Modeling of C stars with core/mantle grains: Amorphous carbon + SiC S. Lorenz-Martins, F. X. de Araújo, S. J. Codina Landaberry, W. G. de Almeida and R. V. de Nader A&A, 367 1 (2001) 189-198 Published online: 15 February 2001 DOI: 10.1051/0004-6361:20000411