Figure 6
(a) Rietveld plot of a sample taken from the surface of the correctly colored yellow magnesia floor of Fig. 4 (left) at T = 295 K, containing quartz, F5 phase, aragonite, gypsum, goethite, and traces of periclase and rock salt. (b) Rietveld plot of a sample taken from the surface of the bleached yellow magnesia floor of Fig. 4(b) (right) at T = 295 K, containing quartz, F5 phase, aragonite, gypsum, and traces of bassanite and goethite. |