“…The layered TMDs can be produced with many structure modifications, polytypes, misfit layer structures, and mixed layer structures. The 2Ha [5], 2Hb [6], 3R [7], 4Ha [8], 4Hd [9], and 6R [9] polytypes observed in NbSe 2 , MoS 2 , TaSe 2 are superlattices of the double period of the formula unit for the first two, the triple period for the third, the quadruple period for the fourth and the fifth, and the sextuple period for the last. The misfit structures are types of superlattices and observed in lanthanide titanium chalcogenides [10,11], tin titanium sulfides [12,13], lanthanide vanadium selenide [14], lanthanide chromium sulfide [15], lanthanide niobium chalcogenides [16][17][18], and lanthanide tantalum chalcogenides [17,18].…”