Modelling the carbon AGB star R Sculptoris - Constraining the dust properties in the detached shell based on far-infrared and sub-millimeter observationsM. Brunner, M. Maercker, M. Mecina, T. Khouri and F. KerschbaumA&A, 614 (2018) A17DOI: https://doi.org/10.1051/0004-6361/201732065