6. (Total:15 %) The metal aluminum has a FCC crystal structure. If the diffraction angle of two theta (2θ) for the (111) and (311) planes are 39.06 and 78.82°, when monochromatic X-radiation having a wave length of 0.15405nm is used,
申論題內容
(2) the two estimated lattice parameter values according to (111) and (311)
planes (5%).