RESEARCH DATA for Lok Yi Lee, Martin Frentrup, Menno J Kappers, Rachel A Oliver, Colin J Humphreys, and David J Wallis "Effect of growth temperature and V/III-ratio on the surface morphology of MOVPE-grown cubic zincblende GaN" Figure 5: Zb-GaN content determined by XRD as a function of the GaN epilayer growth temperature. T Zincblende Error °C % % 850 99.09 0.5 865 99.16 0.5 875 98.95 0.5 885 99.2 0.5 895 98.65 0.5 910 98.31 0.5