 Ticographic electron tomography from 34.5 million diffraction patterns is used to reconstruct an atomic resolution tilt series of a double-wall carbon nanotube, DWCNT, encapsulating a complex ZRTE sandwich structure, revealing a previously unobserved ZRTE2 phase in the core and allowing for the structural determination of beam-sensitive nanomaterials containing light elements. This article was authored by Philip M. Pells, Sinead M. Griffin, Scott Stomaya, and others.