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Describe the bcc unit cell and hence determine the packing fraction |
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Answer» BCC UNIT CELL can be described as,,, ___ if an atom present at the body centre, it is not SHARED by any other unit cell. so that one atom completely BELONGS to same unit cell. packing fraction :---__ packing fraction, the fraction of volume occupied by the spheres in the structure. ✴️ Packing fraction = V(sphere) / V(unit cell) = 2×4/3 p R3 / (4/sqrt(3) R3) = 3 p / 8 = 0.6802. |
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