Figure 1 : Schematic of the H and T structures of 2D-MX2 systems.

From: Spin-orbital effects in metal-dichalcogenide semiconducting monolayers

Figure 1

(a) H structure in a trigonal prismatic perspective and (b) xy plane view of the H structure. (c,d) correspond to the T structure in the octahedron perspective and in the xy view respectively. Blue circles represent the layer of metallic atoms sandwiched between top (light yellow circles) and bottom (dark yellow circles) layers of dichalcogenide atoms.