SmCo₅ CaCu₅-type (P6/mmm #191, a=4.99 Å, c=3.97 Å). Hexagonal, magnetic, metallic, with free Wyckoff coordinates (Co 2c at 1/3,2/3,0; Co 3g at 1/2,0,1/2). Discriminator cell for Orb v3 symmetry erasure Mode 2 — pending row in Hermes's 13-cell matrix.