Question
Download Solution PDFAtomic radius of BCC structure is given by ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation
BCC crystal structure: BCC stands for Body-Centered Cubic. In one unit cell, there is one atom at center, 1 atom at each corner. The crystal structure is used for Brittle materials only.
AC = Body diagonal of the unit cell
a = Side of the unit cell
\(a√ 3 = 4r\)
\(r = \frac{{√ 3 a}}{4}\)
|
characteristics |
BCC |
FCC |
HCP |
|
a to r relation |
\(a = \frac{{4r}}{{√ 3 }}\) |
a=2r√2 |
\(a = 2r\) |
|
The average number of atoms |
2 |
4 |
6 |
|
Co-ordination number |
8 |
12 |
12 |
|
APF |
0.68 |
0.74 |
0.74 |
|
Examples |
Na, K, V, Mo, Ta, W |
Ca, Ni, Cu, Ag, Pt, Au, Pb, Al |
Be, Mg, Zn, Cd, Te |
Last updated on May 17, 2025
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