A nomenclature classification scheme has been approved by IMA-CNMNC for the magnetoplumbite group, with the general formula A[B₁₂]O_19. The classification on the highest hierarchical level is decided by the dominant metal at the 12-coordinated A sites, at present leading to the magnetoplumbite (A = Pb), hawthorneite (A = Ba) and hibonite (A = Ca) subgroups. Two species remain ungrouped. Most cations, with valencies from 2+ to 5+, show strong order over the five crystallographic B sites present in the crystal structure, which forms the basis for the definition of different mineral species. A new name, chihuahuaite, is introduced and replaces hibonite-(Fe).