If the radius of the octahedral void is r and radius of the atoms in close- packing is R, derive relation between r and R.
prasanjeet kumar , 11 Years ago
Grade 8
1 Answers
Gaurav
Last Activity: 9 Years ago
Using Pythagoras theorem we get (2R)2= (R+r)2+(R+r)2 4R2= 2(R+r)2 Divide by 2 we get 2R2= (R+r)2 Take root both side we get R√2 =R+r R√2 – R = r r= R(√2–1) value of √2= 1.414 r= R(1.414–1) r = 0.414 R
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