Continuum-divided 30 μm feature with the SWS data of LL Peg shown in full black. The CDE model in full red assumes thermal contact and requires a sulfur abundance of about the solar value. In the model represented by the dashed blue line the CDE particles are not in thermal contact. To fit the strength of the feature sulfur needs to be  ~5 times the solar value. A DHS (full yellow line) and MIE (dashed green) model represent alternative shape distributions of particles in which the dust components are in thermal contact. The sulfur abundance in the MIE model has been adjusted to match the equivalent width of the observed feature.