We investigate atomic and electronic structures of the intriguing low-temperature phase of IrTe2 using
high-resolution scanning tunneling microscopy and spectroscopy. We confirm various stripe superstructures
such as ×3, ×5, and ×8. The strong vertical and lateral distortions of the lattice for the stripe structures are
observed in agreement with recent calculations. The spatial modulations of electronic density of states are clearly
identified as separated from the structural distortions. These structural and spectroscopic characteristics are not
consistent with the charge-density wave and soliton lattice model proposed recently. Instead, we show that the
Ir (Te) dimerization together with the Ir 5d charge ordering can explain these superstructures, supporting the Ir
dimerization mechanism of the phase transition.