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Unformatted text preview: single cell. . .as drawn! ~ x Note the direction lies in the plane, thence hu + kv + .ew = ° 0.3+13+3.1=0 The ionic radius of nickel is 0.069 nm Calculate the packing factor of the FCC ionic compound NiO. and of oxygen is 0.140 nm. 5 Volume of Atoms (FCC so 4 of each per cell) (FCC so 2Rl + 2R2 = a) =Q.1.Q The cell sketched is tetragonal (a = b ;t: c ; a = J3 = l' = 900). Identify the direction sketched ~ state how .many directions are equivalent by symmetry . ..belong to the same family. 6. From start to end of line in cell, we go 0, Y2, I z The direction is, thus , clearing fractions. We cannot change the position of the '2', as the c axis is not equivalent to the a and b. y x Hence, we have (012], ...as sketched. 4...
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- Fall '11
- Atom, Ionic Radius, linear density, BCC Cr, FCC ionic compound