The Figure shows the 2H and the 3R lattices of MoS2. Lee et al., 2016, considered the "Raman signatures of polytypism in molybdenum disulfide". In the graphical abstract, it is possible to find a top view of the two lattices. "Since the stacking order sensitively affects various physical properties of layered materials," it is important to have an accurate determination of it. "Because 2H-molybdenum disulfide (MoS2) is most common in nature, most studies so far have focused on 2H-MoS2. However, [Lee and coworkers] found that the 2H, 3R, and mixed stacking sequences exist in few-layer MoS2 exfoliated from natural molybdenite crystals. … The Raman signatures of different polytypes are investigated by using 3 different excitation energies … The low-frequency breathing and shear modes show distinct differences for each polytype whereas the high frequency intra-layer modes show little difference." . "The main E 1 2g and A1g modes are observed at ~383 and ~407 cm -1 , respectively, for both polytypes". As in the Table given above, the two modes are due to "intra-layer vibrations along the in-plane or out-of-plane directions, respectively" . "There is no significant difference in the intra-layer vibration modes, which implies that each constituent layer is almost identical for both polytypes". This result by "The Raman spectroscopic analysis confirms the bulk nature of the pyramid; in fact, the MoS2 E2g and A1g Raman modes appear at 381.7 cm -1 and 406.6 cm -1 , with a separation of 24.9 cm -1 , which is indicative of bulk MoS2 (see references in Negri et al.). The surrounding triangular structure is in the monolayer form; in fact, the E2g and A1g modes, set at 382.8 cm -1 and 403.3 cm -1 respectively, have a 20.5 cm -1 separation, a signature of monolayer MoS2.