid StateJEE Main
Options:
  • A 16
  • B 18
  • C 14
  • D 12
Solution:
2455 Upvotes Verified Answer
The correct answer is: 12
Number of O2- ions = n
Number of tetrahedral voids = 2n
Number of octahedral voids = n
Number of Y ions =n2 ,
Number of X ions =n4
Occupied octahedral voids =n4+n4=n2
So fraction of occupied octahedral voids =12 .

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