Figure 3
From: Brillouin spectroscopy of fluid inclusions proposed as a paleothermometer for subsurface rocks
Determination of TX with Brillouin spectroscopy for FIs containing pure water.
(a) Brillouin shift ΔfB as a function of temperature for pure water. The solid black curve is 
along the liquid vapour equilibrium. The data points show ΔfB for FI1 (red diamonds), FI2 (green squares) and FI3 (blue circles). The dotted curves show fits of the data with ΔfB(T) calculated with formulations from the International Association for the Properties of Water and Steam (IAPWS) (see Methods) and treating the density ρ as a free parameter. The crossing point with the LVE curve gives for each FI TX and its uncertainty (see Table 1). (b) The difference 
is shown for each FI (same symbols as in panel (a)). A linear fit is performed on each data set (solid lines) to give TX as the temperature at which it crosses zero and its uncertainty (see Table 1).
