Temperature-dependent thermal expansivities of multicomponent natural melts between 993 and 1803 K

The resulting data for volumes near glass transition temperature (993 - 1010 K) and at super-liquidus temperature (1512 - 1803 K) are combined to yield temperature-dependent thermal expansivities over the entire supercooled and stable liquid range. These results confirm the observation of Knoche et al. [Knoche, R., Dingwell, D.B., Webb, S.L., 1992a. Non-linear temperature dependence of liquid volumes in the system albite-anorthite-diopside. Contrib. Mineral. Petrol. 111, 61-73], Knoche et al. [Knoche, R., Dingwell, D.B., Wegg, S.L., 1992b. Temperature-dependent thermal expansivities of silicate melts: the system anorthite-diopside. Geochim. Cosmochim. Acta 56, 689-699], Toplis and Richet [Toplis, M.J., Richet, P., 2000. Equilibrium density and expansivity of silicate melts in the glass transition range. Contrib. Mineral. Petrol. 139, 672-683], Gottsmann and Dingwell [Gottsmann, J., Dingwell, D.B., 2002. Thermal expansivities of supercooled haplobasaltic liquids. Geochim. Cosmochim. Acta 66 (12) 2231-2238] of the temperature dependence of thermal expansivity. In the systems investigated here, the temperature dependence of thermal expansivity increases from basalt/basanite to tephriphonolite compositions.