If a is the distance in an NaCl crystal from an Na+ ion to one of its nearest-neighbor Cl- ions, what is the distance from an Na+ ion to one of its next to nearest Cl- ions?
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If a is the distance in an NaCl crystal from an Na+ ion to one of its nearest-neighbor Cl- ions, what is the distance from an Na+ ion to one of its next to nearest Cl- ions?
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