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The limiting fictive temperatures (T f ') of 16 multi-component silicate glasses have been derived quantitatively from heat capacity measurements, following the method of Moynihan et al. (1976). These quantitative values of T f ' closely match temperatures corresponding to the onset (T onset ) of the rapid rise in dilatometry heating curves (dL/L vs. T) at the glass transition, obtained on glasses with similar cooling histories. The mean deviation (T f '- T onset ) is 5 K, whereas the maximum deviation is 17 K. These results confirm that the T f ' of a silicate glass can be determined from the T onset  of a glass dilatometry curve with an uncertainty that is &lt;20 K. An application of the T f ' measurements includes the precise determination of the specific volumes of supercooled liquids at their respective T f ' values (Lange 1997). By comparison with other measurements in the literature, the accuracy of the T f ' method for determining low-temperature, fully relaxed, supercooled liquid volumes is shown. A comparison of volume-temperature models in the literature shows that a linear model (where thermal expansivity is independent of temperature) provides a superior fit of measured volumes in the SiO 2 -Al 2 O 3 -MgO-CaO-Na 2 O-K 2 O system over very wide temperature intervals (700-1900 K).

american mineralogist

Determination of the limiting fictive temperature of silicate glasses from calorimetric and dilatometric methods: Application to low-temperature liquid volume measurements