Magnesium and silicon in interstellar dust: X-ray overview D. Rogantini, E. Costantini, S. T. Zeegers, M. Mehdipour, I. Psaradaki, A. J. J. Raassen, C. P. de Vries and L. B. F. M. Waters A&A, 641 (2020) A149 Published online: 24 September 2020 DOI: 10.1051/0004-6361/201936805