(a) The schematic diagrams of atomic arrangement of 2H_c- and 2H_a-MoS₂ structures, where the Mo and S atoms are represented by blue and yellow balls, respectively. (b) Pressure-dependent variations of lattice parameter a, intralayer S–S distance c, and Mo–S bond length d. (c) Bond angles θ and ψ as a function of pressure. (d) Interlayer distance t as a function of pressure.