KF has ccp structure. Calculate the radius of unit cell if the side of the cube or edge length is 400 pm. How many ` Fe^(-)` ions and octahedral voids are there in the unit cell ?

KF has ccp structure. Calculate the radius of unit cell if the side of

1.	KF has ccp structure. Calculate the radius of unit cell if the side of the cube or edge length is 400 pm. How many ` Fe^(-)` ions and octahedral voids are there in the unit cell ?
Answer» ccp is same as fcc, hence, ` r= a/ (2sqrt2) = 0.3535 a = 0.3535 xx 400 "pm" = 141.4 ` pm. In fcc, struture, ther are ` 4 F^(-)` ions in the packing and hence 4 octahedral voids.

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KF has ccp structure. Calculate the radius of unit cell if the side of the cube or edge length is 400 pm. How many ` Fe^(-)` ions and octahedral voids are there in the unit cell ?

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