Why do you think a metal for example like tungsten might cry

Why do you think a metal, for example, like tungsten, might crystallize as BCC when there are no close packed planes just close packed directions. Please explain thoroughly!

Solution

Metal, like tungsten for example have high strength and are hard and therefore prefer a BCC lattice. BCC structure has no closed-packed planes and therefore does not have a stacking sequence. Neither does it have stacking faults. That lack of faults in the lattice structure accounts for the strength and hardness of tungsten.

Different lattices leads to different physical properties of bulk metals. For example, FCC metals, Cu, Au, Ag, are usually soft and \'ductile\', which means they can be bent and shaped easily. BCC metals are less ductile but stronger, eg iron, while HCP metals are usually brittle. Zinc is HCP and is difficult to bend without breaking, unlike copper. Many other features depend upon the crystal structure of metals, such as density, deformation processes, alloying behavior, and much more.