Question

Which of the following is/are not a common crystal structure in metals (mark all that apply)? a. Face-centered cubic (FCC) b. Face-centered orthorhombic (FCOR) C. Body-centered cubic (BCC) (HCP)

Answer 1

Answer:  b) FCOR( Face-centered orthorhombic)

Explanation: Face centered orthorhombic lattice is the lattice that has eight lattice corner points and they also have each face  with center lattice point.This lattice structure is usually not common in metals.Whereas the face centered lattice structure , body structure lattice and hexagonal close packed lattice are common in metal.Thus option (b) is the correct option.