The Density of Titanium(IV) Oxide Liquid
The density of TiO2 liquid in equilibrium with air has been measured at 1875\xb0 to 1925\xb0C using an Ir double bob Archimedean method. The melt density data have been combined with data extrapolated from the CaSiO3\u2500TiO2 join at 1600\xb0C. A combined fit to these density data yields the following description of the density of liquid TiO2: \u03c1= 3.7611 - 0.00028T(\xb0C), in the temperature range of 1600\xb0 to 1925\xb0C. This expansivity value is consistent with those obtained on TiO2-rich melts using a Pt-based system at lower temperature and with multicomponent oxide data. The similarity between the volume of liquid TiO2 and that of crystalline rutile implies a dominantly octahedral coordination of Ti in the liquid state.