图4为3.3Zn合金中的第二相，从形貌上看，它与图3中的18R没有明显

FIG 4 is a 3.3Zn alloy second phase, the morphology of view, it is not significantly different and 18R in FIG. 3, but the diffraction pattern (FIG. 4c) is entirely different, calibrated, the second phase to 14H [8]. Therefore, in the alloy containing Zn, we find that the long period, there are two phases, including 18R and 14H. For long-period phase, Li et al [3] was observed only in the Mg-Gd-Yb-Zn alloy to 14H, not detected 18R. And Zhu et al [8] found that in the Mg-Y-Zn alloys cast 14H and 18R can be two kinds of long-period phase coexist.

Figure 4 is the second phase of the 3.3Zn alloy, from the appearance of the image, it is not significantly different from the 18R in Figure 3, but its diffraction pattern (Figure 4c) is completely different, after calibration, this second phase is 14H. So in an alloy containing Zn, we find that there are two long-period phases, including 18R and 14H. For long-period phases, Li et al. have only observed 14H in mg-Gd-Yb-Zn alloys and 18R has not been detected. Zhu et al. found that 14H and 18R long-cycle phases can exist together in Mg-Y-Zn cast alloys.

Fig. 4 is the second phase in 3.3zn alloy. From the morphology, it has no obvious difference with 18r in Fig. 3, but its diffraction pattern (Fig. 4C) is totally different. After calibration, the second phase is 14h [8]. Therefore, we find that there are two long period phases in Zn containing alloys, including 18r and 14h. For the long period phase, Li et al. [3] only observed 14h in mg GD Yb Zn alloy, but did not detect 18r. However, Zhu et al. [8] found that 14h and 18r long-period phases can coexist in mg-y-zn as cast alloy.<br>