Scanning tunneling microscopy (STM), reflection high energy electron diffraction (RHEED) and Auger electron spectroscopy (AES) experiments have been performed to study details of a (2 6) reconstructed surface of InSb(111)A. The results obtained are as follows: The (2 6) surface exists purely and solely in the narrow temperature range of 200 and 215°C where Sb atoms are considerably slowly desorbed from the domain boundaries. Above 215°C, vacancies and voids are formed by the desorption of Sb which constitutes the (2 6) surface. However, the RHEED experiment evidences the (2 6) surface to leave its own structure almost unchanged up to 230°C.