Iron changes from the face-centered cubic structure, which is called austenite. to the body-centered cubic structure, which is called ferrite, when cooling in the solid state. If the atom diameter of...

Iron changes from the face-centered cubic structure, which is called austenite. to the body-centered cubic structure, which is called ferrite, when cooling in the solid state. If the atom diameter of iron is 2.5 angstroms, calculate the volume of one gram mole in both the FCC structure and the BCC structure. Does it expand or contract?