3D NLTE analysis of the most iron-deficient star, SMSS0313-6708 T. Nordlander, A. M. Amarsi, K. Lind, M. Asplund, P. S. Barklem, A. R. Casey, R. Collet and J. Leenaarts A&A, 597 (2017) A6 Published online: 19 December 2016 DOI: 10.1051/0004-6361/201629202