“…In previous studies [19][20][21][22][23][24]26,27,29], solubility and crystallization of molybdenum phases have been examined by using glasses with a relatively smaller amount of MoO 3 (<10 wt% or 5 mol%, for example, composition B in Figure 1). In this case, because MoO 3 content is less than equilibrium solubility at temperature (T 1 ), phase separation and/or crystallization may occur during cooling, even if it is a single liquid at T 1 .…”