Disordered spherical bead packs are anisotropic G. E. Schröder-Turk, W. Mickel, M. Schröter, G. W. Delaney, M. Saadatfar, T. J. Senden, K. Mecke and T. Aste EPL, 90 3 (2010) 34001 Published online: 07 May 2010 DOI: 10.1209/0295-5075/90/34001