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CaS exists in a cubic close packed arran...

CaS exists in a cubic close packed arrangement of `S^(2-)` ions in which `Ca^(2+)` ions occupy 1/2 of the available tetrahedral holes. How many `Ca^(2+)and S^(2-)` ions are contained in the unit cell?

A

1,1

B

2,4

C

4,4

D

4,2

Text Solution

Verified by Experts

The correct Answer is:
C
no. of `S^(2-) = 8 xx 1/8 + 6 xx 1/2 = 4`
no. of `Ca^(2+) = 1/2 xx 8 = 4`
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DISHA PUBLICATION-THE SOLID STATE-EXERCISE -1 : CONCEPT BUILDER
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