Table 2. Description of known hexaferrite unit cells from the R, S and T fundamental unit blocks, and the larger M and Y building blocks.

We use the (…)_x nomenclature, where x refers to the number of repeated sequences within one complete unit cell.

Hexaferrite type	Structural unit blocks
M	(RS)2 = M2
Y	(TS)3 = Y3
W	(RS S)2 = (MS)2
X	(RS RS S)3 = (M2M)3
Z	(RS TS)2 = (MY)2
U	(RS RS TS)3 = (M2Y)3