In a solid AB, having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then resulting stoichiometry of the solid

Question

In a solid AB, having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then resulting stoichiometry of the solid is

Prashant Kotian · Accepted Answer

Correct answer: D. A atoms form the FCC lattice: from corners + from faces = 4. B atoms occupy octahedral voids = 4. Removing face-centred atoms along one axis removes 2 face-centred A atoms. Remaining A atoms = . B atoms remain 4. The formula is . Therefore, correct answer is D.

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