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CGP EDU Academic Team
Published on: August 14, 2026
In Rock Salt type structure cations (radius r) occupy Octahedral holes in the FCC of anions (radius R) such that there is no distortion in the FCC lattice. Find the perimeter of the shaded region.
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An ionic solid AB 2 isomorphous to the Rutile structure (a tetragonal system with effective number of formula units = 2) has edge lengths of the unit cell of 4Å and 7Å. Calculate the density of the substance if its formula weight is 80. Take N A = 6 × 10 23 and express your answer in mg/cc using four significant digits.
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