Fig. 1: Polytypes of NbS2.
Crystalline lattices of 1T-NbS2 (a), 2H-NbS2 (b) and 3R-NbS2 (c). The corresponding 1-, 2- and 3-layer unit cells are marked with black wireframes. The compass shows the directions of the principal axes for all three structures. 2H-NbS2 and 3R-NbS2 share the same structure in the a–b plane, but have different stacking of layers along the c axis. For 3R-NbS2, only one Nb atom with 6 nearest S atoms are shown for the middle two layers, for a clearer illustration of the stacking. Images produced with VESTA57.
