A) \[6.8\,\,\overset{o}{\mathop{A}}\,\]
B) \[4.3\,\,\overset{o}{\mathop{A}}\,\]
C) \[3.0\,\,\overset{o}{\mathop{A}}\,\]
D) \[8.6\,\,\overset{o}{\mathop{A}}\,\]
Correct Answer: B
Solution :
| Neighbour distance of a body centred cubic cell \[d=\frac{\sqrt{3}}{2}a,\] where a is the lattice parameter. |
| \[\Rightarrow \] \[3.7=\frac{\sqrt{3}a}{2}\] |
| or \[a=\frac{2\times 3.7}{\sqrt{3}}=4.3\,\,\overset{o}{\mathop{A}}\,\] |
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