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The Sb-O partial phase diagram is based primarily on [57Hen]. The melting point of Sb2O3 is 655 °C [30Hin]. The polymorphic transformation temperature of Sb2O3 is 570 °C [36Bue]. [64Rog] obtained bSbO2 by heating aSbO2 at 1130 °C. According to [57Hen], liquid "Sb2O3" decomposes into SbO and O2 at 1380 °C, solid "SbO2" decomposes into Sb2O3 and O2 at 1230 °C, and solid Sb2O5 decomposes into liquid SbO2 and O2 at 525 °C, under 1 atm pressure. The eutectic point between Sb2O3 an SbO2 is at 60.1 at.% O and 650 °C [57Hen].Extrapolation of the L/[L + SbO2] phase boundary indicates that the melting point of SbO2 under a constrained condition is 1820 ?10 °C [57Hen].--H.O.
27Sim: A. Simon, Z. Anorg. Allg. Chem., 165, 31-40 (1927).
30Hin: W.B. Hinke, J. Am. Chem. Soc., 52, 3869-3877 (1930).
36Bue: M.J. Buerger, Am. Mineralog., 21(3), 206-207 (1936).
38Dih: K. Dihlstrom and A. Westgren, Z. Anorg. Allg. Chem., 235, 153-160 (1938) in German.
42Alm: K.E. Almin and A. Westgren, Ark. Kemi Mineral. Geol. B, 15(22), 6 p (1942).
57Hen: H. Hennig and E.J. Kohlmeyer, Z. Erzbergbau Metallhüttenwes., 10(1), 8-15 (1957) in German.
64Rog: D. Roger and A.C. Skapski, Proc. Chem. Soc., 400-401 (1964).
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