The 90–110 μm dust feature in low to intermediate mass protostars: Calcite? A. Chiavassa, C. Ceccarelli, A. G. G. M. Tielens, E. Caux and S. Maret A&A, 432 2 (2005) 547-557 Published online: 02 March 2005 DOI: 10.1051/0004-6361:20041891