Why fcc has better properties than Bcc?

Face-centered cubic (FCC) structures generally exhibit better properties than body-centered cubic (BCC) structures due to their higher atomic packing efficiency and greater number of slip systems, which enhances ductility and malleability. FCC has a packing efficiency of about 74%, allowing for more atoms in a given volume, while BCC has a packing efficiency of around 68%. This atomic arrangement in FCC facilitates easier dislocation movement, leading to improved mechanical properties under stress. Additionally, FCC metals often have superior thermal and electrical conductivity compared to their BCC counterparts.