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If a crystal lattice has 6 closed-pack spheres, what the number of tetrahedral voids in the lattice?(a) 12(b) 6(c) 36(d) 3The question was posed to me during an interview for a job.My enquiry is from Solid State in chapter Solid State of Chemistry – Class 12

Answer»

Correct answer is (a) 12

Easiest explanation: For a crystal LATTICE, if there are N close-packed SPHERES the NUMBER of tetrahedral voids are 2N and number octahedral voids are N. For N=6, number of tetrahedral voids = 2 × 6 = 12.



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