Infrared SED of R Dor. ISO data are shown in red. The black body represents the stellar emission at a temperature of 3000 K, the blue dash-dotted line indicates a model assuming a 100% condensation of aluminium into amorphous Al₂O₃ that resides in the stellar outflow, the brown dotted line shows the model fit for Al₂O₃ residing in the GBDS, while the black dashed line represents a model fit for amorphous Al₂O₃ that is present in the GBDS and silicates in the stellar outflow.