© Powder X-ray diffraction Ewald's sphere Incident beam 20 02不 133 111 002 004 222113 022 Fig.8.2 The schematic of the powder diffraction cones produced by a polycrystalline copper sam- ple using Cu Ka radiation.The differences in the relative intensities of various Bragg peaks (diffraction cones)are not discriminated,and they may be found in Table 8.1.Each cone is marked with the corresponding triplet of Miller indices. 材料科学与工程学院 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering Powder X-ray diffraction