InterviewSolution
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InterviewSolution
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Percentage of void space in AB solid having rock salt structure if `(r_(+))/(r_(-)) = (1)/(2)` having cation anion contact. Given `pi = 3.15` |
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Answer» Correct Answer - 0.3 `r_(+) + r_(-) = (a)/(2) rArr (3r)/(2) = (a)/(2) , r - =(a)/(3) and r_(+) = (a)/(6)` Packing fraction `= (4 XX (4)/(3) PI (r_(+)^(3) + r_(-)^(3)))/(a^(3)) = (4 xx (4)/(3) pi [((a)/(6))^(3) + ((a)/(3))^(3)])/(a^(3)) = 0.7` Percentage void = 30% |
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