10. Expressions for Burgers vectors for FCC and BCC crystal structures, are of the form b= (uvw) where a is the unit cell edge length. Also, since the magnitudes of these Burgers vectors may be determined from the following equation: | b| = (u + v + +v + w) 1/2 determine values of \b\ for aluminum (FCC with R=0.1431nm) and chromium (BCC with R=0.1249nm).